Splitting an array up

Hello,

i have a 64x92690 EEG dataset that i want to split into 40 parts of 64x2048.

As 2048 times 40 isen't 92690, i've been having trouble with the reshape function.

C = num2cell(reshape(x, 2048, 64, 1); 

The excess amount of data i dont really care about.

Any suggestions would help

Thanks in advaced!

[Tim Johansson]

Thanks to all that answered!

i ended up using

x = x(:,1:40*2048)

to simply change the data length and then use reshape, as that is a function im familliar with

Answer 1

[Stephan]

use this before reshaping - it discards all data, you dont care about:

x = x(:,1:40*2048)

[Tim Johansson]

Thanks!

no idea why i didnt think of this myself

Answer 2

[Stephen23]

Just use mat2cell, no need for reshape:

>> M = rand(64,92690); % fake data
>> N = 2048;
>> S = size(M);
>> V = repmat(N,1,fix(S(2)/N));
>> C = mat2cell(M,S(1),[V,mod(S(2),N)]);

Answer 3

[Rik]

You can modify the row indices you feed to mat2cell:

data=rand(64,92690);%generate random data
div=2048;

c=div*ones(1,ceil(size(data,2)/div));
c(end)=c(end)-(sum(c)-size(data,2));%trim last block
split=mat2cell(data,size(data,1),c);

%split is a 1x46 cell array, with the last cell containing fewer elements if the data doesn't fit