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From: Thomas Ponath on 28 Jun 2010 08:47
Hallo,

I loaded measurement data into MATLAB as a simple 'double' number table and naming them after the original file names, indicating measurement parameters.
My script gives me a list of the variable names just as the command
"s = who(variable_list) returns cell array s containing the names of the variables specified in variable_list [...]" (from Matlab help)

Now I want to work with these variables (f.ex. integrate using trapz), without needing to type in their names but loading their names through my variable cell-list 's'.
Is this possible without creating a redundant temporary variable via the command
DATA = eval( s{i,1} ) %(for the i-th variable) ?

Thank you in advance!
From: Steven Lord on 28 Jun 2010 09:15

"Thomas Ponath" <maberlioz(a)googlemail.com> wrote in message
news:i0a5kb$aml$1(a)fred.mathworks.com...
> Hallo,
> I loaded measurement data into MATLAB as a simple 'double' number table
> and naming them after the original file names, indicating measurement
> parameters.

So you created individual variables for each of your files? Don't do
that -- load the data into fields of a struct array instead.

> My script gives me a list of the variable names just as the command "s =
> who(variable_list) returns cell array s containing the names of the
> variables specified in variable_list [...]" (from Matlab help)
>
> Now I want to work with these variables (f.ex. integrate using trapz),
> without needing to type in their names but loading their names through my
> variable cell-list 's'. Is this possible without creating a redundant
> temporary variable via the command DATA = eval( s{i,1} ) %(for
> the i-th variable) ?

If you created individual variables, I think you're stuck with EVAL.

If you created fields in a struct array, use dynamic field names.

S = struct('x', 1:10, 'y', [2 3 5 7]);
myfield = 'x';
plot(S.(myfield))

Also see Q4.6 in the newsgroup FAQ.

--
Steve Lord
slord(a)mathworks.com
comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ
To contact Technical Support use the Contact Us link on
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