[Rd] Median

José Fernández Menéndez pepejunior at gmail.com
Tue May 8 20:58:30 CEST 2007


i don't understand very well but
apply(your_data_frame, 1,median) calculates the median of every row of
your data frame
apply(your_data_frame, 2, median) calculates the median  of every column

2007/5/8, Jose Sierra <jose.sierra at integromics.com>:
> Hello.
>
> I need calculate the median of several column of a data.frame, in a new
> column of this data frame, but the median operator only calculate from a
> vector.
>
> I have made a functionc that calculate the median but it is very slow.
> Are there any method in any package to calculate this?
>
> Best regards.
> Jose Sierra.
>
>            A                        B                        C
> -0.01678042      -0.0003354948     -0.0003354948
>  0.17320485       0.2359448911      0.4884204711
> -0.76066019      -0.6024409891     -0.5814788340
> -0.04365426      -0.0060560612     -0.0025470274
>  0.01885735       0.0027792718      0.0184081858
> -0.07275884      -0.0371542622     -0.0315041630
>   0.05740122       0.0814235514      0.0468193512
>  -0.05404834      -0.0590145580      0.0489612929
>  -0.28197518      -0.1899247807     -0.2089076920
>  -0.02465713      -0.2222512947     -0.2688619668
>
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