# i need to convert a string to a num without using the "str2num" function but in the final answer i have some undesired spaces. how can i remove them?

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Zaza on 24 Nov 2012
st = '23487';
x = double(st);
y = x-48;
y = 2 3 4 8 7
i want this in "normal" format of "23487"...
##### 2 CommentsShowHide 1 older comment
Matt Fig on 24 Nov 2012
Edited: Matt Fig on 24 Nov 2012
^Or so one would hope...
Here is how to do it without the str2num function:
N = str2double('1234')

Azzi Abdelmalek on 24 Nov 2012
Edited: Azzi Abdelmalek on 24 Nov 2012
st = '14523'
x = double(st)
y = sum((x-48).*10.^(numel(st)-1:-1:0))
Zaza on 24 Nov 2012
of course! represent '23487' as 2*10^4+3*10^3+4*10^2+8*10^1+7*10^0... i should've think better on this one. thanks Azzi :)

Andrei Bobrov on 24 Nov 2012
Edited: Andrei Bobrov on 26 Nov 2012
out = (st-'0')*10.^(numel(st)-1:-1:0)';
or from Cody
out = polyval(st-'0',10);

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