R help - Jun 2005 - Producing character "given" i.e. "| " with plotmath

Hello!

Does someone know how to produce

  L(y|mu)

with plotmath?

Some code with unsuccessfull results:

plot(dnorm(x = seq(from = -4, to = 4, by = 0.1)), type = "l")
## Not what I want
legend(legend = c(expression(L(y:mu))), x = "topright")

## Strange, is this a bug?
legend(legend = c(expression(L(y|mu))), x = "top")

## Group produces an error
legend(legend = c(expression(group(L(y, "|", mu)))), x =
"topleft")

## Paste keeps commas in expression
legend(legend = c(expression(paste(L(y, "|", mu)))), x =
"bottomleft")

## This one is OK, but braces are not as they should be 
legend(legend = c(expression(paste("L(y", "|",
"mu)"))), x = "bottom")

Thanks!

Lep pozdrav / With regards,
    Gregor Gorjanc

----------------------------------------------------------------------
University of Ljubljana
Biotechnical Faculty        URI: http://www.bfro.uni-lj.si/MR/ggorjan
Zootechnical Department     mail: gregor.gorjanc <at> bfro.uni-lj.si
Groblje 3                   tel: +386 (0)1 72 17 861
SI-1230 Domzale             fax: +386 (0)1 72 17 888
Slovenia, Europe
----------------------------------------------------------------------
"One must learn by doing the thing; for though you think you know it,
 you have no certainty until you try." Sophocles ~ 450 B.C.

Gorjanc Gregor wrote:
> Hello!
> 
> Does someone know how to produce
> 
>   L(y|mu)
> 
> with plotmath?
> 
> Some code with unsuccessfull results:
> 
> plot(dnorm(x = seq(from = -4, to = 4, by = 0.1)), type = "l")
> ## Not what I want
> legend(legend = c(expression(L(y:mu))), x = "topright")
> 
> ## Strange, is this a bug?
> legend(legend = c(expression(L(y|mu))), x = "top")

No, "|" is a logical Operator that can be rewritten in its original 
function form as follows:

"|"(FALSE, TRUE)

Hence the result is expected.
> ## Group produces an error
> legend(legend = c(expression(group(L(y, "|", mu)))), x =
"topleft")
You have not specified any delimiter.

> ## Paste keeps commas in expression
> legend(legend = c(expression(paste(L(y, "|", mu)))), x =
"bottomleft")
correct
> ## This one is OK, but braces are not as they should be 
> legend(legend = c(expression(paste("L(y", "|",
"mu)"))), x = "bottom")
What's wrong with the braces?`


What you really want is:
   legend(legend = c(expression(L(group("", y, "|") * mu))),
     x = "center")

Uwe Ligges

> Thanks!
> 
> Lep pozdrav / With regards,
>     Gregor Gorjanc
> 
> ----------------------------------------------------------------------
> University of Ljubljana
> Biotechnical Faculty        URI: http://www.bfro.uni-lj.si/MR/ggorjan
> Zootechnical Department     mail: gregor.gorjanc <at> bfro.uni-lj.si
> Groblje 3                   tel: +386 (0)1 72 17 861
> SI-1230 Domzale             fax: +386 (0)1 72 17 888
> Slovenia, Europe
> ----------------------------------------------------------------------
> "One must learn by doing the thing; for though you think you know it,
>  you have no certainty until you try." Sophocles ~ 450 B.C.
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html

>> Hello!
>> 
>> Does someone know how to produce
>> 
>>   L(y|mu)
>> 
>> with plotmath?
>> 
>> Some code with unsuccessfull results:
>> 
>> plot(dnorm(x = seq(from = -4, to = 4, by = 0.1)), type = "l")
>> ## Not what I want
>> legend(legend = c(expression(L(y:mu))), x = "topright")
>> 
>> ## Strange, is this a bug?
>> legend(legend = c(expression(L(y|mu))), x = "top")
> No, "|" is a logical Operator that can be rewritten in its
original
> function form as follows:
>
> "|"(FALSE, TRUE)
>
> Hence the result is expected.
Yes, that makes sense. Thanks!
>> ## Group produces an error
>> legend(legend = c(expression(group(L(y, "|", mu)))), x =
"topleft")
> You have not specified any delimiter.
Ok, I got this point wrong from ?plotmath .
>> ## Paste keeps commas in expression
>> legend(legend = c(expression(paste(L(y, "|", mu)))), x =
"bottomleft")
>correct
>> ## This one is OK, but braces are not as they should be 
>> legend(legend = c(expression(paste("L(y", "|",
"mu)"))), x = "bottom")
> What's wrong with the braces?`
They are not the same as in previous cases. They are not "bold".
> What you really want is:
>    legend(legend = c(expression(L(group("", y, "|") *
mu))),
>      x = "center")
Yes, that is what I want. Thanks!

I got additionally response from Roger D. Peng, which stated:
> How about
> legend(legend = expression("L(y | " * mu * ")"), x =
"topleft")
That's also OK, but note above comment about "bold" braces.

Regards, Gregor