[GRASS-user] Error while using variance in r.series function

Monica Buescu monicabuescu1985 at gmail.com
Wed Feb 23 12:37:17 EST 2011


I'm using r.series with variance option and I'm getting values that are not
according to var function in MATLAB or var function in EXCEL.

For average and count the result is exacly the expected but for variance
(e.g. bellow is for a pixel
[     73 116 72 81 75 136 101 112 94 67  ]

I get 532.011 in EXCEL and in MATLAB
and in GRASS i get 478.81

What is happening? Was this already reported?

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