feat:node-modules

node_modules/mathjs/lib/esm/function/matrix/column.js

@@ -0,0 +1,59 @@
+import { factory } from '../../utils/factory.js';
+import { isMatrix } from '../../utils/is.js';
+import { clone } from '../../utils/object.js';
+import { validateIndex } from '../../utils/array.js';
+var name = 'column';
+var dependencies = ['typed', 'Index', 'matrix', 'range'];
+export var createColumn = /* #__PURE__ */factory(name, dependencies, _ref => {
+  var {
+    typed,
+    Index,
+    matrix,
+    range
+  } = _ref;
+  /**
+   * Return a column from a Matrix.
+   *
+   * Syntax:
+   *
+   *     math.column(value, index)
+   *
+   * Example:
+   *
+   *     // get a column
+   *     const d = [[1, 2], [3, 4]]
+   *     math.column(d, 1) // returns [[2], [4]]
+   *
+   * See also:
+   *
+   *     row
+   *
+   * @param {Array | Matrix } value   An array or matrix
+   * @param {number} column           The index of the column
+   * @return {Array | Matrix}         The retrieved column
+   */
+  return typed(name, {
+    'Matrix, number': _column,
+    'Array, number': function Array_number(value, column) {
+      return _column(matrix(clone(value)), column).valueOf();
+    }
+  });
+
+  /**
+   * Retrieve a column of a matrix
+   * @param {Matrix } value  A matrix
+   * @param {number} column  The index of the column
+   * @return {Matrix}        The retrieved column
+   */
+  function _column(value, column) {
+    // check dimensions
+    if (value.size().length !== 2) {
+      throw new Error('Only two dimensional matrix is supported');
+    }
+    validateIndex(column, value.size()[1]);
+    var rowRange = range(0, value.size()[0]);
+    var index = new Index(rowRange, column);
+    var result = value.subset(index);
+    return isMatrix(result) ? result : matrix([[result]]);
+  }
+});