Command line - Awk command for Windows

Question

I have a CSV file with millions of rows. I would like to open a connection to the file and filter unnecessary rows before opening it in R. To detail, I would like to import every 30th row starting at the second row.

I am operating on a Windows machine. I know the following command achieves the desired result on an Apple; however, it doesn't work on my Windows machine.

awk 'BEGIN{i=0}{i++;if (i%30==2) print $1}' < test.csv

In R, if I ran this code on an Apple, I would get the desired result:

write.csv(1:100000, file = "test.csv")
file.pipe <- pipe("awk 'BEGIN{i=0}{i++;if (i%30==2) print $1}' < test.csv")
res <- read.csv(file.pipe)

Clearly, I know nothing about Windows CLI, so could someone translate this awk command to Windows language for me and possibly explain how the translation achieves the desired result?

Thanks in advance!

UPDATE:

So I have downloaded Git and have successfully been able to complete this task using Git command line, but I need to implement it in R because I have to do this task on thousands of files. Anyone know how to make R run this command through Git?

Answer 1

write.csv(1:100000, file = "test.csv")
file.pipe <- pipe("awk \"BEGIN{i=0}{i++;if (i%30==2) print $1}\" test.csv")
res <- read.csv(file.pipe)

On windows the programline of awk need to be surrounded by double quotes. They are escaped because of the other double quotes on the same line.

Also the '<' before the input file is not needed (an I doubt that it is needed on an Apple.)