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Averaging and then using grpstats in Matlab?

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Sonisa
Sonisa on 5 Jun 2016
Commented: Sonisa on 6 Jun 2016
I have NDVI reading for 5 times in same spot, I first want to use means of 5 values and then using grpstats as function to get the mean value on the basis of Date, Pasture, and Patches. I use NDVImean = grpstats([date Pasture Patches NDVI],[date,Pasture,Patches],'nanmean'); but since the data, Pasture and Patches are 495*1 while NDVI is 2351*1. Could anyone help me please?
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Image Analyst
Image Analyst on 5 Jun 2016
If you take the mean of 5 in the 2351 NVDI vector, you'll have 2351/5 = 470.2. How exactly are those means supposed to match up with the 495 elements in the other vectors? The lengths don't match.
Sonisa
Sonisa on 6 Jun 2016
Yes, that is true. But it should have 2475 data file, some were missing so it came around 2351. We collect the data on same day and time since some of the data were not good we have to eradicate it. so is there anyway that I can make the elements of both vector working for each other?

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