Subplot n pcolor matrixes

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Jose Andrés
Jose Andrés 2015-9-20
评论： Jose Andrés 2015-9-21
Hello everyone,
I have to subplot n pcolor matrixes in a 1 x n figure, but I have several problems because I can't set the size of the matrixes in the subplot. All my matrixes have the same size (120 x 120) and I must do it without using the image() function.
Please, could you help me?
Thank you so much.

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Image Analyst
Image Analyst 2015-9-21
Then use imshow(). It's now in base MATLAB and doesn't chop off the last row and last column like pcolor() does.
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Image Analyst
Image Analyst 2015-9-21
Jose: You have floatingpoint data so you need to use the [] option with imshow: imshow(data, []). Now your data will show all the gray levels. Otherwise it expects that all floating point data goes between 0 and 1 and anything more than 1 gets clipped to 1, which it displays as pure white.
Try this code:
subplot(1, 2, 1);
data = 300*rand(4,3);
imshow(data, []);
title('4x3 with imshow', 'FontSize', 25);
subplot(1, 2, 2);
pcolor(data);
title('4x3 with pcolor shows as 3x2', 'FontSize', 25);
Now, how many of the 4 rows appear when you call pcolor? How many of the columns appear when you call pcolor? And how many show up with imshow()?
What do you notice about the aspect ratio of the two methods? Which one displays elements as squares, and which one doesn't?
Jose Andrés
Jose Andrés 2015-9-21
Yes, I have been thinking about what you said me and I think you are right, the imshow([]) method is much more effective. I have done my subplot with the imageshow(data,[]) function and I will show it to my superiors; I think they will like it.
Thank you so much one more time.

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更多回答（1 个）

Walter Roberson
Walter Roberson 2015-9-20
n = length(AllMatrices);
for K = 1 : n
this_ax = subplot(1,n,K);
this_matrix = AllMatrices{K};
pcolor(this_ax, this_matrix);
title(sprintf('Matrix #%d', K));
end
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Walter Roberson
Walter Roberson 2015-9-21
After the pcolor call, add
axis equal
But most of the problem is from trying to crowd too much information in. You should consider using montage()
Jose Andrés
Jose Andrés 2015-9-21
Yes, it worked and it really taught me a lot too, but I am sorry can only choose one answer.
Thank you so much anyway, Walter.

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