MATLAB: How to use “save” matlab

fprintfsave

Hi all, i create a very big file in matlab and then i try to write it in a txt file using the fprintf() function. But after a while a message pops up saying that there is not enough memory or sth like that.. How can i save it in the txt file? Can i use the save function of matlab to do that?
thanks. Daniel

Best Answer

for i=1:size(res_tAcc.data,1)
  fprintf(fid, '%f ', res_tAcc.time(i,1)); 
  fprintf(fid, '%f %f %f %f %f %f %f %f %f %f %f %f %f %f %f', ...
          res_tAcc.data(i,1)', res_tAcc.data(i,2)', res_tAcc.data(i,3)', ...
          res_tGyro.data(i,1)', res_tGyro.data(i,2)', ...
  ..
Index exceeds matrix dimensions.
Error in resample2 (line 44) fprintf(fid, '%f %f %f %f %f %f %f %f %f %f %f %f %f %f %f', res_tAcc.data(i,1)', ...
You're running the loop over size(res_tAcc.data,1) but there's no guarantee that the others are necessarily identically the same size -- it appears at least one isn't as large.
Use size() on all the arrays you're wanting to output and ensure they're all at least as long as the one you've use.
BTW, for simplicity, a couple of things -- use repmat to make format strings manageable--
fmt=repmat('%f',1,15);
fprintf(fid,fmt,...
You can find the repeat count programmatically as well to save manual counting.
Also, build the array and output in one pass...
fmt=repmat('%f',1,16);
fprintf(fid,fmt,[res_tAcc.time(:,1)    res_tAcc.data(:,1:3) res_tGyro.data(:,1:3)  ... 
 res_tMagn.data(:,1:3) res_tOr.data(:,1:3)  res_tRotQuatr.data(::3)].');
It would be even simpler and more regularly formatted if used dlmwrite or similar.
ERRATUM:
Also, build the array and output in one pass...
fmt=[repmat('%f',1,16) '\n'];
Forgot to add the newline...
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