I want to know how to store the values of the complete loop output into a single dataframe in R. For example,
for(i in unique(x$id)){
.
.
.
y=output of one iteration}
At the end of each iteration, I am getting the output in y. But I want to store output of all iterations into y. How do I do that in R?
You can do this simply by
y <- NULL;
for (i in unique(x$id))
{
tmp <- [output of one iteration]
y <- rbind(y, tmp)
}
You can begin with y as an empty data.frame
as in: y <- data.frame()
. Then bind the rows to this data.frame at the end of each iteration as in: y <- rbind.data.frame(y, [output of one interation])
. But you can also make this a little more tight by wrapping it in an lapply
and do.call
as in:
y <- do.call(rbind.data.frame,
lapply(unique(x$id),
function(i){
...;
return([output of one iteration])}))
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