Indicator function in R

If i am able to understand you correctly then you want to make changes into entire data frame,assuming of which i can suggest you to use apply like below, where df is your data frame.

apply(df,2,function(x)ifelse((x>0),1,0))

You can also use if its for only one vector something like below:

x <- c(-2,3,1,0)
y <- ifelse(x>0,1,0)
print(y)
[1] 0 1 1 0 #Output

Hope this helps