how to vectrorized this code?

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

Answer 1

[Jan]

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);

Answer 2

[KL]

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

[Jan]

+1 for the optimal creation of denp.