feat:node-modules

node_modules/mathjs/lib/cjs/function/arithmetic/log1p.js

@@ -0,0 +1,87 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createLog1p = void 0;
+var _factory = require("../../utils/factory.js");
+var _collection = require("../../utils/collection.js");
+var _number = require("../../utils/number.js");
+const name = 'log1p';
+const dependencies = ['typed', 'config', 'divideScalar', 'log', 'Complex'];
+const createLog1p = exports.createLog1p = /* #__PURE__ */(0, _factory.factory)(name, dependencies, _ref => {
+  let {
+    typed,
+    config,
+    divideScalar,
+    log,
+    Complex
+  } = _ref;
+  /**
+   * Calculate the logarithm of a `value+1`.
+   *
+   * For matrices, the function is evaluated element wise.
+   *
+   * Syntax:
+   *
+   *    math.log1p(x)
+   *    math.log1p(x, base)
+   *
+   * Examples:
+   *
+   *    math.log1p(2.5)                 // returns 1.252762968495368
+   *    math.exp(math.log1p(1.4))       // returns 2.4
+   *
+   *    math.pow(10, 4)                 // returns 10000
+   *    math.log1p(9999, 10)            // returns 4
+   *    math.log1p(9999) / math.log(10) // returns 4
+   *
+   * See also:
+   *
+   *    exp, log, log2, log10
+   *
+   * @param {number | BigNumber | Complex | Array | Matrix} x
+   *            Value for which to calculate the logarithm of `x+1`.
+   * @param {number | BigNumber | Complex} [base=e]
+   *            Optional base for the logarithm. If not provided, the natural
+   *            logarithm of `x+1` is calculated.
+   * @return {number | BigNumber | Complex | Array | Matrix}
+   *            Returns the logarithm of `x+1`
+   */
+  return typed(name, {
+    number: function (x) {
+      if (x >= -1 || config.predictable) {
+        return (0, _number.log1p)(x);
+      } else {
+        // negative value -> complex value computation
+        return _log1pComplex(new Complex(x, 0));
+      }
+    },
+    Complex: _log1pComplex,
+    BigNumber: function (x) {
+      const y = x.plus(1);
+      if (!y.isNegative() || config.predictable) {
+        return y.ln();
+      } else {
+        // downgrade to number, return Complex valued result
+        return _log1pComplex(new Complex(x.toNumber(), 0));
+      }
+    },
+    'Array | Matrix': typed.referToSelf(self => x => (0, _collection.deepMap)(x, self)),
+    'any, any': typed.referToSelf(self => (x, base) => {
+      // calculate logarithm for a specified base, log1p(x, base)
+      return divideScalar(self(x), log(base));
+    })
+  });
+
+  /**
+   * Calculate the natural logarithm of a complex number + 1
+   * @param {Complex} x
+   * @returns {Complex}
+   * @private
+   */
+  function _log1pComplex(x) {
+    const xRe1p = x.re + 1;
+    return new Complex(Math.log(Math.sqrt(xRe1p * xRe1p + x.im * x.im)), Math.atan2(x.im, xRe1p));
+  }
+});