Example fix

build.gradle.kts

@@ -5,7 +5,7 @@ allprojects {
         jcenter()
         maven("https://kotlin.bintray.com/kotlinx")
     }
-    
+
     group = "scientifik"
     version = kmathVersion
 }

examples/build.gradle

@@ -1,39 +0,0 @@
-plugins {
-    id "java"
-    id "me.champeau.gradle.jmh" version "0.4.8"
-    id 'org.jetbrains.kotlin.jvm'
-}
-
-repositories {
-    maven { url 'https://dl.bintray.com/kotlin/kotlin-eap' }
-    maven{ url "http://dl.bintray.com/kyonifer/maven"}
-    mavenCentral()
-}
-
-dependencies {
-    implementation project(":kmath-core")
-    implementation project(":kmath-coroutines")
-    implementation project(":kmath-commons")
-    implementation project(":kmath-koma")
-    implementation group: "com.kyonifer", name:"koma-core-ejml", version: "0.12"
-    implementation "org.jetbrains.kotlinx:kotlinx-io-jvm:0.1.5"
-    //compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
-    //jmh project(':kmath-core')
-}
-
-jmh {
-    warmupIterations = 1
-}
-
-jmhClasses.dependsOn(compileKotlin)
-
-compileKotlin {
-    kotlinOptions {
-        jvmTarget = "1.8"
-    }
-}
-compileTestKotlin {
-    kotlinOptions {
-        jvmTarget = "1.8"
-    }
-}

examples/build.gradle.kts

@@ -0,0 +1,67 @@
+import org.jetbrains.gradle.benchmarks.JvmBenchmarkTarget
+import org.jetbrains.kotlin.allopen.gradle.AllOpenExtension
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+plugins {
+    java
+    kotlin("jvm")
+    kotlin("plugin.allopen") version "1.3.31"
+    id("org.jetbrains.gradle.benchmarks.plugin") version "0.1.7-dev-24"
+}
+
+configure<AllOpenExtension> {
+    annotation("org.openjdk.jmh.annotations.State")
+}
+
+repositories {
+    maven("https://dl.bintray.com/kotlin/kotlin-eap")
+    maven("http://dl.bintray.com/kyonifer/maven")
+    maven("https://dl.bintray.com/orangy/maven")
+    mavenCentral()
+}
+
+sourceSets {
+    register("benchmarks")
+}
+
+dependencies {
+    implementation(project(":kmath-core"))
+    implementation(project(":kmath-coroutines"))
+    implementation(project(":kmath-commons"))
+    implementation(project(":kmath-koma"))
+    implementation("com.kyonifer:koma-core-ejml:0.12")
+    implementation("org.jetbrains.kotlinx:kotlinx-io-jvm:0.1.5")
+
+    implementation("org.jetbrains.gradle.benchmarks:runtime:0.1.7-dev-24")
+
+
+    "benchmarksCompile"(sourceSets.main.get().compileClasspath)
+}
+
+// Configure benchmark
+benchmark {
+    // Setup configurations
+    targets {
+        // This one matches sourceSet name above
+        register("benchmarks") {
+            this as JvmBenchmarkTarget
+            jmhVersion = "1.21"
+        }
+    }
+
+    configurations {
+        register("fast") {
+            warmups = 5 // number of warmup iterations
+            iterations = 3 // number of iterations
+            iterationTime = 500 // time in seconds per iteration
+            iterationTimeUnit = "ms" // time unity for iterationTime, default is seconds
+        }
+    }
+}
+
+
+tasks.withType<KotlinCompile> {
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}

examples/src/benchmarks/kotlin/scientifik/kmath/structures/ArrayBenchmark.kt

@@ -7,7 +7,7 @@ import java.nio.IntBuffer
 
 
 @State(Scope.Benchmark)
-open class ArrayBenchmark {
+class ArrayBenchmark {
 
     @Benchmark
     fun benchmarkArrayRead() {
@@ -32,10 +32,10 @@ open class ArrayBenchmark {
             res += nativeBuffer.get(size - i)
         }
     }
-    
+
     companion object {
         val size = 1000
-        
+
         val array = IntArray(size) { it }
         val arrayBuffer = IntBuffer.wrap(array)
         val nativeBuffer = IntBuffer.allocate(size).also {

examples/src/benchmarks/kotlin/scientifik/kmath/structures/BufferBenchmark.kt

@@ -7,7 +7,7 @@ import scientifik.kmath.operations.Complex
 import scientifik.kmath.operations.complex
 
 @State(Scope.Benchmark)
-open class BufferBenchmark {
+class BufferBenchmark {
 
     @Benchmark
     fun genericDoubleBufferReadWrite() {

examples/src/benchmarks/kotlin/scientifik/kmath/structures/NDFieldBenchmark.kt

@@ -1,9 +1,12 @@
 package scientifik.kmath.structures
 
 import org.openjdk.jmh.annotations.Benchmark
+import org.openjdk.jmh.annotations.Scope
+import org.openjdk.jmh.annotations.State
 import scientifik.kmath.operations.RealField
 
-open class NDFieldBenchmark {
+@State(Scope.Benchmark)
+class NDFieldBenchmark {
 
     @Benchmark
     fun autoFieldAdd() {

examples/src/main/kotlin/scientifik/kmath/commons/prob/DistributionDemo.kt

@@ -0,0 +1,11 @@
+package scientifik.kmath.commons.prob
+
+import kotlinx.coroutines.flow.take
+import scientifik.kmath.chains.flow
+import scientifik.kmath.prob.Distribution
+import scientifik.kmath.prob.RandomGenerator
+
+fun main() {
+    val normal = Distribution.normal()
+    normal.sample(RandomGenerator.default)
+}

examples/src/main/kotlin/scientifik/kmath/operations/ComplexDemo.kt

@@ -0,0 +1,10 @@
+package scientifik.kmath.operations
+
+import scientifik.kmath.structures.NDElement
+import scientifik.kmath.structures.complex
+
+fun main() {
+    val element = NDElement.complex(2, 2) { index: IntArray ->
+        Complex(index[0].toDouble() - index[1].toDouble(), index[0].toDouble() + index[1].toDouble())
+    }
+}

kmath-core/src/commonMain/kotlin/scientifik/kmath/structures/ComplexNDField.kt

@@ -131,4 +131,7 @@ operator fun ComplexNDElement.plus(arg: Double) =
 operator fun ComplexNDElement.minus(arg: Double) =
     map { it - arg }
 
-fun NDField.Companion.complex(vararg shape: Int) = ComplexNDField(shape)
+fun NDField.Companion.complex(vararg shape: Int): ComplexNDField = ComplexNDField(shape)
+
+fun NDElement.Companion.complex(vararg shape: Int, initializer: ComplexField.(IntArray) -> Complex): ComplexNDElement =
+    NDField.complex(*shape).produce(initializer)

kmath-core/src/commonMain/kotlin/scientifik/kmath/structures/NDAlgebra.kt

@@ -57,6 +57,8 @@ interface NDAlgebra<T, C, N : NDStructure<T>> {
      * element-by-element invoke a function working on [T] on a [NDStructure]
      */
     operator fun Function1<T, T>.invoke(structure: N) = map(structure) { value -> this@invoke(value) }
+
+    companion object
 }
 
 /**

settings.gradle.kts

@@ -3,6 +3,7 @@ pluginManagement {
         jcenter()
         gradlePluginPortal()
         maven("https://dl.bintray.com/kotlin/kotlin-eap")
+        maven("https://dl.bintray.com/orangy/maven")
     }
     resolutionStrategy {
         eachPlugin {