On 2014-09-10 10:45, PIKAL Petr wrote:
On 2014-09-08 15:47, William Dunlap wrote: > d <- data.frame(Choices=c("One","Two","One","Three"), X=1:4) > i <- 1 # possible output of menu(unique(d$Choices)) > d[ d$Choices[i] == d$Choices, ] > # Choices X > #1 One 1 > #3 One 3 > > testd <- data.frame(Choices=c("One","Two","One","Three"), X=1:4) > testi <- 1 # possible output of menu(unique(d$Choices)) > testd[ testd$Choices[testi] == testd$Choices, ] Choices X 1 One 1 3 One 3 This instruction did not give any opportunity to enter a choice? Then tried:Why do you think so? Did you try it? Follow Wiliam's advice d <- data.frame(Choices=c("One","Two","One","Three"), X=1:4) i <- menu(unique(d$Choices))
It looks that you understood that 'menu...' was to be assigned to the variable 'i'; I did not understand, it was interpreted as a part of a comment, not a command to apply! :)
Of course, the menu function as you wrote it was successfully replicated. Thanks.
BTW, did you read R-intro? If not, why not?
Yes, but for the benefit of other novices, information about 'menu' is accessible via '?menu' within R, or via R command 'help.start()' and web browser hyperlinks: 'packages','utils','menu'.
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