How to repeat monthly data over several years?

Question

HA 2019-12-8

回答： Thiago Henrique Gomes Lobato 2019-12-8

Hello,

I have a potentially simple question.

I have a spatial matrix A=144x192x1x12. The fourth dimension is time in months.

I would like to make a matrix where I have 30 years of repeated data B=144x192x1x360.

I have tried something along the lines of-

for i=1:12;
B(:,:,:,i:12:360)=A(:,:,:,i);
end

But of course this did not work due to differnce sizes of each side.

How would I achieve this simple copying of each year for 30 years?

Thank you,

Holly

Answer 1

Matlab has a function for concatenating values in different dimensions, you could solve your problem like this:

A = randn(144,192,1,12);
B = [];
for i=1:30
B = cat(4,B,A);
end
size(B)
ans =
   144   192     1   360