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Blank histogram plot window

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Kevin
Kevin 2012-6-26
Hello,
I have a matrix full of data. I am interested in plotting a histogram of one column of said data. The number of rows in the data is 195,104. This minimum and maximum of the data series are -8.8317e+181 and Infinity, respectively.
Whenever I attempt to plot a histogram of the results, the plot window appears to be empty. Is there a way to properly plot this data? I am not necessarily interested in the outlier values, but more so in the range of -20 to 20. I have tried to limit the x-axis to this range, but the plot sill appears to be empty.
Thank you,
Kevin
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Image Analyst
Image Analyst 2012-6-27
It could be that there were lots of outliers - more than any valid values so the y range is huge, compressing all your histogram bars vertically. You may have needed to set ylim() also, in addition to xlim(). But actually, I tlawren's answer better.

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tlawren
tlawren 2012-6-26
If you are not interested in outliers (data outside of [-20,20]), then set all outliers to NaN's. Something like the following should work.
M(abs(M) > 20) = NaN;
hist(M(:,col));
where M is your data matrix and col is the column you want to plot.
Inf's will cause empty histograms.
  2 个评论
Kevin
Kevin 2012-6-26
Sorry, what does M represent in this case?
tlawren
tlawren 2012-6-26
M is your data matrix.

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