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Variable poshidstates have 4 possible values(0,1,2,3). Everytime, poshidstates has to select 1 value out of this four.In this below code, i=100,j=500. Because of below mentioned code part , my program run more than 8 hour instead of just 1 hour(I have to call this code for 600 batches and each batch for 50 times). how can i replace this?
val_vect=[0 1 2 3]; for i=1:numcases; for j=1:numhid; prob=[poshidprobs0(i,j),poshidprobs1(i,j),poshidprobs2(i,j),poshidprobs3(i,j)]; K=find(mnrnd(1,prob)==1); poshidstate(i,j)=val_vect(K); end end
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Ok, now I see why it takes so long. You're repeating that calculation 30,000 times.
But seeing what you're doing, this might be faster:
temp = rand(100, 500); poshidstate = (temp > poshidprobs0) + (temp > (poshidprobs0 + poshidprobs1)) + (temp > (poshidprobs0 + poshidprobs1 + poshidprobs2));