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How to write a row of a matrix using if statement?

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Heya :)
Heya :) 2020-11-7
回答： dpb 2020-11-7
I have a Matrix M :-
M= (A B)
A=1+x1+y1+x1y1
and
B=1+x2+y2+x2y2
How to write the B using if statement? Below is my code where i write A but don't know how to continue with B. Please help.
M=zeros([100,10]);
for i=1:100
for j=1:20
if j==1
M(i,j)=1;
elseif j==2
M(i,j)=x(i);
elseif j==3
M(i,j)=y(i);
elseif j==4
M(i,j)=x(i)*y(i);
After this how to add B?

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采纳的回答

dpb
dpb 2020-11-7
A=[ones(size(x1) x1 y1 x1.*y1];
B=[ones(size(x2) x2 y2 x2.*y2];
M=[A B];
Of course, numel(x1)==numel(x2) or all goes boom!

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