surf plot is only showing grid (not surface)

Question

coconutMocha 2016-6-22

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/291491-surf-plot-is-only-showing-grid-not-surface

回答： Walter Roberson 2016-6-22

I'm using the following code, but not getting a surface plot (rather, only the wiring underneath). Do you know why this might be? Thanks in advance for your help.

        rotation = RotationToRotationStructure_Data(:,1);
        exactK = ScalingToRotationStructure_Data(:,1);
        scale_tx = ScalingToRotationStructure_Data(:,2);
        scale_ty = ScalingToRotationStructure_Data(:,3);
        rot_tx = RotationToRotationStructure_Data(:,2);
        rot_ty = RotationToRotationStructure_Data(:,3);
        scale_ReportX = ScalingToRotationStructure_Data(:,4);
        scale_ReportY = ScalingToRotationStructure_Data(:,5);
        rot_ReportX = RotationToRotationStructure_Data(:,4);
        rot_ReportY = RotationToRotationStructure_Data(:,5);
        nUniquePert = numel(unique(exactK(1:240,1)));
        %expected values
        thetaHat = zeros(2400,1);
        rot_scaleHat = thetaHat;
        for j = 1:length(thetaHat);
            scale_expected_ReportX(j) = exactK(j)*scale_tx(j) + ...
                exactK(j)*scale_ty(j);
            scale_expected_ReportY(j) = -exactK(j)*scale_tx(j) + ...
                exactK(j)*scale_ty(j);
            rot_expected_ReportX(j) = 1*cos(rotation(j))*rot_tx(j) + ...
                1*sin(rotation(j))*rot_ty(j);
            rot_expected_ReportY(j) = -1*sin(rotation(j))*rot_tx(j) + ...
                1*cos(rotation(j))*rot_ty(j);
      scale_goodfit(j) = rmse(scale_expected_ReportX(j) - scale_ReportX(j), scale_expected_ReportY(j) - scale_ReportY(j));
      rot_goodfit(j) = rmse(rot_expected_ReportX(j) - rot_ReportX(j), rot_expected_ReportY(j) - rot_ReportY(j));
        end
          x = repmat(thetaHat, 1, 2); y = repmat(exactK, 1, 2); 
          z = repmat(scale_goodfit',1,2); 
          colormap hsv;
          h = surf(x, y, z);

5 个评论
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coconutMocha 2016-6-22

It's a 2400x7 matrix consisting of experiment variables which change every 8 elements.

KSSV 2016-6-22

Data is needed to plot and debug buddy...

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Answer 1

Walter Roberson 2016-6-22

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/291491-surf-plot-is-only-showing-grid-not-surface#answer_226276

You effectively do not have a surface. Your x is completely 0, and your y appears to be unsorted.

If you truly want an x that is all zero, then I suggest you sort exactK and save it and the sorting order, and also use that sorting order to sort scale_goodfit before constructing your z. surf() the sorted exactK and the corresponding constructed z.