how to change string back to number in matlab

To change a string back to a number in MATLAB, you can use the str2double function. This function converts a string to double precision (float) number.

Here's an example demonstrating how to use str2double:

main.m
str = '123.45';    % String representation of number
num = str2double(str);    % Convert string to number

disp(num);    % Display the converted number
152 chars
5 lines

Output:

main.m
123.4500
9 chars
2 lines

Note that if the string cannot be converted to a number, str2double will return NaN (Not-a-Number).

Additionally, there are other conversion functions available in MATLAB such as str2num and str2int depending on the specific type of number you want to convert to.

Hope this helps!