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creating a new column in a matrix using 'if condition"

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Milan Kumar
Milan Kumar 2019-4-26
编辑： Stephen23 2019-4-27
On the following matrix:
Untitled.png
I am using the following code which is not giving the right response.
if Reg1(:,3)==0
Reg1(:,10)=0;
else
Reg1(:,10)=a1-b1*Reg1(:,3)+Reg1(:,6);
end
Cannot figure out the issue.
The output is
Untitled.png

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采纳的回答

Stephen23
Stephen23 2019-4-27
编辑：Stephen23 2019-4-27
IF will not help you in this situation.
You need to use indexing, e.g.:
Reg1(:,10) = a1-b1*Reg1(:,3) + Reg1(:,6);
idx = Reg1(:,3)==0;
Reg1(idx,10) = 0

更多回答（1 个）

Matt J
Matt J 2019-4-26
编辑：Matt J 2019-4-26
if all( Reg1(:,3)==0 )
Reg1(:,10)=0;
else
Reg1(:,10)=a1-b1*Reg1(:,3)+Reg1(:,6);
end

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