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Hi I've a huge file and i want to import only the last 100 rows from that file. How can we do that using read.csv() or any alternative?
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How to read a CSV file in R? In this section you will learn how to import a CSV file in R with the read.csv and read.csv2 functions. You can see the basic syntax of the functions with the most common arguments in the following code block. For additional details remember to type ?read.csv or ?read.csv2.
In this article, we are going to see how to read CSV file and select specific rows and columns in R Programming Language. To import a CSV file into the R environment we need to use a pre-defined function called read.csv (). Pass filename.csv as a parameter within quotations.
CSV (Comma Separated Values) file contains list of data which separated from comma (,).To import csv file R uses read.csv () or read.csv2 () function. Both function are almost same as to the read.table () function.
The following table summarizes the three main default arguments: “.” In order to load a CSV file in R with the default arguments, you can pass the file as string to the corresponding function.
The package R.utils has a function called countLines(). You could do:
l2keep <- 10
nL <- countLines("your.csv")
df <- read.csv("your.csv", header=FALSE, skip=nL-l2keep)
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