To read command line parameters in R script, you can use the “commandArgs()” function. This function returns a character vector of the command line arguments passed to the R script.
Here’s a step-by-step guide on how to read command line parameters from an R script:
Step 1: Create an R script file
# Get command line arguments args <- commandArgs(trailingOnly = TRUE) # Print the arguments cat("Number of arguments:", length(args), "\n") cat("Arguments:", args, "\n")
In this script, the commandArgs(trailingOnly = TRUE) function extracts only the arguments after the script name. The cat() function prints the number of arguments and the arguments themselves.
Step 2: Run the R script with command line parameters
Open the terminal or command prompt, and navigate to the R script file’s directory.
Rscript Pro.R arg1 arg2 arg3
Number of arguments: 3 Arguments: arg1 arg2 arg3
Replace arg1, arg2, and arg3 with your desired command line parameters.
You can now access and use these command line parameters in your R script. For example, you can assign them to variables or use them in a conditional statement.
Krunal Lathiya is a Software Engineer with over eight years of experience. He has developed a strong foundation in computer science principles and a passion for problem-solving. In addition, Krunal has excellent knowledge of Data Science and Machine Learning, and he is an expert in R Language.