Function Counter of digits

I am new to Matlab and I want to make a function called digit_counter that takes the name of a text file as input and returns the number of digits (i.e., any of the characters, 0-to-9) that the file contains. Any help?

Answer 1

[Stephen23]

Assuming only text files, then here is one line to solve your task:

 nnz(isstrprop(fileread(...),'digit'))

just replace ... with the filename. If you really want it as a function:

 digit_counter = @(name)nnz(isstrprop(fileread(name),'digit'));

and call it like this:

digit_counter('test.txt');

Answer 2

[Azzi Abdelmalek]

name='w1o4rd12'
out=numel(regexp(name,'\d+'))

%or

name='w1o4rd12'
a=name-'0'
idx=a>=0 & a<=9
out=nnz(idx)