Scatter not ignoring NaN in image

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H ZETT M
H ZETT M 2017-8-1
评论： Guillaume 2017-9-23
Hey everyone, I need your help for a short moment. I used "scatter" to plot the following image.
I am quite happy with the image, but there is one problem. The data that I circled are NaN, but they simply get displayed as the lowest value by the scatter function. I tried to change the colorbar into ignoring NaN or making them invisible, but this did not work. Do you know a way to make the NaN values invisible (or simply remove them ?). The matrices I used to create this image are 11x11.
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H ZETT M
H ZETT M 2017-8-1
Hey, thank you for trying to help me. So I wrote some wrong stuff in the question (super tired). So my "code" is
scatter(alpha,beta,500,distance,'filled')
alpha and beta are both vectors with 121 entries (is this the right word ?). distance is also a vector with 121 entries and contains the NaNs. I used 500 for the size. I am currently working with matlab 2015b.
H ZETT M
H ZETT M 2017-8-1
Oh well, I just figured out, that simply removing the NaNs while removing the entries from alpha and beta works fine. Thank you for your help anyway.

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Guillaume
Guillaume 2017-8-1
As mentioned, the NaNs are correctly ignored in R2017a. I don't have R2015b installed anymore to test. You can easily work around the issue by removing the NaNs yourself:
nonans = ~isnan(distance);
scatter(alpha(nonans), beta(nonans), 500, distance(nonans), 'filled')

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Muhammad RSMY
Muhammad RSMY 2017-9-23
Data(isnan(Data))= 0;
idx = find(Data);
[X, Y] = ind2sub(size(Data), idx);
pointsize = 40;
scatter(X(:), Y(:), , pointsize, Data(idx),'square','filled');
colormap jet
colorbar
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Guillaume
Guillaume 2017-9-23
Not sure why you're answering this 2 months after the question has been asked, particularly without any explanation.
Data(isnan(Data))= 0;
idx = find(Data);
[X, Y] = ind2sub(size(Data), idx);
Well, that's a very convoluted way of simply doing
[row, col] = find(~isnan(Data));
Note that conventionally row = Y and col = X.

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