What is the best way to store different variables into 1 variable?

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Steve 2019-10-15

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评论： Steve 2019-10-17

fpep.mat

I need to take a bunch of coordinate points that I have stored in a variable, and sort them in groups of the ten closest endpoint triplet groups to each other triplet. Then, I need to store them along with another group of coordinate points that correspond to the central points of each of these triplets. What's the best way to do this? The attached file contains all the (x,y) coordinates for the endpoint triplets (first 6 columns), and the central points (last two columns) Thanks in advance for your help!

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Answer 1

John D'Errico 2019-10-15

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编辑：John D'Errico 2019-10-15

Use a cell array. Or use a srruct. Either can store anything you put into it.

Here, a struct will allow you to store everything with a name attached to each field, so it will be arguably a better choice. And you can have arrays of structs.

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Steve 2019-10-15

编辑：Steve 2019-10-16

在 MATLAB Online 中打开

Thanks so much John. I will definitely use that next. For now, I need to be able to get this code to work, in that I need to store 10 groups of three points which are closest to a source group. Please see below:

close all;
clearvars;
% load('F_points.mat');
load('fpep.mat');
n = 10;
for pt = 1 : 953
        dist = sqrt((fpep(:,7)-fpep(pt,7)).^2 + (fpep(:,8)-fpep(pt,8)).^2); 
        [~, ascendIdx] = sort(dist); 
        xyNearest(pt,:,:) = fpep(ascendIdx(1:n),7:8);
        adirector_x(pt,:,:) = ([fpep(ascendIdx(1:n),1) - xyNearest(pt,:,1)]);
        adirector_y(pt,:,:) = ([fpep(ascendIdx(1:n),2) - xyNearest(pt,:,2)]);
        bdirector_x(pt,:,:) = ([fpep(ascendIdx(1:n),3) - xyNearest(pt,:,1)]);
        bdirector_y(pt,:,:) = ([fpep(ascendIdx(1:n),4) - xyNearest(pt,:,2)]);
        cdirector_x(pt,:,:) = ([fpep(ascendIdx(1:n),5) - xyNearest(pt,:,1)]);
        cdirector_y(pt,:,:) = ([fpep(ascendIdx(1:n),6) - xyNearest(pt,:,2)]);
        ascendIdx(ascendIdx==pt) = [];  %remove the pt point
end
chordx = ([xyNearest(:,:,1) - fpep(:,7)]);
chordy = ([xyNearest(:,:,2) - fpep(:,8)]);
chord = sqrt((chordx).^2 + (chordy).^2);

Walter Roberson 2019-10-16

在 MATLAB Online 中打开

You overwrite ascendIdx each iteration of the loop, so it is not clear why you would bother to do

ascendIdx(ascendIdx==pt) = []; %remove the pt point

It would make more sense if that was just after the sort()

Steve 2019-10-17

Could you give me an example of how you would set up the proper code?

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