[This article was first published on

Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.

**theBioBucket***, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.

I recently used R with GUI-elements for the first time and browsed through the available online resources, but I didn’t quite find what I was searching for: The user should be able to put in some variables and call a function with a button. In the end I did it with a little help from SO. Here is the working example that I eventually plugged together:

require(tcltk)

mydialog <- function(){

xvar <- tclVar("")

yvar <- tclVar("")

zvar <- tclVar("")

tt <- tktoplevel()

tkwm.title(tt,"MYTEST")

x.entry <- tkentry(tt, textvariable=xvar)

y.entry <- tkentry(tt, textvariable=yvar)

z.entry <- tkentry(tt, textvariable=zvar)

reset <- function() {

tclvalue(xvar)<-""

tclvalue(yvar)<-""

tclvalue(zvar)<-""

}

reset.but <- tkbutton(tt, text="Reset", command=reset)

submit <- function() {

x <- as.numeric(tclvalue(xvar))

y <- as.numeric(tclvalue(yvar))

z <- as.numeric(tclvalue(zvar))

tkmessageBox(message=paste("x + y + z = ", x+y+z, ""))

}

submit.but <- tkbutton(tt, text="submit", command=submit)

quit.but <- tkbutton(tt, text = "Close Session",

command = function() {

q(save = "no")

tkdestroy(tt)

}

)

tkgrid(tklabel(tt,text="Put your variables.."),columnspan=3, pady = 10)

tkgrid(tklabel(tt,text="x variable"), x.entry, pady= 10, padx= 10)

tkgrid(tklabel(tt,text="y variable"), y.entry, pady= 10, padx= 10)

tkgrid(tklabel(tt,text="z variable"), z.entry, pady= 10, padx= 10)

tkgrid(submit.but, reset.but, quit.but, pady= 10, padx= 10)

}

mydialog()

To

**leave a comment**for the author, please follow the link and comment on their blog:**theBioBucket***.R-bloggers.com offers

**daily e-mail updates**about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job.

Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.