Why do I need to divide by 12 in the second line to make it equal to line 1?
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year_avg = mean(sum(sum(sum(dl,1),2),3),4);
year_avg= mean(sum(dl(:)))/12;
4 个评论
Basil C.
2018-7-4
If I'm not wrong you don't need to use mean because the output of
(sum(sum(sum(dl,1),2),3),4) and
sum(dl(:))
is a single number and not a vector.
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Image Analyst
2018-7-4
dl is a 4-D array. Think of it as a 3-D volumetric chunk of data, and there are 12 of them, like 12 blocks.
Now, what exactly do you want to do with those 12 blocks?
Average each block so that you have 12 averages - an average over all elements in each block?
Or an average over all possible elements over all 12 blocks so that you have only one average? If so, try this:
year_avg = mean(dl(:));
7 个评论
Image Analyst
2018-7-6
And you can't read it in and save just a few years worth of data in a new .mat file??? OK, whatever. Failing having some data to work with all I can say is that the code should work.
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