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how to vectrorized this code?

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Siddhesh Karbhari
Siddhesh Karbhari 2017-10-9
编辑： Jan 2017-10-9
close all
clear all
clc
tic;
i=1;
for k=1:1:10;
for a=1:1:10;
nump(i,:) =k*a;
denp(i,:) =[1 a 0];
i=i+1;
end
end

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采纳的回答

Jan
Jan 2017-10-9
编辑：Jan 2017-10-9
nump = (1:10) .* (1:10).'; % Auto-Expand >= Matlab R2016b
For older Matlab versions:
nump = bsxfun(@times, (1:10), (1:10).');
denp from KL's solution is perfect already. This is 2 microseconds(!) faster on my computer, but less nice:
denp = zeros(100, 3);
denp(:, 1) = 1;
denp(:, 2) = repmat((1:10)', 10, 1);

更多回答（1 个）

KL
KL 2017-10-9
nump = cell2mat(arrayfun(@(x) x:x:x*10,1:10,'uni',0))';
denp = [ones(100,1) repmat((1:10)',10,1), zeros(100,1)];

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