surf won't display zeros in the last row?

Question

Erik 2013-7-18

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/82499-surf-won-t-display-zeros-in-the-last-row

I wanted to visualize binary vectors (of length 15) in black and white, so I wrote the following code to utilize surf:

vector = ones(1,15);
black = [1,5,14,15];
vector(black) = zeros(1,length(black));
fig_handle = figure;
   surf([vector; vector]')
   axis([1,2,1,16])
   set(gca,'XTick',[])
   set(gca,'XTickLabel',[])
   set(gca,'YTick',[2,4,6,8,10,12,14])
   set(gca,'YTickLabel',{'2','4','6','8','10','12','14'})
   caxis([0 1])
   colormap gray
   view(0,270)

It works exactly as I want as long as "black" doesn't contain 15. When it does, no matter what I try, the fifteenth entry in the image remains white.

Suggestions? Thanks.

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Answer 1

Chad Gilbert 2013-7-18

1
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https://ww2.mathworks.cn/matlabcentral/answers/82499-surf-won-t-display-zeros-in-the-last-row#answer_92170

在 MATLAB Online 中打开

The surf command is plotting from 1 to 15. If you want to show the width of the 15th block, you'll need to supply data up to 16. Changing your surf line to:

surf([1 2],1:16,[[vector; vector]'; [0 0]])

made your plot work for me. Also, if you want to create a 2D plot, as you are here, you can use pcolor instead of surf.