How can I extract values from an N x 2 matrix?

Question

RevengeOfTee 2020-1-20

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/501160-how-can-i-extract-values-from-an-n-x-2-matrix

回答： Stijn Haenen 2020-1-20

So I have a user inputting N amount of values into a N x 2 matrix. Like so:

xx = input('Enter x coordinates in the form [0 0]');
yy = input('Enter y coordinates in the form [0 0]');
xp1 = xx';
yp1 = yy';
Cord = [xp1,yp1]

Now, what I want to do is extract each of the x-y coordinates in Cord to create points such as P4 = [cord(4,1),cord(4,2)]. The problem is, since the user is inputting the number of rows, I'm going to have N points and I can't figure out how to make a for loop that can account for all the points that will be created. It's been awhile.

Thank you!

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Answer 1

Stijn Haenen 2020-1-20

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/501160-how-can-i-extract-values-from-an-n-x-2-matrix#answer_411105

在 MATLAB Online 中打开

What about this?:

cord=zeros(1,2);
for i=1:100
    xx = input('Enter x coordinates in the form [0]');
    yy = input('Enter y coordinates in the form [0]');
    
    Cord(i,:) = [xx,yy];
end