How to store data after 2 forloops?

I've got this code:

for welke_pp=1:5 %for 5 subjects
  for i_testen = 1:5 %for 5 measurements
      RHEE = data_stair_rise(welke_pp,i_testen).VideoSignals(:, strcmp('RHEE', data_stair_rise(welke_pp,i_testen).VideoSignals_headers),3); %extract data

RHEE (Right-Heel-marker) is this type: 359x1 double. I want to store RHEE for each subject and each measurment.

When I put RHEE(welke_pp,i_testen) = ... It doesn't work: "Subscripted assignment dimension mismatch." When I use these brackets {} it also doesn't work (but I also don't want to create a cell, so it doesn't matter). Help?

Answer 1

[Guillaume]

Try:

RHEE = zeros(5, 5, 359);
for welke_pp=1:5 %for 5 subjects
   for i_testen = 1:5 %for 5 measurements
      RHEE(welke_pp, i_testen, :) = ...
   end
end

RHEE will be a 3D array.

[Sam]

I can't use zeros(5,5,359) because RHEE always has a different length...

[Guillaume]

Then you can't store it in a matrix and have to use a cell array:

   RHEE{welke_pp, i_testen} = ... %no need to predeclare

or an array of structures with only one field.

RHEE(welke_pp, i_testen).data = ...

A cell array would make more sense / be easier to manipulate.