Esmail -
Esmail Bonakdarian wrote:
Hello, I have the following task I'd like to accomplish:
A file contains 5 columns of data (several hundred rows), let's call
them a, b, c, d and e (ie these are their column headers)
Are these 5 vectors of data stored in a data.frame? I assume so.
I also have a set of definitions, e.g.,
f = a + b
g = a * 3
h = c + d
etc.
I would like to write out a new .rda file that contains columns
a b c d e f g h etc.
I.e. , the original data plus new columns (with headers and data).
Example,
test <- data.frame(a = 1:10, b = 2:11, c = 3:12)
test2 <- transform(test, d = 2*a + b, e = 3*c)
save(test2, file = "test2.Rdata")
Does this help?
Best,
Erik Iverson
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