CODEWITHSUNDEEP
rdataframerpy2
Niek de Klein
Niek de Klein

Reputation: 8824

How to change column names of a dataframe using rpy2

I want to do the equivalent of this R code:

m2 <- cbind(1,2)
colnames(m2) <- c("x","Y")

When I do 

import rpy2.robjects as R
m2 = R.r['cbind'](1,2)
R.r['colnames'](m2) = R.StrVector(['x','y'])

I get this error:

SyntaxError: can't assign to function call

I tried 

>>> m2 = R.r['colnames'](m2, R.StrVector(['x','y']))
>>> print m2

[1] "x1" "y2"

And

>>> params = {'do.NULL':False}
>>> m2 = R.r['colnames'](R.StrVector(['x','y']), m2, **params)
>>> print m2

[1] "11" "21"

Which both don't give the result that I want. So how can I use colnames to change the column names of a dataframe?

Upvotes: 4

Views: 1293

Answers (1)

Niek de Klein
Niek de Klein

Reputation: 8824

If anyone wants to know, the answer is:

m2.colnames = R.StrVector(['x','y'])

Upvotes: 12

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