[R] sequential input script dataframe process functionality

[PIKAL Petr]

Hi

> Now confused by "Choices"! :) What is my error please?

Your main error is that you do not read help which was offered by Wiliam. Choices is not a function it is name of a variable. You can call it e.g. ctsanddogs if you wish.

see in line

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of rl at openmailbox.org
> Sent: Tuesday, September 09, 2014 12:53 PM
> To: William Dunlap
> Cc: r-help at r-project.org
> Subject: Re: [R] sequential input script dataframe process
> functionality
>
> 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))

now i is set to some value according your choice

d[ d$Choices[i] == d$Choices, ]

selects items which correspond to chosen value.

BTW, did you read R-intro? If not, why not?

Regards
Petr

>
> ?Choices
> No documentation for 'Choices' in specified packages and libraries:
> you could try '??Choices'
>
> ??Choices
> Help files with alias or concept or title matching ‘Choices’ using
> fuzzy matching:
>
>
> mgcv::choose.k          Basis dimension choice for smooths
> mvtnorm::GenzBretz      Choice of Algorithm and Hyper Parameters
>
>
> Type '?PKG::FOO' to inspect entry 'PKG::FOO TITLE'.
>
> Then I tried to use with my test data:
>
> testdataextract1<-
> data.frame(menu(c(unique(levels(testdata[,1]))),graphics=FALSE,title='S
> elect
> something'))
> selectionresult<-2
> testdata[testdata$menu[selectionresult]==testdata$menu,]
> > testdataextract1<-
> data.frame(menu(c(unique(levels(testdata[,1]))),graphics=FALSE,title='S
> elect
> > something'))
> Select something
>
> 1: text test1
> 2: text test2
> 3: text test3
>
> Selection: selectionresult<-2
> Enter an item from the menu, or 0 to exit
> Selection: testdata[testdata$menu[selectionresult]==testdata$menu,]
> Enter an item from the menu, or 0 to exit
> Selection: 0
>
> Now confused by "Choices"! :) What is my error please?
>
> ______________________________________________
> 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.

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