forked from kscience/kmath
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5.4 KiB
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50 lines
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<h1 class="cover"><span>kmath-nd4j</span></h1>
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<div class="platform-hinted UnderCoverText" data-platform-hinted="data-platform-hinted"><div class="content sourceset-depenent-content" data-active="" data-togglable=":kmath-nd4j:dokkaHtmlPartial/main"><p class="paragraph">ND4J based implementations of KMath abstractions.</p><ul><li><p class="paragraph"># : NDStructure wrapper for INDArray</p></li><li><p class="paragraph"># : Rings over Nd4jArrayStructure of Int and Long</p></li><li><p class="paragraph"># : Fields over Nd4jArrayStructure of Float and Double</p></li></ul><h2 class=""> Artifact:</h2><p class="paragraph">The Maven coordinates of this project are <code>space.kscience:kmath-nd4j:0.3.0-dev-16</code>.</p><p class="paragraph">Gradle:</p><div class="sample-container"><code class="" theme="idea"><pre>repositories {<br> maven { url 'https://repo.kotlin.link' }<br> mavenCentral()<br>}<br><br>dependencies {<br> implementation 'space.kscience:kmath-nd4j:0.3.0-dev-16'<br>}</pre></code></div><p class="paragraph">Gradle Kotlin DSL:</p><div class="sample-container"><code class="" theme="idea"><pre>repositories {<br> maven("https://repo.kotlin.link")<br> mavenCentral()<br>}<br><br>dependencies {<br> implementation("space.kscience:kmath-nd4j:0.3.0-dev-16")<br>}</pre></code></div><h2 class=""> Examples</h2><p class="paragraph">NDStructure wrapper for INDArray:</p><div class="sample-container"><code class="" theme="idea"><pre>import org.nd4j.linalg.factory.*<br>import scientifik.kmath.nd4j.*<br>import scientifik.kmath.structures.*<br><br>val array = Nd4j.ones(2, 2).asDoubleStructure()<br>println(array[0, 0]) // 1.0<br>array[intArrayOf(0, 0)] = 24.0<br>println(array[0, 0]) // 24.0</pre></code></div><p class="paragraph">Fast element-wise and in-place arithmetics for INDArray:</p><div class="sample-container"><code class="" theme="idea"><pre>import org.nd4j.linalg.factory.*<br>import scientifik.kmath.nd4j.*<br>import scientifik.kmath.operations.*<br><br>val field = DoubleNd4jArrayField(intArrayOf(2, 2))<br>val array = Nd4j.rand(2, 2).asDoubleStructure()<br><br>val res = field {<br> (25.0 / array + 20) * 4<br>}<br><br>println(res.ndArray)<br>// [[ 250.6449, 428.5840], <br>// [ 269.7913, 202.2077]]</pre></code></div><p class="paragraph">Contributed by <a href="https://github.com/CommanderTvis">Iaroslav Postovalov</a>.</p></div></div>
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