How to create an empty R vector to add new items?

Question

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?

Answer 1

Initializing an empty vector in R can be done in multiple ways.

Perhaps the most basic is to use vector() or array()

> vector(mode='numeric', length=0)

numeric(0)

> array(data=0, dim=0)

numeric(0)

You can change the data type by changing the input of the 'mode' or 'data' arguments (the default for both is a logical data type).