MATLAB Functions

Number to string conversion

str = num2str(A)
str = num2str(A,precision)
str = num2str(A,format)

Description

The num2str function converts numbers to their string representations. This function is useful for labeling and titling plots with numeric values.

str = num2str(a)

converts array A into a string representation str with roughly four digits of precision and an exponent if required.

str = num2str(a,precision)

converts the array A into a string representation str with maximum precision specified by precision. Argument
precision specifies the number of digits the output string is to contain. The default is four.

str = num2str(A,format)

converts array A using the supplied format. By default, this is '%11.4g', which signifies four significant digits in exponential or fixed-point notation, whichever is shorter. (See fprintf for format string details).

Examples

num2str(pi) is 3.142.

num2str(eps) is 2.22e-16.

num2str(magic(2)) produces the string matrix

1  3
4  2