how can i convert a string to a number (without using the str2num function) so if the string represents a number the value is 1? (otherwise the value is 0)...

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Zaza on 23 Nov 2012

for example:

st = '23487';

r = 1;

(also '00023487' is acceptable or any number of leading zeros).

but

st = '-4e';

r = 0;

Daniel Shub on 23 Nov 2012

I am closing this question. Please edit it to include what you have tried so far.

Arthur on 23 Nov 2012

r = ~isnan(str2double(st));

Azzi Abdelmalek on 23 Nov 2012

                            a='1.3125';
                           
                            r=numel(regexp(a,'[0-9.]'))==numel(a)

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