How to exclude some value from raster matrix

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Karolina
Karolina 2015-7-16
评论： Karolina 2015-7-16
I have a raster matrix with float values. I would like to find the minimum, median, mean, and the maximum values of my data, but when I use minA=min(A) I am receiving -1.797693134862316e+308 what represent the pixels with no data. How to exclude this value from my evaluation?

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Image Analyst
Image Analyst 2015-7-16
Reassign bogus values to something else, like 0 or infinity or nan. Make sure it's some value that won't also mess up your max calculation:
A(A<0) = 0;
minA = min(A(:));
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Karolina
Karolina 2015-7-16
Yes, but when I set this value to zero, then the min value will be equal to zero. And also it will have an influence for median evaluation, because zero will be taken into account. I have to exclude this value. Maybe export only the values which are larger than zero into a new raster will help?

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