mathjs - npm Package Compare versions

Comparing version 0.6.0 to 0.7.0

HISTORY.md

@@ -5,2 +5,18 @@ # math.js history
 
+## 2013-04-20, version 0.7.0
+
+- Implemented method `math.eval`, which uses a readonly parser to evaluate
+  expressions.
+- Implemented method `xgcd` (extended eucledian algorithm). Thanks Bart Kiers.
+- Improved math.format, which now rounds values to a maximum number of digits
+  instead of decimals (default is 5 digits, for example `math.format(math.pi)`
+  returns `3.1416`).
+- Added examples.
+- Changed methods square and cube to evaluate matrices element wise (consistent
+  with all other methods).
+- Changed second parameter of method import to an object with options.
+- Fixed method math.typeof on IE.
+- Minor bug fixes and improvements.
+
+
 ## 2013-04-13, version 0.6.0
@@ -7,0 +23,0 @@

package.json

 {
     "name": "mathjs",
-    "version": "0.6.0",
+    "version": "0.7.0",
     "description": "Math.js is an extensive math library for JavaScript and Node.js. It features real and complex numbers, units, matrices, a large set of mathematical functions, and a flexible expression parser.",
@@ -38,3 +38,3 @@ "author": "Jos de Jong <[e-mail]>",
         "prepublish": "jake",
-        "test": "jake test"
+        "test": "jake test --trace"
     },
@@ -41,0 +41,0 @@ "main": "./math.js",

README.md

@@ -14,8 +14,8 @@ ![math.js](https://raw.github.com/josdejong/mathjs/master/img/mathjs.png)
 - Supports numbers, complex numbers, units, strings, arrays, and matrices.
+- Is compatible with JavaScript’s built-in Math library.
 - Contains a flexible expression parser.
-- Compatible with JavaScript’s built-in Math library.
 - Supports chained operations.
-- A large set of built-in functions and constants.
-- No dependencies. Runs on any JavaScript engine.
-- Easily extensible.
+- Comes with a large set of built-in functions and constants.
+- Has no dependencies. Runs on any JavaScript engine.
+- Is easily extensible.
 
@@ -29,3 +29,7 @@
 
-Or the latest version of math.js can be downloaded from
+Or using [bower](http://twitter.github.io/bower/):
+
+    bower install mathjs
+
+Or by downloading the latest version from
 [mathjs.org](http://mathjs.org/#install_or_download):
@@ -41,4 +45,3 @@
 
-Math.js can be loaded in node.js using `require`, and similarly in the browser
-using [require.js](http://requirejs.org/).
+Load math.js in [node.js](http://nodejs.org/):
 
@@ -69,55 +72,106 @@ ```js
 
-<!-- TODO: Describe how to load using require.js -->
+#### Require.js
 
+Load math.js in the browser using [require.js](http://requirejs.org/):
 
+```js
+require.config({
+    paths: {
+        mathjs: 'path/to/mathjs',
+    }
+});
+require(['mathjs'], function (math) {
+    math.sqrt(-4); // 2i
+});
+```
+
+
 ## Use
 
-Math.js can be used similar to Javascript's built-in Math library.
+Math.js can be used similar to JavaScript's built-in Math library. Besides that,
+math.js can evaluate expressions (see [Expressions](#expressions)) and supports
+chained operations (see [Chained operations](#chained-operations)).
 
+The example code below shows how to use math.js. More examples can be found in the
+[examples directory](https://github.com/josdejong/mathjs/tree/master/examples/).
+
 ```js
+// load math.js
 var math = require('mathjs');
 
-// use methods and types available in the math object
-var a = math.sin(math.pi / 4);  // 0.7071067811865476
-var b = math.pow(a, 2);         // 0.5
+// functions and constants
+math.round(math.e, 3);            // 2.718
+math.atan2(3, -3) / math.pi;      // 0.75
+math.log(1000, 10);               // 3
+math.sqrt(-4);                    // 2i
+math.pow([[-1, 2], [3, 1]], 2);   // [[7, 0], [0, 7]]
 
-var c = math.complex(3, -4);    // 3 - 4i
-math.sqrt(c);                   // 2 - i
+// expressions
+math.eval('1.2 / (2.3 + 0.7)');   // 0.4
+math.eval('5.08 cm in inch');     // 2 inch
+math.eval('sin(45 deg) ^ 2');     // 0.5
+math.eval('9 / 3 + 2i');          // 3 + 2i
+math.eval('det([-1, 2; 3, 1])');  // -7
 
-math.sqrt(-4);                  // 2i
-
-var f = math.unit(60, 'deg');   // 60 deg
-var g = math.cos(f);            // 0.5
+// chained operations
+math.select(3)
+    .add(4)
+    .multiply(2)
+    .done(); // 14
 ```
 
-Operations can be performed using:
 
-- regular function calls
-- chained operations (see [Selector](#selector))
-- expression parsing (see [Parser](#parser))
+## Expressions
 
+Math.js contains a flexible and easy to use expression parser.
+The parser supports all data types, methods and constants available in math.js.
+Expressions can be evaluated in two ways:
+
+- Using the function [`math.eval`](#eval), which uses a read-only parser.
+- Using a more flexible [parser](#parser).
+
+
+### Eval
+
+Math.js comes with a function `math.eval` to evaluate expressions.
+The function `eval` does support all functions, variables, and data types
+available in math.js. Internally, the function `eval` uses a read-only parser.
+The following code demonstrates how to evaluate expressions.
+
 ```js
-// regular function call
-math.subtract(math.add(3, 4), 2);           // 5
+// load math.js
+var math = require('mathjs');
 
-// chained operation
-math.select(3).add(4).subtract(2).done();   // 5
+// evaluate expressions
+var a = math.eval('sqrt(3^2 + 4^2)');   // a = 5
+var b = math.eval('sqrt(-4)');          // b = 2i
+var c = math.eval('2 inch in cm');      // c = 5.08 cm
+var d = math.eval('cos(45 deg)');       // d = 0.7071067811865476
+```
 
-// expression parser
+
+### Parser
+
+The parser of math.js supports all functions, variables, and data types
+available in math.js. Additionally, it supports variable and function
+assignments. A parser can be created by:
+
+```js
 var parser = math.parser();
-parser.eval('3 + 4 - 2');                   // 5
 ```
 
+The parser contains the following methods:
 
-## Parser
+- `eval(expr)`
+  Evaluate an expression.
+- `get(name)`
+  Retrieve a variable or function from the parsers scope.
+- `set(name, value)`
+  Set a variable or function in the parsers scope.
+- `parse(expr)`
+  Parse an expression into a node tree.
+  A node can be evaluated as `node.eval()`.
 
-Math.js contains a flexible and easy to use expression parser.
-The parser supports all data types, methods and constants available in math.js.
-It has a method `eval` to evaluate expressions,
-and `parse` to parse expressions and build a node tree from it.
-The parser supports variable and function definitions.
-Variables and functions can be manipulated using the methods `get` and `set`.
+The following code shows how to create and use a parser.
 
-The following example code shows how to create and use a parser.
-
 ```js
@@ -157,19 +211,10 @@ // load math.js
 
-Available methods:
 
-    var result = parser.eval(expr);    // evaluate an expression
-    var value = parser.get(name);      // retrieve a variable from the parser
-    parser.set(name, value);           // set a variable in the parser
+## Chained operations
 
-    var node = parser.parse(expr);     // parse an expression into a node tree
-    var result = node.eval();          // evaluate a node
-
-
-## Selector
-
 Math.js supports chaining operations by wrapping a value into a `Selector`.
-A selector can be created with the method `math.select(value)`.
+A selector can be created with the function `math.select(value)`.
 All methods available in the math namespace can be executed via the selector.
 The methods will be executed with the selectors value as first argument,
-followed by extra arguments provided by the method call itself.
+followed by extra arguments provided by the function call itself.
 
@@ -180,4 +225,3 @@ ```js
     .subtract(2)
-    .done();
-    // 5
+    .done(); // 5
 
@@ -187,4 +231,3 @@ math.select( [[1, 2], [3, 4]] )
     .multiply(3)
-    .done();
-    // [[24, 6], [9, 12]]
+    .done(); // [[24, 6], [9, 12]]
 ```
@@ -203,7 +246,7 @@
    Get a subselection of the selectors value. Only applicable when
-   the value has a method get, for example when value is a Matrix
+   the value has a function get, for example when value is a Matrix
    or Array.
  - `set(index, replacement)`
    Replace a subselection of the selectors value. Only applicable
-   when the value has a method get, for example when value is a
+   when the value has a function get, for example when value is a
    Matrix or Array.
@@ -417,2 +460,3 @@
 - math.unequal(x)
+- math.xgcd(a, b)
 
@@ -469,2 +513,3 @@ ### Complex
 - math.clone(x)
+- math.eval(expr)
 - math.format([template, ] values)
@@ -490,3 +535,3 @@ - math.import(filename | object, override)
         return 'hello, ' + name + '!';
-    });
+    }
 });
@@ -557,23 +602,6 @@
 
-- Version 0.1.0 (2013-02-18)
-    - Implement all methods and constants available in the built-in Math library
-    - Implement data types Complex and Unit
-- Version 0.2.0 (2013-02-25)
-    - Implement Parser, Scope, Node tree
-    - Implement more methods
-- Version 0.3.0 (2013-03-09)
-    - Implement Workspace
-    - Implement more methods
-- Build a website (2013-03-11)
-- Version 0.4.0 (2013-03-16)
-    - Implement Arrays
-- Version 0.5.0 (2013-04-06)
-    - Implement Matrix and Range
-- Version 0.6.0
-    - Implement chained operations
-- Version 0.7.0
+- Before version 1.0.0:
     - More on matrices
-- Version 1.0.0
+    - Examples and documentation
     - Extensive testing
-    - Examples and documentation
 
@@ -580,0 +608,0 @@

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Improved metrics

Total package byte prevSize

401887

increased by5.27%

Number of package files

13

increased by85.71%

Lines of code

9098

increased by8.84%

Number of lines in readme file

612

increased by4.79%

No dependency changes