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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