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std


From: turbofib
Subject: std
Date: Fri, 17 May 2019 13:41:30 -0500 (CDT)

hi, look that:


>> vv=media(20:40)
vv =

    433.59
    485.94
    590.62
    632.81
    674.22
    714.45
    769.14
    839.06
    934.77
    932.42
    998.05
   1058.59
   1069.92
   1005.08
    923.44
    835.16
    727.34
    618.36
    471.88
    360.94
    269.53

i want to do std in 5 element:

> std(vv,0,5)
ans =

   0
   0
   0
   0
   0
   0
   0
   0
   0
   0
   0
   0
   0
   0
   0
   0
   0
   0
   0
   0
   0


Why i get this result? All zero




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