creating a matrix from different sized arrays

Hello,

i have some test data to analyse, the data is in arrays of varying size but the names of the arrays are all similar eg; mmXXXgX (where X are numbers relating to a specific test situation)

Basically everything is taking ages to do because i can't seam to make a matrix out of it, i also don't want to cut down any of them as the amount of data varies significantly from one to the next. i was thinking about extending them with 0s but i was worried it would mess up the results if it tried to Fourier transform them.

The latest thing i have been trying involves a matrix of their names as text strings but this doesn't seem to work either.

I have never used this forum before so please let me know if i have missed anything out.

this is the code from the last attempt (it was a bit hopeful i didn't really expect it to work):

a=['mm100g0','mm155g0','mm195g0','mm215g0','mm235g0','mm295g0'
    'mm100g1','mm155g1','mm195g1','mm215g1','mm235g1','mm295g1'];
peakv=zeros(size(a));
for r=1:2
    for c=1:6
        peakv(r,c)=fd(a(r,c));
    end
end

fd() is just a function that returns a single value (the peak voltage)

Any help would be greatly appreciated, thank you

Michael

Answer 1

[Andrei Bobrov]

x = [100 155 195 215 235 295];
y = 0:1;
[ii jj] = ndgrid(y,x);
a = eval(['reshape({',sprintf('mm%dg%d,',[jj(:),ii(:)]'),'},size(jj))']);

or:

a={mm100g0,mm155g0,mm195g0,mm215g0,mm235g0,mm295g0;mm100g1,mm155g1,mm195g1,mm215g1,mm235g1,mm295g1}

% example of use

peakv = cellfun(@fd,a);

Answer 2

[Sean de Wolski]

FAQ

This should get you started, ask us for any clarifications.