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Densematrix

docs/reference/classes/densematrix.md

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<a name="DenseMatrix"></a>

DenseMatrix

Dense Matrix implementation. This type implements an efficient Array format for dense matrices.

<a name="DenseMatrix+storage"></a>

denseMatrix.storage() ⇒ <code>string</code>

Get the storage format used by the matrix.

Usage:

js
const format = matrix.storage()                   // retrieve storage format

Kind: instance method of <code>DenseMatrix</code> Returns: <code>string</code> - The storage format.
<a name="DenseMatrix+datatype"></a>

denseMatrix.datatype() ⇒ <code>string</code>

Get the datatype of the data stored in the matrix.

Usage:

js
const format = matrix.datatype()                   // retrieve matrix datatype

Kind: instance method of <code>DenseMatrix</code> Returns: <code>string</code> - The datatype.
<a name="DenseMatrix+create"></a>

denseMatrix.create(data, [datatype])

Create a new DenseMatrix

Kind: instance method of <code>DenseMatrix</code>

ParamType
data<code>Array</code>
[datatype]<code>string</code>

<a name="DenseMatrix+subset"></a>

denseMatrix.subset(index, [replacement], [defaultValue])

Get a subset of the matrix, or replace a subset of the matrix.

Usage:

js
const subset = matrix.subset(index)               // retrieve subset
const value = matrix.subset(index, replacement)   // replace subset

Kind: instance method of <code>DenseMatrix</code>

ParamTypeDefaultDescription
index<code>Index</code>
[replacement]<code>Array</code> | <code>DenseMatrix</code>| <code>*</code>
[defaultValue]<code>*</code><code>0</code>Default value, filled in on new entries when the matrix is resized. If not provided, new matrix elements will be filled with zeros.

<a name="DenseMatrix+get"></a>

denseMatrix.get(index) ⇒ <code>*</code>

Get a single element from the matrix.

Kind: instance method of <code>DenseMatrix</code> Returns: <code>*</code> - value

ParamTypeDescription
index<code>Array.<number></code>Zero-based index

<a name="DenseMatrix+set"></a>

denseMatrix.set(index, value, [defaultValue]) ⇒ <code>DenseMatrix</code>

Replace a single element in the matrix.

Kind: instance method of <code>DenseMatrix</code> Returns: <code>DenseMatrix</code>- self

ParamTypeDescription
index<code>Array.<number></code>Zero-based index
value<code>*</code>
[defaultValue]<code>*</code>Default value, filled in on new entries when the matrix is resized. If not provided, new matrix elements will be left undefined.

<a name="DenseMatrix+resize"></a>

denseMatrix.resize(size, [defaultValue], [copy]) ⇒ <code>Matrix</code>

Resize the matrix to the given size. Returns a copy of the matrix when copy=true, otherwise return the matrix itself (resize in place).

Kind: instance method of <code>DenseMatrix</code> Returns: <code>Matrix</code> - The resized matrix

ParamTypeDefaultDescription
size<code>Array.<number></code>The new size the matrix should have.
[defaultValue]<code>*</code><code>0</code>Default value, filled in on new entries. If not provided, the matrix elements will be filled with zeros.
[copy]<code>boolean</code>Return a resized copy of the matrix

<a name="DenseMatrix+clone"></a>

denseMatrix.clone() ⇒ <code>DenseMatrix</code>

Create a clone of the matrix

Kind: instance method of <code>DenseMatrix</code> Returns: <code>DenseMatrix</code>- clone
<a name="DenseMatrix+size"></a>

denseMatrix.size() ⇒ <code>Array.<number></code>

Retrieve the size of the matrix.

Kind: instance method of <code>DenseMatrix</code> Returns: <code>Array.<number></code> - size
<a name="DenseMatrix+map"></a>

denseMatrix.map(callback) ⇒ <code>DenseMatrix</code>

Create a new matrix with the results of the callback function executed on each entry of the matrix.

Kind: instance method of <code>DenseMatrix</code> Returns: <code>DenseMatrix</code>- matrix

ParamTypeDescription
callback<code>function</code>The callback function is invoked with three parameters: the value of the element, the index of the element, and the Matrix being traversed.

<a name="DenseMatrix+forEach"></a>

denseMatrix.forEach(callback)

Execute a callback function on each entry of the matrix.

Kind: instance method of <code>DenseMatrix</code>

ParamTypeDescription
callback<code>function</code>The callback function is invoked with three parameters: the value of the element, the index of the element, and the Matrix being traversed.

<a name="DenseMatrix+toArray"></a>

denseMatrix.toArray() ⇒ <code>Array</code>

Create an Array with a copy of the data of the DenseMatrix

Kind: instance method of <code>DenseMatrix</code> Returns: <code>Array</code> - array
<a name="DenseMatrix+valueOf"></a>

denseMatrix.valueOf() ⇒ <code>Array</code>

Get the primitive value of the DenseMatrix: a multidimensional array

Kind: instance method of <code>DenseMatrix</code> Returns: <code>Array</code> - array
<a name="DenseMatrix+format"></a>

denseMatrix.format([options]) ⇒ <code>string</code>

Get a string representation of the matrix, with optional formatting options.

Kind: instance method of <code>DenseMatrix</code> Returns: <code>string</code> - str

ParamTypeDescription
[options]<code>Object</code> | <code>number</code> | <code>function</code>Formatting options. See lib/utils/number:format for a description of the available options.

<a name="DenseMatrix+toString"></a>

denseMatrix.toString() ⇒ <code>string</code>

Get a string representation of the matrix

Kind: instance method of <code>DenseMatrix</code> Returns: <code>string</code> - str
<a name="DenseMatrix+toJSON"></a>

denseMatrix.toJSON() ⇒ <code>Object</code>

Get a JSON representation of the matrix

Kind: instance method of <code>DenseMatrix</code> <a name="DenseMatrix+diagonal"></a>

denseMatrix.diagonal([k]) ⇒ <code>Array</code>

Get the kth Matrix diagonal.

Kind: instance method of <code>DenseMatrix</code> Returns: <code>Array</code> - The array vector with the diagonal values.

ParamTypeDefaultDescription
[k]<code>number</code> | <code>BigNumber</code><code>0</code>The kth diagonal where the vector will retrieved.

<a name="DenseMatrix+swapRows"></a>

denseMatrix.swapRows(i, j) ⇒ <code>Matrix</code>

Swap rows i and j in Matrix.

Kind: instance method of <code>DenseMatrix</code> Returns: <code>Matrix</code> - The matrix reference

ParamTypeDescription
i<code>number</code>Matrix row index 1
j<code>number</code>Matrix row index 2

<a name="DenseMatrix.diagonal"></a>

DenseMatrix.diagonal(size, value, [k], [defaultValue]) ⇒ <code>DenseMatrix</code>

Create a diagonal matrix.

Kind: static method of <code>DenseMatrix</code>

ParamTypeDefaultDescription
size<code>Array</code>The matrix size.
value<code>number</code> | <code>Array</code>The values for the diagonal.
[k]<code>number</code> | <code>BigNumber</code><code>0</code>The kth diagonal where the vector will be filled in.
[defaultValue]<code>number</code>The default value for non-diagonal

<a name="DenseMatrix.fromJSON"></a>

DenseMatrix.fromJSON(json) ⇒ <code>DenseMatrix</code>

Generate a matrix from a JSON object

Kind: static method of <code>DenseMatrix</code>

ParamTypeDescription
json<code>Object</code>An object structured like {"mathjs": "DenseMatrix", data: [], size: []}, where mathjs is optional

<a name="DenseMatrix.preprocess"></a>

DenseMatrix.preprocess(data) ⇒ <code>Array</code>

Preprocess data, which can be an Array or DenseMatrix with nested Arrays and Matrices. Replaces all nested Matrices with Arrays

Kind: static method of <code>DenseMatrix</code> Returns: <code>Array</code> - data

ParamType
data<code>Array</code>