numjs - npm Package Compare versions

Comparing version 0.14.2 to 0.15.0

package.json

 {
   "name": "numjs",
-  "version": "0.14.2",
+  "version": "0.15.0",
   "description": "Like NumPy, in JavaScript",
@@ -58,3 +58,3 @@ "main": "src/index.js",
     "preversion": "grunt test && git ci dist -m 'bump version' --allow-empty ",
-    "postversion": "npm publish"
+    "postversion": "npm publish && grunt doc"
   },
@@ -61,0 +61,0 @@ "repository": {

README.md

@@ -633,2 +633,24 @@ [![Build Status](https://travis-ci.org/nicolaspanel/numjs.png)](https://travis-ci.org/nicolaspanel/numjs) [![npm version](https://badge.fury.io/js/numjs.svg)](https://badge.fury.io/js/numjs) [![Bower version](https://badge.fury.io/bo/numjs.svg)](https://badge.fury.io/bo/numjs) [![Built with Grunt](https://cdn.gruntjs.com/builtwith.svg)](http://gruntjs.com/)
 
+### Other utils
+`rot90`
+```js
+> m = nj.array([[1,2],[3,4]], 'int')
+> m
+array([[1, 2],
+       [3, 4]])
+> nj.rot90(m)
+array([[2, 4],
+       [1, 3]])
+> nj.rot90(m, 2)
+array([[4, 3],
+       [2, 1]])
+> m = nj.arange(8).reshape([2,2,2])
+> nj.rot90(m, 1, [1,2])
+array([[[1, 3],
+        [0, 2]],
+      [[5, 7],
+       [4, 6]]])
+```
+
+
 ## Images manipulation
@@ -635,0 +657,0 @@ __NumJs__’s comes with powerful functions for image processing. Theses function are located in `nj.images` module.

src/index.js

@@ -717,2 +717,67 @@ 'use strict';
 
+
+/**
+ * Reverse the order of elements in an array along the given axis.
+ * The shape of the array is preserved, but the elements are reordered.
+ * New in version 0.15.0.
+ * @param {Array|NdArray} m Input array.
+ * @param {number} axis Axis in array, which entries are reversed.
+ * @return {NdArray} A view of `m` with the entries of axis reversed.  Since a view is returned, this operation is done in constant time.
+ */
+function flip(m, axis) {
+  m = NdArray.new(m);
+  var indexer = ones(m.ndim).tolist();
+  var cleanaxis = axis;
+  while (cleanaxis < 0) {
+    cleanaxis += m.ndim;
+  }
+  if (indexer[cleanaxis] === undefined) {
+    throw new errors.ValueError('axis=' + axis + 'invalid for the ' + m.ndim + '-dimensional input array');
+  }
+  indexer[cleanaxis] = -1;
+  return m.step.apply(m, indexer);
+}
+
+/**
+ * Rotate an array by 90 degrees in the plane specified by axes.
+ * Rotation direction is from the first towards the second axis.
+ * New in version 0.15.0.
+ * @param {Array|NdArray} m array_like
+ * @param {number} [k=1] Number of times the array is rotated by 90 degrees.
+ * @param {Array|NdArray} [axes=(0,1)] The array is rotated in the plane defined by the axes. Axes must be different.
+ * @return {NdArray} A rotated view of m.
+ */
+function rot90 (m, k, axes) {
+  k = k || 1;
+  while (k < 0) {
+    k += 4;
+  }
+  k = k % 4;
+  m = NdArray.new(m);
+  axes = NdArray.new(axes || [0, 1]);
+  if (axes.shape.length !== 1 || axes.shape[0] !== 2) {
+    throw new errors.ValueError('len(axes) must be 2');
+  }
+  axes = axes.tolist();
+  if (axes[0] === axes[1] || abs(axes[0] - axes[1]) === m.ndim) {
+    throw new errors.ValueError("Axes must be different.")
+  }
+
+  if (k === 0) {
+    return m;
+  }
+  if (k === 2) {
+    return flip(flip(m, axes[0]), axes[1]);
+  }
+  var axesList = arange(m.ndim).tolist();
+  var keep = axesList[axes[0]];
+  axesList[axes[0]] = axesList[axes[1]];
+  axesList[axes[1]] = keep;
+  if (k === 1) {
+    return transpose(flip(m, axes[1]), axesList);
+  } else {
+     return flip(transpose(m, axesList), axes[1]);
+  }
+}
+
 module.exports = {
@@ -730,2 +795,3 @@ config: CONF,
   flatten: flatten,
+  flip: flip,
   random: random,
@@ -772,2 +838,3 @@ softmax: softmax,
   stack: stack,
+  rot90: rot90,
   int8: function (array) { return NdArray.new(array, 'int8'); },
@@ -774,0 +841,0 @@ uint8: function (array) { return NdArray.new(array, 'uint8'); },

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Improved metrics

Total package byte prevSize

718207

increased by0.32%

Lines of code

2734

increased by2.36%

Number of lines in readme file

728

increased by3.12%

Worsened metrics

Number of package files

35

decreased by-2.78%

No dependency changes