feat:node-modules

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

@@ -0,0 +1,88 @@
+import { factory } from '../../utils/factory.js';
+var name = 'matrixFromColumns';
+var dependencies = ['typed', 'matrix', 'flatten', 'size'];
+export var createMatrixFromColumns = /* #__PURE__ */factory(name, dependencies, _ref => {
+  var {
+    typed,
+    matrix,
+    flatten,
+    size
+  } = _ref;
+  /**
+   * Create a dense matrix from vectors as individual columns.
+   * If you pass row vectors, they will be transposed (but not conjugated!)
+   *
+   * Syntax:
+   *
+   *    math.matrixFromColumns(...arr)
+   *    math.matrixFromColumns(col1, col2)
+   *    math.matrixFromColumns(col1, col2, col3)
+   *
+   * Examples:
+   *
+   *    math.matrixFromColumns([1, 2, 3], [[4],[5],[6]])
+   *    math.matrixFromColumns(...vectors)
+   *
+   * See also:
+   *
+   *    matrix, matrixFromRows, matrixFromFunction, zeros
+   *
+   * @param {... Array | Matrix} cols Multiple columns
+   * @return { number[][] | Matrix } if at least one of the arguments is an array, an array will be returned
+   */
+  return typed(name, {
+    '...Array': function Array(arr) {
+      return _createArray(arr);
+    },
+    '...Matrix': function Matrix(arr) {
+      return matrix(_createArray(arr.map(m => m.toArray())));
+    }
+
+    // TODO implement this properly for SparseMatrix
+  });
+  function _createArray(arr) {
+    if (arr.length === 0) throw new TypeError('At least one column is needed to construct a matrix.');
+    var N = checkVectorTypeAndReturnLength(arr[0]);
+
+    // create an array with empty rows
+    var result = [];
+    for (var i = 0; i < N; i++) {
+      result[i] = [];
+    }
+
+    // loop columns
+    for (var col of arr) {
+      var colLength = checkVectorTypeAndReturnLength(col);
+      if (colLength !== N) {
+        throw new TypeError('The vectors had different length: ' + (N | 0) + ' ≠ ' + (colLength | 0));
+      }
+      var f = flatten(col);
+
+      // push a value to each row
+      for (var _i = 0; _i < N; _i++) {
+        result[_i].push(f[_i]);
+      }
+    }
+    return result;
+  }
+  function checkVectorTypeAndReturnLength(vec) {
+    var s = size(vec);
+    if (s.length === 1) {
+      // 1D vector
+      return s[0];
+    } else if (s.length === 2) {
+      // 2D vector
+      if (s[0] === 1) {
+        // row vector
+        return s[1];
+      } else if (s[1] === 1) {
+        // col vector
+        return s[0];
+      } else {
+        throw new TypeError('At least one of the arguments is not a vector.');
+      }
+    } else {
+      throw new TypeError('Only one- or two-dimensional vectors are supported.');
+    }
+  }
+});