Message-ID: <CAMOcQfNvd8us6Lq7ikpDhNrnXhtvj0LN0LLxPMjAy7aWuLnSfA@mail.gmail.com>
Date: 2022-03-12T17:49:30Z
From: Paul Bernal
Subject: Is there a Truth Table Generator in R?
In-Reply-To: <D2BFAF8D-0E12-4546-9405-DEC9F1473AA3@dcn.davis.ca.us>
Dear Jeff,
Thank you so much for your extremely valuable feedback. I apologize for not
doing the reply all, forgot it.
Best regards,
Paul
El s?b, 12 mar 2022 a las 12:47, Jeff Newmiller (<jdnewmil at dcn.davis.ca.us>)
escribi?:
> Please keep the list included in the thread using reply-all...
>
> tt[,3:1] reverses the columns in tt. The expand.grid function cycles
> through possible values most quickly in the first column, which is useful
> if you intend to convert the result to a matrix, but is not conventional
> for truth tables.
>
> Here is a generalized version for any sequence of legal R symbol labels nm:
>
> both <- c( FALSE, TRUE )
> nm <- letters[ 1:4 ]
> tt <- rev( do.call( expand.grid, setNames( rep( list( both ), length( nm )
> ), rev( nm ) ) ) )
> tt
>
> or in R 4.1+...
>
> tt <- ( list( both )
> |> rep( length( nm ) )
> |> setNames( rev( nm ) )
> |> ( \(.) do.call( expand.grid, . ) )()
> |> rev()
> )
>
> On March 12, 2022 9:08:23 AM PST, Paul Bernal <paulbernal07 at gmail.com>
> wrote:
> >Dear Jeff,
> >
> >Thank you so much for your valuable feedback. at the end, in the command
> tt
> ><- [,3:1] what exactly does this do? If I wanted to create code to
> >accomodate for any number of variables, how would I change that code?
> >
> >Best regards,
> >Paul
> >
> >El s?b, 12 mar 2022 a las 12:04, Jeff Newmiller (<
> jdnewmil at dcn.davis.ca.us>)
> >escribi?:
> >
> >> both <- c( FALSE, TRUE )
> >> tt <- expand.grid( C = both
> >> , B = both
> >> , A = both
> >> )
> >> tt <- tt[, 3:1 ]
> >>
> >> On March 12, 2022 8:42:28 AM PST, Paul Bernal <paulbernal07 at gmail.com>
> >> wrote:
> >> >Dear friends,
> >> >
> >> >Hope you are doing great. I have been searching for a truth table
> >> generator
> >> >in R, but everything I find has a Python implementation instead.
> >> >
> >> >Maybe there is in fact a truth table generator in R, but I am not
> >> searching
> >> >in the right places?
> >> >
> >> >Any help and/or guidance will be greatly appreciated.
> >> >
> >> >Best regards,
> >> >Paul
> >> >
> >> > [[alternative HTML version deleted]]
> >> >
> >> >______________________________________________
> >> >R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> >> >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.
> >>
> >> --
> >> Sent from my phone. Please excuse my brevity.
> >>
>
> --
> Sent from my phone. Please excuse my brevity.
>
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