
hi there,

I have a dataframe in the shape vA1, vA2,..., vA11, vB1, vB2,..., VB11,......., VP1, VP2,...., VP11 (so 16 times a sequence of 11 variables)
I am trying to build a double loop so that i can apply the function (i-1)*v(i) to the first 10 variables, then the same for the next 10 variables, etc... 16 times.

I have tried the following with no luck:

iscores<-list()
for (j in seq(1,166,11)) 
  {
  for (i in j:(j+10))
    {iscores[[i-j+1]]=(i-j)*data[[i-j+1]]
    }
  }

any suggestion...?

many thanks,

Christel
 		 	   		  
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