replacing the for loops Please
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count = 1;
for n = 2: 97
for m = 2:length(time)
for i=3:numApRH
for j=2:numRawRH
for p = 2:numMapPT
PT_load(count, 1) = date=ap{m,1};
PT_load(count, 2) = t=ap{n,2};;
PT_load(count, 3) = raw{j,1};
PT_load(count, 4) = raw{j,3}*ap{m,i};
PT_load(count, 5) = map{p,32};
PT_load(count, 6) = map{p,33};
count = count + 1;
end
end
end
end
end
end
end
end
1 个评论
采纳的回答
If you want to increase the speed, care for pre-allocating PT_load.
Then avoid repeated work inside the loops:
count = 0;
PT_load = zeros(96 * (length(time) - 1) * (numApRH - 2) * ...
(numRawRH - 1) * (numMapPT - 1), 6);
q = zeros(1,6);
for n = 2: 97
q(2) = ap{n,2};
for m = 2:length(time)
q(1) = ap{m,1};
for i = 3:numApRH
ap_mi = ap{m,i};
for j = 2:numRawRH
q(3) = raw{j,1};
q(4) = raw{j,3} * ap_mi;
for p = 2:numMapPT
% ??? PT_load(count, 1) = date=ap{m,1}; ???
% Where does the "date =" come from? It is invalid syntax!
% ??? PT_load(count, 2) = t=ap{n,2};; ???
% Same for "t=" ???
q(5) = map{p,32};
q(6) = map{p,33};
count = count + 1;
PT_load(count, :) = q;
end
end
end
end
end
Ups: There are 3 "end" too much in the code. Please post working code only.
Now compare the speed and decide, if this is still the bottleneck of your code.
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