# diag (MathScript RT Module Function)

LabVIEW 2012 MathScript RT Module Help

Edition Date: June 2012

Part Number: 373123C-01

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Owning Class: linalgebra

Requires: MathScript RT Module

c = diag(a)

c = diag(a, b)

## Description

Computes a diagonal matrix or the diagonal of a matrix. diag(a, 0) is equivalent to diag(a).

Examples

## Inputs

Name Description
a Specifies a vector or matrix of any data type.
b Specifies a diagonal of a. b is an integer.

## Outputs

Name Description
c Returns a diagonal matrix or the diagonal of a matrix. c is a vector or matrix. If a is a matrix, diag(a) returns a column vector containing the diagonal of a and diag(a, b) returns a column vector containing the bth diagonal of a. If a is a vector of length n, diag(a, b) is a square matrix of size n+abs(b) with a bth diagonal determined by a.

## Details

The following table lists the support characteristics of this function.

 Supported in the LabVIEW Run-Time Engine Yes Supported on RT targets Yes Suitable for bounded execution times on RT Yes

## Examples

A = [1, 0, 0; 0, 2, 0; 0, 0, 3]
C = diag(A)