How to multiply some columns in matrix by scalar

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Emma Kuttler
Emma Kuttler 2022-3-25
编辑： David Hill 2022-3-25
I have a matrix with 12 columns. I want to multiply all columns except the first two by 100 and leave the first two the same, then output all this into a new matrix. How do i do this?
railwayarcsBIG = railwayarcs(:,2:12)*100;
% this code does not return the first two columns, it eliminates them and
% only does the scalar multiplication

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回答（1 个）

David Hill
David Hill 2022-3-25
编辑：David Hill 2022-3-25
railwayarcsBIG=railwayarcs;
railwayarcsBIG(:,3:12)=railwayarcsBIG(:,3:12)*100;

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