Hi all, I have some time trying to find a way to stop a loop for( ) until the
user presses the enter key or any other one and the loop can continue.
This could
be an example:
library(MASS)
data <- data.frame(mvrnorm(1000,rep(0,5),Sigma=diag(1,5)))
for(i in 1:dim(data)[2]){
plot(density(data[,i]), main=paste('histogram',i))
#here something like waituntil command
}
Thank's in advance
Juan A. Hernandez
Spain.
[[alternative HTML version deleted]]
A somewhat common idiom is to use readline() with "Please press <Return> to continue:" as the prompt and not to store the value anywhere. Michael On Wed, Feb 8, 2012 at 2:45 PM, Juan Andres Hernandez <jhernandezcabrera at gmail.com> wrote:> Hi all, I have some time trying to find a way to stop a loop for( ) until the > user presses the enter key or any other one and the loop can continue. > This could > be an example: > > ?library(MASS) > ?data <- data.frame(mvrnorm(1000,rep(0,5),Sigma=diag(1,5))) > ?for(i in 1:dim(data)[2]){ > ?plot(density(data[,i]), main=paste('histogram',i)) > ?#here something like waituntil command > ?} > > Thank's in advance > Juan A. Hernandez > Spain. > > ? ? ? ?[[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.
If you want to pause for the person to look at a plot before going on to the next plot then just do:> par(ask=TRUE)This will actually allow your loop to continue with calculations while the user looks at the plot but will pause before drawing the next plot (hitting enter in the command window or clicking on the plot window will allow the code to continue). If you want to pause for something other than a plot then use readline like Michael suggests. On Wed, Feb 8, 2012 at 12:45 PM, Juan Andres Hernandez <jhernandezcabrera at gmail.com> wrote:> Hi all, I have some time trying to find a way to stop a loop for( ) until the > user presses the enter key or any other one and the loop can continue. > This could > be an example: > > ?library(MASS) > ?data <- data.frame(mvrnorm(1000,rep(0,5),Sigma=diag(1,5))) > ?for(i in 1:dim(data)[2]){ > ?plot(density(data[,i]), main=paste('histogram',i)) > ?#here something like waituntil command > ?} > > Thank's in advance > Juan A. Hernandez > Spain. > > ? ? ? ?[[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.-- Gregory (Greg) L. Snow Ph.D. 538280 at gmail.com