Hello,

I am trying to think of a way to make my for loop quicker. It has occurred to me that I could parallelise the commands in the loops and then bring them back together at the end. Is there such a thing in matlab or am I overcomplicating everything?

My MWE is:

`for kx = 1:length(w) for ky = 1:length(w) %These could be linearised`

for kkx = 1:length(w) for kky = 1:length(w) for freq_sign_ansatz = 1:2 for freq_sign_test = 1:2 [pqf, v1qf, v2qf, pw1f, pw2f, v1w1f, v1w2f, v2w1f, v2w2f] = Convection_basis(kx,ky,kkx,kky,w, freq_ansatz, freq_test); pq_freq(freq_sign_ansatz, freq_sign_test) = pqf(kx,ky,kkx,kky,freq_ansatz, freq_test); v1w1_freq(freq_sign_ansatz, freq_sign_test) = v1w1f(kx,ky,kkx,kky,freq_ansatz, freq_test); v1w2_freq(freq_sign_ansatz, freq_sign_test) = v1w2f(kx,ky,kkx,kky,freq_ansatz, freq_test); v2w1_freq(freq_sign_ansatz, freq_sign_test) = v2w1f(kx,ky,kkx,kky,freq_ansatz, freq_test); v2w2_freq(freq_sign_ansatz, freq_sign_test) = v2w2f(kx,ky,kkx,kky,freq_ansatz, freq_test); pw1_freq(freq_sign_ansatz, freq_sign_test) = pw1f(kx,ky,kkx,kky,freq_ansatz, freq_test); pw2_freq(freq_sign_ansatz, freq_sign_test) = pw2f(kx,ky,kkx,kky,freq_ansatz, freq_test); v1q_freq(freq_sign_ansatz, freq_sign_test) = v1qf(kx,ky,kkx,kky,freq_ansatz, freq_test); v2q_freq(freq_sign_ansatz, freq_sign_test) = v2qf(kx,ky,kkx,kky,freq_ansatz, freq_test); end end index = [(kx - 1) * Length_Wavenumbers + ky, (kkx - 1) * Length_Wavenumbers + kky]; if w(kkx) == w(kx) && w(kx) == 0 && (w(kky) == w(ky) && w(kky) == 0) && zero_counter == 0 zero_counter = 1; zero_entries(zero_counter) = {index}; end pq{index(1), index(2)} = pq_freq; %pd_dxw

v1w1{index(1), index(2)} = v1w1_freq; %pd_dxw v1w2{index(1), index(2)} = v1w2_freq; %pd_dxw v2w1{index(1), index(2)} = v2w1_freq; %pd_dxw v2w2{index(1), index(2)} = v2w2_freq; %pd_dxw pw1{index(1), index(2)} = pw1_freq; %pd_dxw pw2{index(1), index(2)} = pw2_freq; %pd_dxw v1q{index(1), index(2)} = v1q_freq; %vd_dxq

v2q{index(1), index(2)} = v2q_freq; %vd_dxq end end endend

Clearly here I could linearise some of the for loops through combinations of kx,ky,kkx,kky but I was interested whether there is a way of parallelising it as each pw1 etc are square matrices which are independent of each other before I combine them into a cell.

I am new to the way of parallelising things.

## Best Answer