Store an indexed matrix to later recall

Hello. I have a vector (1,12100) of indexed matrices [64 3] which I would like to recall specific indexed sets. All values are numbers. Tried dlmwrite but it causes my PC freeze and tried variations of fprintf like below but get errors.

fprintf(fileID,'%.6f\t\r\n',{X});

Any ideas on how best to file these sets for later recall? I would like to recall a [64 3] set via its indexed number which is from 1 to 12,100.

Thank you. --Allen

Answer 1

[Walter Roberson]

You can save() them as a cell array. If you really need to be able to restore individual members without reading the rest, then you can use matFile() with a cell array

You should also consider saving as a 3 dimensional array, 64 x 3 x 12100

[AR]

Walter, Could I use this 3D Array, X={[64x3] [64x3] [64x3] [64x3] etc}, in fprintf somehow to save in a txt file? Thx, Allen

[Walter Roberson]

Yes; what format would you want? Is there to be three columns on each line? Is there to be some kind of marker between indices?

If it can just be (64*12100) rows of 3 columns then assuming you are starting with a cell array

temp1 = YourCell(:);
temp2 = vertcat(temp1{:});
fprintf(fid, '%.6f\t%6f\t%.6f\r\n', temp2.' );   %note .'

If you are starting with a 64 x 3 x 12100 array then

temp2 = permute(YourArray, [2 1 3]);
fprintf(fid, '%.6f\t%6f\t%.6f\r\n', temp2 );   %no .'