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From: John on 28 Jun 2010 18:39
how do I use STR2NUM to turn a 10000x6 character array that looks like:

#NAME?
#NAME?
#NAME?
:
:
#NAME?

into a 10000x1 Matrix that looks like:

NaN
NaN
NaN
:
:
NaN


Thanks for the help!
From: Matt Fig on 28 Jun 2010 18:52
Do you want the numeric value NaN? Why not just create a nan array the same size as your character array?

G = repmat('#NAME?',10,1); % A character array
G = nan(size(G,1),1)
From: dpb on 28 Jun 2010 18:56
John wrote:
> how do I use STR2NUM to turn a 10000x6 character array that looks like:
>
> #NAME?
> #NAME?
> #NAME?
> :
> :
> #NAME?
>
> into a 10000x1 Matrix that looks like:
>
> NaN
> NaN
> NaN
> :
> :
> NaN
>
>
> Thanks for the help!

Can't mix numeric and the character ":" in a matrix, best you could do
is a cell array or character substitution in the existing array.
Unless, of course you convert the ":" to some other numeric value, too.

Then, str2double() would work I think ... no, it shortcircuits after
first NaN result.

This would do as a kluge, maybe...
b=[];
for idx=1:size(a,1)
if strcmp(a(idx),':')
b(idx)=0
else
b(idx)=str2double(idx);
end
end

W/ the newer bsxfun or cellfun one could undoubtedly do more than can w/
my old release to vectorize something

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