how to concatenate different mat files of massive sizes in one matfile?

i am trying to concatenate 6 matfiles of size 50 by 262144 each in to one matfile. the resultant/concatenated matfile is

of size 50 by 1572864, but it should be of size 50 by (262144)^6 which is equal to 50 by 3.245185536584267e+32.

Please tell me what to do. below is my code for concatenation

load Fv_ROI_BDIP

load Fv_ROI_Bilateral

load Fv_ROI_CDF

load Fv_ROI_GradOrient

load Fv_ROI_HOG

load Fv_ROI_LBP

load Fv_ROI_RGLBP

load Fv_ROI_SparceDist

load Fv_ROI_SSGM

% Concatenate

 X = [ Fv_ROI_BDIP   Fv_ROI_Bilateral  Fv_ROI_CDF  Fv_ROI_GradOrient  Fv_ROI_LBP  Fv_ROI_SSGM];

 %Save to new mat file

 save('Final_fv.mat', 'X')

Answer 1

[Walter Roberson]

50 by (262144)^6 of the smallest kind of data (uint8 for example) would require approximately 16 Giga Yottabytes of storage.

You can't afford it.

[maida]

what should i do then?

first reduce dimensions by PCA.

Please guide me in detail :/ :/

[Walter Roberson]

Why do you think this information should all be stored? Are you thinking of doing an exhaustive search of combinations? There is no way you could process such a thing in a reasonable amount of time.