[R] Replacement Value

dila radi
2014-04-08T03:46:02Z

Hi all,

I have problem on how to replace value. I have this kind of data set:

structure(list(A = c(0, 12.6, 10.1, 8.1, 14.4, 0, 0, 0, 0, 0.5,
12.9, 25.9, 49, 0, 0, 0, 0, 0, 7.8), B = c(0, 0, 9.1, 9.3, 1.5,
1, 1, 1, 1.7, 6, 0, 0, 0, 1.7, 3.8, 0, 0, 0, 1), C = c(1, 1,
9.100000004, 9.299999999, 1.5, 1, 1, 1, 1.7, 5.999999999, 1,
1, 1, 1.7, 3.800000001, 1, 1, 1, 1)), .Names = c("A", "B",
"C"
), row.names = c(NA, 19L), class = "data.frame")

The problem is the value under variable 'C'.   It supposed to be like
this:

1) When value is '0' under variable 'B', the next value under
variable 'C'
also should be '0'.

2) When value is '1' under variable 'B', there is no changes for
values
under variable 'C'.

How do I achieved this by fulfill these two conditions? Thank you so much.


Regards,
Dila

	[[alternative HTML version deleted]]