Number to String Conversion in MATLAB (num2str)

This page provides MATLAB source code demonstrating number to string conversion using the num2str function. The num2str function converts a numerical matrix into its string representation.

num2str Function Syntax

The general syntax for the num2str function is:

output = num2str(input)

There are also variations with added parameters:

• output = num2str(input, N), where N specifies the desired digits of precision.
• output = num2str(input, format), where 'format' is a string defining the desired formatting.

Example

Let’s look at a simple example:

input = randn(3,3)
output=num2str(input,5)

In this example, randn(3,3) generates a 3x3 matrix of normally distributed random numbers. The num2str function then converts this matrix into a string representation, with 5 digits of precision. The MATLAB output would be:

output =

    '0.17464    -0.58832     0.11393
    -0.18671      2.1832      1.0668
     0.72579    -0.1364    0.059281'