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 <paulberna...@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 sáb, 12 mar 2022 a las 12:04, Jeff Newmiller (<jdnew...@dcn.davis.ca.us>)
>escribió:
>
>> 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 <paulberna...@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@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.
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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and provide commented, minimal, self-contained, reproducible code.
