Minor functions adjustment

numass-core/src/main/java/inr/numass/data/SpectrumDataAdapter.java

@@ -26,7 +26,6 @@ import hep.dataforge.values.Value;
 import hep.dataforge.values.Values;
 
 /**
- *
  * @author Darksnake
  */
 public class SpectrumDataAdapter extends XYAdapter {
@@ -86,8 +85,11 @@ public class SpectrumDataAdapter extends XYAdapter {
             return Value.of(super.getYerr(point).doubleValue() / getTime(point));
         } else {
             double y = super.getY(point).doubleValue();
-            if (y <= 0) {
+            if (y < 0) {
                 throw new DataFormatException();
+            } else if (y == 0) {
+                //avoid infinite weights
+                return Value.of(1d / getTime(point));
             } else {
                 return Value.of(Math.sqrt(y) / getTime(point));
             }

numass-main/src/main/groovy/inr/numass/scripts/models/TristanModel.groovy

@@ -3,20 +3,24 @@ package inr.numass.scripts.models
 import hep.dataforge.context.Context
 import hep.dataforge.context.Global
 import hep.dataforge.fx.plots.PlotManager
-import hep.dataforge.grind.Grind
 import hep.dataforge.grind.GrindShell
 import hep.dataforge.grind.helpers.PlotHelper
 import hep.dataforge.meta.Meta
+import hep.dataforge.stat.fit.FitManager
+import hep.dataforge.stat.fit.FitStage
+import hep.dataforge.stat.fit.FitState
 import hep.dataforge.stat.fit.ParamSet
 import hep.dataforge.stat.models.XYModel
 import hep.dataforge.stat.parametric.ParametricFunction
+import hep.dataforge.tables.Table
 import inr.numass.NumassPlugin
+import inr.numass.data.SpectrumDataAdapter
 import inr.numass.data.SpectrumGenerator
-import inr.numass.models.GaussResolution
 import inr.numass.models.NBkgSpectrum
+import inr.numass.models.NumassModelsKt
+import inr.numass.models.misc.GaussFunction
 import inr.numass.models.sterile.NumassBeta
-import inr.numass.models.sterile.NumassTransmission
+import inr.numass.utils.DataModelUtils
-import inr.numass.models.sterile.SterileNeutrinoSpectrum
 
 import static hep.dataforge.grind.Grind.morph
 
@@ -25,18 +29,14 @@ ctx.getPluginManager().load(PlotManager)
 ctx.getPluginManager().load(NumassPlugin)
 
 new GrindShell(ctx).eval {
-    ParametricFunction spectrum = new SterileNeutrinoSpectrum(
+    def beta = new NumassBeta().getSpectrum(0)
-            ctx,
+    def response = new GaussFunction(4.0)
-            Grind.buildMeta(useFSS: false),
+    ParametricFunction spectrum = NumassModelsKt.convolute(beta, response)
-            new NumassBeta(),
-            new NumassTransmission(ctx, Meta.empty()),
-            new GaussResolution(5d)
-    )
 
-    def model = new XYModel(Meta.empty(), new NBkgSpectrum(spectrum));
+    def model = new XYModel(Meta.empty(), new SpectrumDataAdapter(), new NBkgSpectrum(spectrum));
 
     ParamSet params = morph(ParamSet, [:], "params") {
-        N(value: 1e+04, err: 30, lower: 0)
+        N(value: 1e+12, err: 30, lower: 0)
         bkg(value: 1.0, err: 0.1)
         E0(value: 18575.0, err: 0.1)
         mnu2(value: 0, err: 0.01)
@@ -44,26 +44,30 @@ new GrindShell(ctx).eval {
         U2(value: 0.0, err: 1e-3)
         X(value: 0.0, err: 0.01, lower: 0)
         trap(value: 1.0, err: 0.05)
-        w(300, err: 5)
+        w(value: 150, err: 5)
     }
 
     SpectrumGenerator generator = new SpectrumGenerator(model, params, 12316);
 
     PlotHelper ph = plots
 
-    ph.plot((10000..18500).step(100).collectEntries {
+    ph.plot((2000..19500).step(100).collectEntries {
         [it, model.value(it, params)]
-    })
+    }, "spectrum").configure(showLine: true, showSymbol: false, showErrors: false, thickness: 3, color: "red")
 
-//
+
-//    def data = generator.generateData(DataModelUtils.getUniformSpectrumConfiguration(10000, 18500, 10*24*3600, 850));
+    Table data = generator.generateData(DataModelUtils.getUniformSpectrumConfiguration(10000, 19500, 1, 950));
-//
+
-//    FitState state = new FitState(data, model, params);
+    //params.setParValue("w", 151)
-//
+
-//    def fm = ctx.getFeature(FitManager)
+    ph.plot(data).configure(color: "blue")
-//
+
-//    def res = fm.runStage(state, "QOW", FitStage.TASK_RUN, "N", "bkg", "E0", "U2");
+    FitState state = new FitState(data, model, params);
-//
+
-//
+    def fm = ctx.getFeature(FitManager)
-//    res.print(ctx.io.out());
+
+    def res = fm.runStage(state, "QOW", FitStage.TASK_RUN, "N", "bkg", "E0", "U2");
+
+
+    res.printState(ctx.io.out().newPrintWriter());
 }

numass-main/src/main/java/inr/numass/Main.java

@@ -134,7 +134,7 @@ public class Main {
             if (!outDir.exists()) {
                 outDir.mkdirs();
             }
-            context.putValue(NumassIO.NUMASS_OUTPUT_CONTEXT_KEY, outDir.toString());
+            context.putValue(NumassIO.Companion.getNUMASS_OUTPUT_CONTEXT_KEY(), outDir.toString());
         }
     }
 

numass-main/src/main/java/inr/numass/NumassIO.java

@@ -1,137 +0,0 @@
-/* 
- * Copyright 2015 Alexander Nozik.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package inr.numass;
-
-import ch.qos.logback.classic.LoggerContext;
-import ch.qos.logback.classic.encoder.PatternLayoutEncoder;
-import ch.qos.logback.classic.spi.ILoggingEvent;
-import ch.qos.logback.core.Appender;
-import ch.qos.logback.core.FileAppender;
-import hep.dataforge.context.Context;
-import hep.dataforge.io.BasicIOManager;
-import hep.dataforge.names.Name;
-import hep.dataforge.utils.ReferenceRegistry;
-import org.apache.commons.io.output.TeeOutputStream;
-import org.slf4j.LoggerFactory;
-
-import java.io.File;
-import java.io.IOException;
-import java.io.OutputStream;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
-/**
- * @author Darksnake
- */
-public class NumassIO extends BasicIOManager {
-
-    public static final String NUMASS_OUTPUT_CONTEXT_KEY = "numass.outputDir";
-
-    ReferenceRegistry<OutputStream> registry = new ReferenceRegistry<>();
-//    FileAppender<ILoggingEvent> appender;
-
-
-    @Override
-    public void attach(Context context) {
-        super.attach(context);
-    }
-
-    @Override
-    public Appender<ILoggingEvent> createLoggerAppender() {
-        LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
-        PatternLayoutEncoder ple = new PatternLayoutEncoder();
-
-        ple.setPattern("%date %level [%thread] %logger{10} [%file:%line] %msg%n");
-        ple.setContext(lc);
-        ple.start();
-        FileAppender<ILoggingEvent> appender = new FileAppender<>();
-        appender.setFile(new File(getWorkDirectory().toFile(), getMeta().getString("logFileName", "numass.log")).toString());
-        appender.setEncoder(ple);
-        return appender;
-    }
-
-    @Override
-    public void detach() {
-        super.detach();
-        registry.forEach(it -> {
-            try {
-                it.close();
-            } catch (IOException e) {
-                LoggerFactory.getLogger(getClass()).error("Failed to close output", e);
-            }
-        });
-    }
-
-    public String getExtension(String type) {
-        switch (type){
-            case DEFAULT_OUTPUT_TYPE:
-                return ".out";
-            default:
-                return "." + type;
-        }
-    }
-
-    @Override
-    public OutputStream out(Name stage, Name name, String type) {
-        List<String> tokens = new ArrayList<>();
-        if (getContext().hasValue("numass.path")) {
-            String path = getContext().getString("numass.path");
-            if (path.contains(".")) {
-                tokens.addAll(Arrays.asList(path.split(".")));
-            } else {
-                tokens.add(path);
-            }
-        }
-
-        if (stage != null && stage.getLength() != 0) {
-            tokens.addAll(Arrays.asList(stage.asArray()));
-        }
-
-        String dirName = String.join(File.separator, tokens);
-        String fileName = name.toString() + getExtension(type);
-        OutputStream out = buildOut(getWorkDirectory(), dirName, fileName);
-        registry.add(out);
-        return out;
-    }
-
-    private OutputStream buildOut(Path parentDir, String dirName, String fileName) {
-        Path outputFile;
-
-        if (!Files.exists(parentDir)) {
-            throw new RuntimeException("Working directory does not exist");
-        }
-        try {
-            if (dirName != null && !dirName.isEmpty()) {
-                parentDir = parentDir.resolve(dirName);
-                Files.createDirectories(parentDir);
-            }
-
-//        String output = source.meta().getString("output", this.meta().getString("output", fileName + ".onComplete"));
-            outputFile = parentDir.resolve(fileName);
-
-            if (getContext().getBoolean("numass.consoleOutput", false)) {
-                return new TeeOutputStream(Files.newOutputStream(outputFile), System.out);
-            } else {
-                return Files.newOutputStream(outputFile);
-            }
-        } catch (IOException ex) {
-            throw new RuntimeException(ex);
-        }
-    }
-}

numass-main/src/main/java/inr/numass/models/GaussResolution.java

@@ -1,159 +0,0 @@
-/* 
- * Copyright 2015 Alexander Nozik.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package inr.numass.models;
-
-import hep.dataforge.stat.parametric.AbstractParametricBiFunction;
-import hep.dataforge.values.ValueProvider;
-import hep.dataforge.values.Values;
-
-import static java.lang.Math.*;
-
-/**
- * @author Darksnake
- */
-public class GaussResolution extends AbstractParametricBiFunction {
-
-    private static final String[] list = {"w", "shift"};
-
-    private double cutoff = 4d;
-//    private final UnivariateIntegrator integrator = new SimpsonIntegrator(1e-3, Double.MAX_VALUE, 3, 64);
-
-    /**
-     * @param cutoff - расстояние в сигмах от среднего значения, на котором
-     *               функция считается обращающейся в ноль
-     */
-    public GaussResolution(double cutoff) {
-        super(list);
-        this.cutoff = cutoff;
-    }
-
-//    @Override
-//    public ParametricFunction getConvolutedSpectrum(final RangedNamedSetSpectrum bare) {
-//        return new AbstractParametricFunction(combineNamesWithEquals(this.namesAsArray(), bare.namesAsArray())) {
-//            int maxEval = Global.instance().getInt("INTEGR_POINTS", 500);
-//
-//            @Override
-//            public double derivValue(String parName, double x, Values set) {
-//                double a = getLowerBound(set);
-//                double b = getUpperBound(set);
-//                assert b > a;
-//                return integrator.integrate(maxEval, getDerivProduct(parName, bare, set, x), a, b);
-//            }
-//
-//            @Override
-//            public boolean providesDeriv(String name) {
-//                return "w".equals(name) || bare.providesDeriv(name);
-//            }
-//
-//            @Override
-//            public double value(double x, Values set) {
-//                double a = getLowerBound(set);
-//                double b = getUpperBound(set);
-//                assert b > a;
-//                return integrator.integrate(maxEval, getProduct(bare, set, x), a, b);
-//            }
-//        };
-//    }
-
-//    @Override
-//    public double getDeriv(String name, Values set, double input, double output) {
-//        return this.derivValue(name, output - input, set);
-//    }
-
-//    private UnivariateFunction getDerivProduct(final String name, final ParametricFunction bare, final Values pars, final double x0) {
-//        return (double x) -> {
-//            double res1;
-//            double res2;
-//            try {
-//                res1 = bare.derivValue(name, x0 - x, pars) * GaussResolution.this.value(x, pars);
-//            } catch (NameNotFoundException ex1) {
-//                res1 = 0;
-//            }
-//            try {
-//                res2 = bare.value(x0 - x, pars) * GaussResolution.this.derivValue(name, x, pars);
-//            } catch (NameNotFoundException ex2) {
-//                res2 = 0;
-//            }
-//            return res1 + res2;
-//        };
-//    }
-
-//    private double getLowerBound(final Values pars) {
-//        return getPos(pars) - cutoff * getW(pars);
-//    }
-
-
-
-//    private UnivariateFunction getProduct(final ParametricFunction bare, final Values pars, final double x0) {
-//        return (double x) -> {
-//            double res = bare.value(x0 - x, pars) * GaussResolution.this.value(x, pars);
-//            assert !isNaN(res);
-//            return res;
-//        };
-//    }
-
-//    private double getUpperBound(final Values pars) {
-//        return getPos(pars) + cutoff * getW(pars);
-//    }
-
-//    @Override
-//    public double getValue(Values set, double input, double output) {
-//        return this.value(output - input, set);
-//    }
-
-    private double getPos(ValueProvider pars) {
-        return pars.getDouble("shift", 0);
-    }
-
-    private double getW(ValueProvider pars) {
-        return pars.getDouble("w");
-    }
-
-    @Override
-    public boolean providesDeriv(String name) {
-        return true;
-    }
-
-
-    @Override
-    public double value(double x, double y, Values pars) {
-        double d = x - y;
-        if (abs(d - getPos(pars)) > cutoff * getW(pars)) {
-            return 0;
-        }
-        double aux = (d - getPos(pars)) / getW(pars);
-        return exp(-aux * aux / 2) / getW(pars) / sqrt(2 * Math.PI);
-    }
-
-    @Override
-    public double derivValue(String parName, double x, double y, Values pars) {
-        double d = x - y;
-        if (abs(d - getPos(pars)) > cutoff * getW(pars)) {
-            return 0;
-        }
-        double pos = getPos(pars);
-        double w = getW(pars);
-
-        switch (parName) {
-            case "shift":
-                return this.value(x, y, pars) * (d - pos) / w / w;
-            case "w":
-                return this.value(x, y, pars) * ((d - pos) * (d - pos) / w / w / w - 1 / w);
-            default:
-                return super.derivValue(parName, x, y, pars);
-        }
-    }
-}

numass-main/src/main/java/inr/numass/models/NBkgSpectrum.java

@@ -32,7 +32,7 @@ public class NBkgSpectrum extends AbstractParametricFunction {
     private static final String[] list = {"N", "bkg"};
 
     public MultiCounter counter = new MultiCounter(this.getClass().getName());
-    ParametricFunction source;
+    private final ParametricFunction source;
 
     public NBkgSpectrum(ParametricFunction source) {
         super(combineNamesWithEquals(source.namesAsArray(), list));

numass-main/src/main/java/inr/numass/models/SimpleRange.java

@@ -22,8 +22,8 @@ import hep.dataforge.values.Values;
  * @author Darksnake
  */
 public class SimpleRange implements SpectrumRange{
-    Double min;
+    private final Double min;
-    Double max;
+    private final Double max;
 
     public SimpleRange(Double min, Double max) {
         if(min>=max){

numass-main/src/main/kotlin/inr/numass/NumassIO.kt

@@ -0,0 +1,136 @@
+/* 
+ * Copyright 2015 Alexander Nozik.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package inr.numass
+
+import ch.qos.logback.classic.LoggerContext
+import ch.qos.logback.classic.encoder.PatternLayoutEncoder
+import ch.qos.logback.classic.spi.ILoggingEvent
+import ch.qos.logback.core.Appender
+import ch.qos.logback.core.FileAppender
+import hep.dataforge.context.Context
+import hep.dataforge.io.BasicIOManager
+import hep.dataforge.io.IOManager
+import hep.dataforge.names.Name
+import hep.dataforge.utils.ReferenceRegistry
+import org.apache.commons.io.output.TeeOutputStream
+import org.slf4j.LoggerFactory
+import java.io.File
+import java.io.IOException
+import java.io.OutputStream
+import java.nio.file.Files
+import java.nio.file.Path
+import java.util.*
+
+/**
+ * @author Darksnake
+ */
+class NumassIO : BasicIOManager() {
+
+    internal var registry = ReferenceRegistry<OutputStream>()
+    //    FileAppender<ILoggingEvent> appender;
+
+
+    override fun attach(context: Context) {
+        super.attach(context)
+    }
+
+    override fun createLoggerAppender(): Appender<ILoggingEvent> {
+        val lc = LoggerFactory.getILoggerFactory() as LoggerContext
+        val ple = PatternLayoutEncoder()
+
+        ple.pattern = "%date %level [%thread] %logger{10} [%file:%line] %msg%n"
+        ple.context = lc
+        ple.start()
+        val appender = FileAppender<ILoggingEvent>()
+        appender.file = File(workDirectory.toFile(), meta.getString("logFileName", "numass.log")).toString()
+        appender.encoder = ple
+        return appender
+    }
+
+    override fun detach() {
+        super.detach()
+        registry.forEach { it ->
+            try {
+                it.close()
+            } catch (e: IOException) {
+                LoggerFactory.getLogger(javaClass).error("Failed to close output", e)
+            }
+        }
+    }
+
+    private fun getExtension(type: String): String {
+        return when (type) {
+            IOManager.DEFAULT_OUTPUT_TYPE -> ".out"
+            else -> "." + type
+        }
+    }
+
+    override fun out(stage: Name?, name: Name, type: String): OutputStream {
+        val tokens = ArrayList<String>()
+        if (context.hasValue("numass.path")) {
+            val path = context.getString("numass.path")
+            if (path.contains(".")) {
+                tokens.addAll(Arrays.asList(*path.split(".".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray()))
+            } else {
+                tokens.add(path)
+            }
+        }
+
+        if (stage != null && stage.length != 0) {
+            tokens.addAll(Arrays.asList(*stage.asArray()))
+        }
+
+        val dirName = tokens.joinToString(File.separator)
+        val fileName = name.toString() + getExtension(type)
+        val out = buildOut(workDirectory, dirName, fileName)
+        registry.add(out)
+        return out
+    }
+
+    private fun buildOut(parentDir: Path, dirName: String?, fileName: String): OutputStream {
+        val outputFile: Path
+
+        if (!Files.exists(parentDir)) {
+            throw RuntimeException("Working directory does not exist")
+        }
+        try {
+            val dir = if (dirName.isNullOrEmpty()) {
+                parentDir
+            } else {
+                parentDir.resolve(dirName).also {
+                    Files.createDirectories(it)
+                }
+            }
+
+            //        String output = source.meta().getString("output", this.meta().getString("output", fileName + ".onComplete"));
+            outputFile = dir.resolve(fileName)
+
+            return if (context.getBoolean("numass.consoleOutput", false)!!) {
+                TeeOutputStream(Files.newOutputStream(outputFile), System.out)
+            } else {
+                Files.newOutputStream(outputFile)
+            }
+        } catch (ex: IOException) {
+            throw RuntimeException(ex)
+        }
+
+    }
+
+    companion object {
+
+        val NUMASS_OUTPUT_CONTEXT_KEY = "numass.outputDir"
+    }
+}

numass-main/src/main/kotlin/inr/numass/models/NumassModels.kt

@@ -9,6 +9,7 @@ import hep.dataforge.stat.parametric.AbstractParametricFunction
 import hep.dataforge.stat.parametric.ParametricFunction
 import hep.dataforge.utils.ContextMetaFactory
 import hep.dataforge.values.Values
+import inr.numass.models.misc.FunctionSupport
 import inr.numass.utils.NumassIntegrator
 import java.util.stream.Stream
 
@@ -103,17 +104,29 @@ operator fun ParametricFunction.times(num: Number): ParametricFunction {
 
 /**
  * Calculate convolution of two parametric functions
+ * @param func the function with which this function should be convoluded
+ * @param integrator optional integrator to be used in convolution
+ * @param support a function defining borders for integration. It takes 3 parameter: set of parameters,
+ * name of the derivative (empty for value) and point in which convolution should be calculated.
  */
-fun ParametricFunction.convolute(func: ParametricFunction,
+fun ParametricFunction.convolute(
-                                 integrator: UnivariateIntegrator<*> = NumassIntegrator.getDefaultIntegrator()): ParametricFunction {
+        func: ParametricFunction,
+        integrator: UnivariateIntegrator<*> = NumassIntegrator.getDefaultIntegrator(),
+        support: Values.(String, Double) -> Pair<Double, Double>
+): ParametricFunction {
     val mergedNames = Names.of(Stream.concat(names.stream(), func.names.stream()).distinct())
     return object : AbstractParametricFunction(mergedNames) {
         override fun derivValue(parName: String, x: Double, set: Values): Double {
-            TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+            val (a, b) = set.support(parName, x)
+            return integrator.integrate(a, b) { y: Double ->
+                this@convolute.derivValue(parName, y, set) * func.value(x - y, set) +
+                        this@convolute.value(y, set) * func.derivValue(parName, x - y, set)
+            }
         }
 
         override fun value(x: Double, set: Values): Double {
-            TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+            val (a, b) = set.support("", x)
+            return integrator.integrate(a, b) { y: Double -> this@convolute.value(y, set) * func.value(x - y, set) }
         }
 
         override fun providesDeriv(name: String?): Boolean {
@@ -123,3 +136,18 @@ fun ParametricFunction.convolute(func: ParametricFunction,
     }
 
 }
+
+@JvmOverloads
+fun <T> ParametricFunction.convolute(
+        func: T,
+        integrator: UnivariateIntegrator<*> = NumassIntegrator.getDefaultIntegrator()
+): ParametricFunction where T : ParametricFunction, T : FunctionSupport {
+    //inverted order for correct boundaries
+    return func.convolute(this, integrator) { parName, x ->
+        if (parName.isEmpty()) {
+            func.getSupport(this)
+        } else {
+            func.getDerivSupport(parName, this)
+        }
+    }
+}

numass-main/src/main/kotlin/inr/numass/models/misc/FunctionSupport.kt

@@ -0,0 +1,28 @@
+package inr.numass.models.misc
+
+import hep.dataforge.maths.HyperSquareDomain
+import hep.dataforge.values.Values
+
+interface FunctionSupport {
+    /**
+     * Get support for function itself
+     */
+    fun getSupport(params: Values): Pair<Double, Double>
+
+    /**
+     * GetSupport for function derivative
+     */
+    fun getDerivSupport(parName: String, params: Values): Pair<Double, Double>
+}
+
+interface BiFunctionSupport {
+    /**
+     * Get support for function itself
+     */
+    fun getSupport(x: Double, y: Double, params: Values): HyperSquareDomain
+
+    /**
+     * GetSupport for function derivative
+     */
+    fun getDerivSupport(parName: String, x: Double, params: Values): HyperSquareDomain
+}

numass-main/src/main/kotlin/inr/numass/models/misc/GaussFunction.kt

@@ -0,0 +1,81 @@
+/* 
+ * Copyright 2015 Alexander Nozik.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package inr.numass.models.misc
+
+import hep.dataforge.stat.parametric.AbstractParametricFunction
+import hep.dataforge.values.ValueProvider
+import hep.dataforge.values.Values
+
+import java.lang.Math.*
+
+/**
+ * @author Darksnake
+ */
+class GaussFunction(private val cutoff: Double = 4.0) : AbstractParametricFunction(list), FunctionSupport {
+
+    private fun getShift(pars: ValueProvider): Double {
+        return pars.getDouble("shift", 0.0)
+    }
+
+    private fun getW(pars: ValueProvider): Double {
+        return pars.getDouble("w")
+    }
+
+    override fun providesDeriv(name: String): Boolean {
+        return true
+    }
+
+
+    override fun value(d: Double, pars: Values): Double {
+        if (abs(d - getShift(pars)) > cutoff * getW(pars)) {
+            return 0.0
+        }
+        val aux = (d - getShift(pars)) / getW(pars)
+        return exp(-aux * aux / 2) / getW(pars) / sqrt(2 * Math.PI)
+    }
+
+    override fun derivValue(parName: String, d: Double, pars: Values): Double {
+        if (abs(d - getShift(pars)) > cutoff * getW(pars)) {
+            return 0.0
+        }
+        val pos = getShift(pars)
+        val w = getW(pars)
+
+        return when (parName) {
+            "shift" -> this.value(d, pars) * (d - pos) / w / w
+            "w" -> this.value(d, pars) * ((d - pos) * (d - pos) / w / w / w - 1 / w)
+            else -> return 0.0;
+        }
+    }
+
+    override fun getSupport(params: Values): Pair<Double, Double> {
+        val shift = getShift(params)
+        val w = getW(params)
+        return Pair(shift - cutoff * w, shift + cutoff * w)
+    }
+
+    override fun getDerivSupport(parName: String, params: Values): Pair<Double, Double> {
+        val shift = getShift(params)
+        val w = getW(params)
+        return Pair(shift - cutoff * w, shift + cutoff * w)
+    }
+
+
+    companion object {
+
+        private val list = arrayOf("w", "shift")
+    }
+}

numass-main/src/main/kotlin/inr/numass/models/sterile/SterileNeutrinoSpectrum.kt

@@ -18,6 +18,7 @@ import hep.dataforge.stat.parametric.AbstractParametricFunction
 import hep.dataforge.stat.parametric.ParametricBiFunction
 import hep.dataforge.values.ValueType.BOOLEAN
 import hep.dataforge.values.Values
+import inr.numass.getFSS
 import inr.numass.models.FSS
 import inr.numass.utils.NumassIntegrator