[R] inconsistency in switch statements.....

[Bill Dunlap]

It doesn't really work.  If the first argument to switch() is a character
string then it chooses the argument by name; for a number it chooses by
position.  In your case the name and position matched so you did not notice
the difference.

> switch(2, `2` = "first", `1` = "second")
[1] "second"
> switch("2", `2` = "first", `1` = "second")
[1] "first"

-Bill



On Wed, Sep 7, 2022 at 11:46 AM akshay kulkarni <akshay_e4 using hotmail.com>
wrote:

> Dear Andrew,
>                          Its working. Thanks a lot....
>
> Yours sincerely,
> AKSHAY M KULKARNI
>
> ________________________________
> From: Andrew Simmons <akwsimmo using gmail.com>
> Sent: Thursday, September 8, 2022 12:08 AM
> To: akshay kulkarni <akshay_e4 using hotmail.com>
> Cc: R help Mailing list <r-help using r-project.org>
> Subject: Re: [R] inconsistency in switch statements.....
>
> 1 and 2 are not valid identifiers in R, so you need to surround them with
> backticks to make them valid, the same as quoting a string:
>
> switch(Stst, `1` = print("NO"), `2` = print("YES"))
>
>
> On Wed., Sep. 7, 2022, 14:35 akshay kulkarni, <akshay_e4 using hotmail.com
> <mailto:akshay_e4 using hotmail.com>> wrote:
> Dear members,
>                              The following is my code:
>
> > Stst <- 2
> > switch(Stst, 1 = print("NO"), 2 = print("YES"))
> Error: unexpected '=' in "switch(Stst, 1 ="
>
> Why isn't it printing "YES" on to the console?
>
> many thanks in advance.
>
> Thanking you,
> Yours sincerely,
> AKSHAY M KULKARNI
>
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>
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>

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