How to store the array in a for loop?

Question

SUSHMA MB 2015-11-23

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/256917-how-to-store-the-array-in-a-for-loop

评论： SUSHMA MB 2015-11-24

I have written a code as mentioned below, its a for loop in which i want to store the array of each polygon, but im only able to save the last polygon values.

function [x, y, dt] = simple_polygon(numSides,numpoly)
  if numSides < 3
      x = [];
      y = [];
      dt = DelaunayTri();
      return
  end
    oldState = warning('off', 'MATLAB:TriRep:PtsNotInTriWarnId');
    valueOfX = zeros(100,100);
    valueOfY = zeros(100,100);
    figure
for i = 1 : numpoly
    fudge = ceil(numSides/10);
    x = rand(numSides+fudge, 1);
    y = rand(numSides+fudge, 1);
    dt = DelaunayTri(x, y);
    boundaryEdges = freeBoundary(dt);
    numEdges = size(boundaryEdges, 1);
    while numEdges ~= numSides
        if numEdges > numSides
            triIndex = vertexAttachments(dt, boundaryEdges(:,1));
            triIndex = triIndex(randperm(numel(triIndex)));
            keep = (cellfun('size', triIndex, 2) ~= 1);
        end
        if (numEdges < numSides) || all(keep)
            triIndex = edgeAttachments(dt, boundaryEdges);
            triIndex = triIndex(randperm(numel(triIndex)));
            triPoints = dt([triIndex{:}], :);
            keep = all(ismember(triPoints, boundaryEdges(:,1)), 2);
        end
        if all(keep)
            warning('Couldn''t achieve desired number of sides!');
            break
        end
        triPoints = dt.Triangulation;
        triPoints(triIndex{find(~keep, 1)}, :) = [];
        dt = TriRep(triPoints, x, y);
        boundaryEdges = freeBoundary(dt);
        numEdges = size(boundaryEdges, 1);
    end       
    boundaryEdges = [boundaryEdges(:,1); boundaryEdges(1,1)];
    x = dt.X(boundaryEdges, 1);
    y = dt.X(boundaryEdges, 2);
    valueOfX(i) = x;
    valueOfY(i)= y;
    warning(oldState);
    hold all
 patch(x,y,'r-')
end
end

In the code, in "valueofX and valueofY", i tried to store the array, but its showing error. Please help me to store the array for each polygon.

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Answer 1

Stalin Samuel 2015-11-23

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/256917-how-to-store-the-array-in-a-for-loop#answer_200840

编辑：Stalin Samuel 2015-11-23

in your function you return the values of x,y
function [x, y, dt] = simple_polygon(numSides,numpoly)
the array values are stored in valueOfX,valueOfY
So you need to change your function like-----> function [valueOfX, valueOfY, dt] = simple_polygon(numSides,numpoly)