How to create an empty R vector to add new items

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I want to use R in Python, as provided by the module Rpy2. I notice that R has very convenient [] operations by which you can extract the specific columns or lines. How could I achieve such a function by Python scripts?

My idea is to create an R vector and add those wanted elements into this vector so that the final vector is the same as that in R. I created a seq(), but it seems that it has an initial digit 1, so the final result would always start with the digit 1, which is not what I want. So, is there a better way to do this?

rpy2 vector r python
7 Answers

As pointed out by Brani, vector() is a solution, e.g.

newVector <- vector(mode = "numeric", length = 50)

will return a vector named "newVector" with 50 "0"'s as initial values. It is also fairly common to just add the new scalar to an existing vector to arrive at an expanded vector, e.g.

aVector <- c(aVector, newScalar)

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