Friday, May 14, 2021

Backup


 

In this article, the author examined the main types of backup operations, and the most common mistakes that many of us may make while backing up our data. Read more ...

Monday, February 15, 2021

Learning R & R Studio


 

Installing R & R Studio

https://www.lynda.com/RStudio-tutorials/RStudio-install/452087/490022-4.html?org=qc.cuny.edu

 Online Learning R Studio

https://www.rstudio.com/online-learning/#R 

Read a csv file and save it in a new data frame:
newdataframe <- read.csv("datafile.csv")

Add a new column to an existing data frame:
https://lembra.wordpress.com/2010/03/12/adding-new-column-to-a-data-frame-in-r/

https://discuss.analyticsvidhya.com/t/how-to-add-a-column-to-a-data-frame-in-r/3278

Add a new column to a data frame:

Add a sequential number to a colum:
data$ID <- seq.int(nrow(data))

 

Definition of Data frame: http://www.r-tutor.com/r-introduction/data-frame

 

Monday, January 25, 2021

Friday, January 1, 2021