Upgraded the lets-plot library and Kotlin API to the 4.x version and migrated the API (#569)

* Update Lets-Plot library and adjust import paths

Updated the Lets-Plot library in build.gradle from version 2.3.0 to 4.0.1 and 2.0.1 to 4.4.3.

* Refined comments and modified code for clarity

Refactored code for better readability. Corrected grammar and improved sentence structure in comments for better understanding. Also, tweaked theme configuration in 'PlotDefinition.kt' for explicit settings. Updated example comment on 'SoundNetFSDDVisualization.kt' to be singular as it demonstrates a single example.

Author: zaleslaw

examples/src/main/kotlin/examples/visualization/SoundNetFSDDVisualization.kt

@@ -33,13 +33,12 @@ private const val TEST_BATCH_SIZE = 512
 
 
 /**
- * This examples demonstrates model activations and Conv1D filters visualization.
+ * This example demonstrates model activations and Conv1D filters visualization.
  * Additionally, we present the visualization of sound files as the plots of the sound data.
  *
  * Model is trained on Free Spoken Digits Dataset.
  */
 fun main() {
-
     visualizeFSDDWavFiles()
 
     val (train, test) = freeSpokenDigits()

visualization/build.gradle

@@ -20,9 +20,9 @@ kotlin {
 
                 def excludeSLF4JImpl = { exclude group: 'org.slf4j', module: 'slf4j-simple' }
 
-                api 'org.jetbrains.lets-plot:lets-plot-batik:2.3.0', excludeSLF4JImpl
-                api 'org.jetbrains.lets-plot:lets-plot-common:2.3.0', excludeSLF4JImpl
-                api 'org.jetbrains.lets-plot:lets-plot-kotlin-api:2.0.1', excludeSLF4JImpl
+                api 'org.jetbrains.lets-plot:lets-plot-batik:4.0.1', excludeSLF4JImpl
+                api 'org.jetbrains.lets-plot:lets-plot-common:4.0.1', excludeSLF4JImpl
+                api 'org.jetbrains.lets-plot:lets-plot-kotlin-jvm:4.4.3', excludeSLF4JImpl
             }
         }
         androidMain {

visualization/src/jvmMain/kotlin/org/jetbrains/kotlinx/dl/visualization/letsplot/PlotConv2D.kt

@@ -5,11 +5,11 @@
 
 package org.jetbrains.kotlinx.dl.visualization.letsplot
 
-import jetbrains.letsPlot.Figure
 import org.jetbrains.kotlinx.dl.api.core.FloatData
 import org.jetbrains.kotlinx.dl.api.core.TrainableModel
 import org.jetbrains.kotlinx.dl.api.core.layer.convolutional.Conv2D
 import org.jetbrains.kotlinx.dl.api.core.layer.weights
+import org.jetbrains.letsPlot.Figure
 
 internal val FILTER_LAYERS_PERMUTATION = intArrayOf(1, 0, 2, 3)
 

visualization/src/jvmMain/kotlin/org/jetbrains/kotlinx/dl/visualization/letsplot/PlotDefinition.kt

@@ -5,11 +5,11 @@
 
 package org.jetbrains.kotlinx.dl.visualization.letsplot
 
-import jetbrains.letsPlot.geom.geomRaster
-import jetbrains.letsPlot.intern.Scale
-import jetbrains.letsPlot.scale.scaleFillGrey
-import jetbrains.letsPlot.scale.scaleFillHue
-import jetbrains.letsPlot.theme
+import org.jetbrains.letsPlot.geom.geomRaster
+import org.jetbrains.letsPlot.intern.Scale
+import org.jetbrains.letsPlot.scale.scaleFillGrey
+import org.jetbrains.letsPlot.scale.scaleFillHue
+import org.jetbrains.letsPlot.themes.theme
 
 /**
  * PlotFeature represents the filling options for plots that defines its color scale.
@@ -30,6 +30,9 @@ class PlotFeature(val scale: Scale) {
 
 internal val FEATURE_MAP_THEME =
     geomRaster(showLegend = false) +
-            theme().axisTitleBlank()
-                .axisTextBlank()
-                .axisTicksBlank()
+            theme(
+                axisTitle = "blank",
+                axisText = "blank",
+                axisTicks = "blank"
+            )
+

visualization/src/jvmMain/kotlin/org/jetbrains/kotlinx/dl/visualization/letsplot/PlotGeneric.kt

@@ -5,12 +5,12 @@
 
 package org.jetbrains.kotlinx.dl.visualization.letsplot
 
-import jetbrains.letsPlot.Figure
-import jetbrains.letsPlot.geom.geomPath
-import jetbrains.letsPlot.gggrid
-import jetbrains.letsPlot.intern.Plot
-import jetbrains.letsPlot.label.ggtitle
-import jetbrains.letsPlot.letsPlot
+import org.jetbrains.letsPlot.Figure
+import org.jetbrains.letsPlot.geom.geomPath
+import org.jetbrains.letsPlot.gggrid
+import org.jetbrains.letsPlot.intern.Plot
+import org.jetbrains.letsPlot.label.ggtitle
+import org.jetbrains.letsPlot.letsPlot
 import org.jetbrains.kotlinx.dl.api.core.FloatData
 import org.jetbrains.kotlinx.dl.api.core.floats
 import org.jetbrains.kotlinx.dl.dataset.Dataset
@@ -19,16 +19,16 @@ import kotlin.math.max
 import kotlin.math.roundToInt
 
 /**
- * Column plot arranges the given iterable of plots in specified number of columns and
+ * Column plot arranges the given iterable of plots in a specified number of columns and
  * creates a single figure from all given plots
  *
- * @param plots that are arranged into single figure
+ * @param plots these are arranged into a single figure
  * @param columns specifies the number of columns in which the plots are arranged
- * @param imageSize is a height and width of the single plot in returned plots figure
+ * @param imageSize is a height and width of the single plot in a returned plots figure
  * @return a [Figure] with all given plots
  */
 fun columnPlot(plots: Iterable<Plot>, columns: Int, imageSize: Int): Figure =
-    gggrid(plots, columns, imageSize, imageSize, fit = true)
+    gggrid(plots, columns)
 
 /**
  * Create a tile plot with weights from specified function `f(x, y)` that specifies the
@@ -66,8 +66,10 @@ fun xyPlot(imageSize: Int, plotFeature: PlotFeature, f: (Int, Int) -> Float): Pl
     xyPlot(imageSize, imageSize, plotFeature, f)
 
 /**
- * Create a [xyPlot] for image data given as array of the following intensities of the
- * plot tiles. Function intended to use with the inputs images from some [Dataset] for
+ * Create a [xyPlot] for image data given as an array of the following intensities of the
+ * plot tiles.
+ *
+ * Function intended to use it with the input images from some [Dataset] for
  * model as it offers to plot extra label that the specified image is labeled by (and
  * additionally supports plotting some predicted label when model prediction is given)
  *
@@ -105,8 +107,8 @@ fun flattenImagePlot(
  * cut from the beginning or its end because there may be extra noises that disturbs visualization.
  *
  * @param wavFile to read sound data from
- * @param beginDrop part of data to drop from begin from range [0, 1]
- * @param endDrop part of data to drop from end from range [0, 1]
+ * @param beginDrop part of data to drop from beginning from range [0, 1]
+ * @param endDrop part of data to drop from an end from range [0, 1]
  * @return [Plot] representing the amplitude of sound of given [WavFile]
  */
 fun soundPlot(