[R] applying an operation for several dataframes

[jim holtman]

?get

names <- c('c', 'cc')
for (i in names){
    print(nrow(get(i)))
}


On Sat, Nov 22, 2008 at 4:06 PM, Georg Ehret <georgehret at gmail.com> wrote:
> Dear R community,
>    I am trying to apply a simple operation to several dataframes (e.g.
> nrow) and cannot get the looping to work. My objective is to get an output
> that indicates me the number of rows for every dataframe.
>
>> c
>  V1 V2 V3 V4 V5 V6 V7 V8 V9 V10
> 1  1 11 21 31 41 51 61 71 81  91
> 2  2 12 22 32 42 52 62 72 82  92
> 3  3 13 23 33 43 53 63 73 83  93
> 4  4 14 24 34 44 54 64 74 84  94
> 5  5 15 25 35 45 55 65 75 85  95
>> cc
>   V1 V2 V3 V4 V5 V6 V7 V8 V9 V10
> 1   1 11 21 31 41 51 61 71 81  91
> 2   2 12 22 32 42 52 62 72 82  92
> 3   3 13 23 33 43 53 63 73 83  93
> 4   4 14 24 34 44 54 64 74 84  94
> 5   5 15 25 35 45 55 65 75 85  95
> 6   6 16 26 36 46 56 66 76 86  96
> 7   7 17 27 37 47 57 67 77 87  97
> 8   8 18 28 38 48 58 68 78 88  98
> 9   9 19 29 39 49 59 69 79 89  99
> 10 10 20 30 40 50 60 70 80 90 100
>> names<-c("c","cc")
>> for(i in names){nrow(i)}
>
> Thank you!
> Georg.
> *****************************
> Georg Ehret
> georg at rhone.ch
> Geneva University Hospital
> Switzerland
>
>        [[alternative HTML version deleted]]
>
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>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?