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# Obtain matrix with YDIR reverse

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Alejandro Fernández 2020년 8월 4일
댓글: Alejandro Fernández 2020년 8월 4일
Hello good morning, I have a problem to see if anyone can help me.
I have an A matrix of , in the first column are the values of the X axis and in the second column the values of the Y axis, I need to get a B matrix of the same dimensions and identical positions of X and Y in which the data correspond to the process of trafficking the data of A and apply:
figure
scatter(A(:,1),A(:,2),'filled')
set(gca,'YDir','reverse')
So when I create B what is the matrix that i don't know how to create I expect to obtain the same result but without reversing the axis:
figure
scatter(B(:,1),B(:,2),'filled')
set(gca,'YDir','normal')

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### 채택된 답변

Rik 2020년 8월 4일
Since reversing the y-direction is mostly equivalent to flipping the sign:
B=[A(:,1) -A(:,2)];
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Alejandro Fernández 2020년 8월 4일
Yess!!! That works! Thank you so much!

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R2020a

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