Bradley Monk at 04:37, 12 April 2021

2021-04-12T04:37:28Z

← Older revision		Revision as of 21:37, 11 April 2021
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	rx(c("j","k"))		rx(c("j","k"))

	~~this~~ will clear		Calling <code>rx()</code> will clear all variables from the workspace except for variables <code>j</code> and <code>k</code>.

Bradley Monk: Created page with "Custom R Programming Language Functions ==Clear All Variables From Workspace Except== MATLAB has a built-in method to clear all variables from the current workspace environ..."

2021-04-12T04:34:57Z

Created page with "Custom R Programming Language Functions ==Clear All Variables From Workspace Except== MATLAB has a built-in method to clear all variables from the current workspace environ..."

New page

Custom R Programming Language Functions

==Clear All Variables From Workspace Except==

MATLAB has a built-in method to clear all variables from the current workspace environment, except for one or more specified variables. This can be done simply by typing...

>> -clearvars except VAR1 VAR2 ETC

I've created the following function to perform the same operation in R...

> rx<-function(S){rm(list=setdiff(ls(.GlobalEnv),c("rx",S)),envir=.GlobalEnv)}

This function can be inserted near the top of a script, and evaluated for (re)use later on in the script. This will allow the user to clear all environmental variables from the workspace except for the subset of variables that are required later on in the script. For example...

a <- c(1, 2, 3)
b <- c(2, 3, 4)
c <- c(3, 4, 5)
d <- c(4, 5, 6)
e <- c(5, 6, 7)
f <- c(6, 7, 8)
g <- cbind(a,b)
h <- cbind(c,d)
i <- cbind(e,f)
j <- cbind(g,h,i)
k <- rbind(g,h,i)

rx(c("j","k"))

this will clear

[[category:r]]
[[category:rstudio]]
[[category:rlang]]

Custom R Functions - Revision history

Bradley Monk at 04:37, 12 April 2021

Bradley Monk: Created page with "Custom R Programming Language Functions ==Clear All Variables From Workspace Except== MATLAB has a built-in method to clear all variables from the current workspace environ..."