Creating a vector from a set of coordinates
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Joe Cousins
on 20 Aug 2021
Commented: Fangjun Jiang
on 28 Mar 2022
If I have a set of coordinates of:
x = [10.1, 5.4, 7.3, ...];
y = [2.3, 7.4, 8.8, ...];
How can I create a single vector that assigns each point to an integer such that index = [1 2 3 ...]. E.g. the point with index 1 has the coordinates of x(1), y(1)
Appreciate any help.
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Accepted Answer
Bjorn Gustavsson
on 20 Aug 2021
If you do:
r = [x(:),y(:)]; % (:) forms column-vectors of any-dimensional array.
Then you will find:
p1 = r(1,:)
HTH
2 Comments
Sean Ivan Roxas
on 28 Mar 2022
If I have N number of x and y coordinates, how do I index each pair of coorditnates from 1 to N and store these indices in a vector?
Fangjun Jiang
on 28 Mar 2022
There is no need to "store the indices". length(x), numel(x) or size(x) could return the size information if that is what you want.
More Answers (1)
Fangjun Jiang
on 20 Aug 2021
You mean like this? There is really no need to do this. Please explain the need.
x = [10.1, 5.4, 7.3];
y = [2.3, 7.4, 8.8];
index=[x;y]';
index(1,:)
ans =
10.1000 2.3000
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