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read variable global in R tcltk
2 messages · Handayani Situmorang, Philippe GROSJEAN
Read ?tclvalue.
For instance, you can do:
> tclvalue("tcl_library") # Read the content of a Tcl variable
[1] "/usr/local/lib/tcl8.4"
> .Tcl("set myvar 1") # Create a variable inside Tcl
<Tcl> 1
> tclvalue("myvar") # Read its value
[1] "1"
To make sure you create global variables in Tcl, start their names with
'::', like '::myglobalvar', if you like.
Best,
Philippe Grosjean
Handayani Situmorang wrote:
I have any problem with my code. I build a small GUI in R with tcltk package. the proolem is I don't understand how to make a variable value can be read by R from a function. the variable value can only read if it's called via tcltk widgets and pass it to another function. i think the point is the variable must be set as global variable. but i don't have any idea? is anyone can help me, please? Thank you very much.
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