[R-sig-eco] Recode several variables with conditions in a data frame

[Bret Collier]

Manuel,
Something like this should work for your example.

xx=data.frame(x=c(2, 10), y=c(2, 0))
xx[xx!=0]=1
xx
   x y
1 1 1
2 1 0

Bret

On 7/3/2012 8:12 PM, Manuel Spínola wrote:
> Dear list members,
>
> I want to recode a data frame but do it for several variables at the same
> time.  I want to give all the values > or equal than 1 a value of 1 and all
> the remaining values (0) keep in 0.
>
> data.frame: newdf
>
> var1 var2 var3 var4
> A       1      0     4
> B       3      2     1
> C       0      5     1
>
> My real data frame has several more variables.
>
> I am using the recode function from the epicalc package:
>
>> recode(vars=newdf[, 2:4], old.value= newdf[, 2:4] >= 1, new.value=1)
>
> Error en recode.default(vars = newdf[, 2:4], old.value = newdf[, 2:4] >=  :
>    objeto '.data' no encontrado
>
> I guess I am not setting the condition in a proper way.
>
> Best,
>
> Manuel
>
>
>
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