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How to get values from dataframe's column conditional on other column

Yuri Volchik 
Hi to all members of this list,

I'm quite a novice to R and was wondering if there is a more elegant
way to solve a following problem:
Suppose we have a dataframe
  X     Y
.12   TRUE
-.24  TRUE
..     ...
.34   FALSE

i.e. two (or more columns) with data and we want to get vector of X
values conditional on Y values (say only X's when Y=TRUE).
Of course it is possible to do it by looping through the whole
dataframe, i was wondering if there is a a more elegant solution to
this in R?

Thread (6 messages)

Yuri Volchik How to get values from dataframe's column conditional on other column Jun 13 Dirk Eddelbuettel How to get values from dataframe's column conditional on other column Jun 13 Gabor Grothendieck How to get values from dataframe's column conditional on other column Jun 13 Gabor Grothendieck How to get values from dataframe's column conditional on other column Jun 13 Gabor Grothendieck How to get values from dataframe's column conditional on other column Jun 13 Rob Steele How to get values from dataframe's column conditional on other column Jun 13