[R] How to add widgets of gWidgets to widgets of rgtk2 ???

[KRISHNA2222]

I have a layout in  gwidgets. To this, I wanted to add a Textbox(gtkEntry)
created from rgtk2... 

The code is as follows: 

MainLayOut <- glayout(homogeneous = FALSE, spacing = 10, container =
SubGroup)
MainLayOut[1, 1, anchor=left] <- "Number of Total Patients: "
font(MainLayOut[1, 1, anchor=left]) <- c(weight="bold")
patients <- gtkEntry()
patients['text'] <- "200"
patients['xalign'] <- 1
MainLayOut[1, 2, anchor=Right ]$add(patients) # <- gedit("200",
container=MainLayOut)

Error: Error in MainLayOut[1, 2, anchor = Right]$add : 
  $ operator is invalid for atomic vectors

please provide me a solution

Thanking you
Krishna



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