R help - Apr 2005 - plotting mathematical notation and values substitution

Gidday,

See ?plotmath and demo(plotmath) for lots of information on plotting
with mathematical symbols.

This produces what you seem to be after (paste() being the missing
ingredient):
plot(1:10, main=substitute(paste("Monotonic Multigamma run ( *",
             list(n==len, theta==t1), " * )"),
             list(len=len, t1=t1)))

This does seem to be a lot of work just to get a theta symbol, and
this seems just as informative:
plot(1:10, main=paste("Monotonic Multigamma run ( * n =", len,
             "theta =", t1, " * )"))

Your second example gives a syntax error for me.

Cheers!
Rich

On Apr 5, 2005 6:50 AM, Luca Scrucca <luca at stat.unipg.it>
wrote:
> # I add this to let you run the example by copy and paste
> > t1 <- 0.5; len <- 1
> # then
> > plot(1:10,
>        main = substitute("Monotonic Multigamma run (" * n == len
* ", " *
> theta == t1 * ").", list(len = len, t1 = t1)))
> 
> but I got the following:
> 
> Error: syntax error
> 
> I also tried with just one value substitution:
> 
> > plot(1:10,
>        main = substitute("Monotonic Multigamma run (" theta == t1
* ").",
> list(len = len, t1 = t1)))
> 
> which works fine. How can I have more than one value substitution,
> together with mathematical notation and text?
--
Rich FitzJohn
rich.fitzjohn <at> gmail.com   |   
http://homepages.paradise.net.nz/richa183
                      You are in a maze of twisty little functions, all alike

Luca Scrucca <luca at stat.unipg.it> writes:
> Dear R-users,
> 
> I'm trying to add a title on a plot with both mathematical notation and
> values substitution. I read the documentation and search the mailing list
> but I was not able to solve my problem. Actually, there is a message by
> Uwe Ligges on June 2003 which addresses a question very close to mine, but
> the code provided doesn't work. The code is the following:
> 
> # I add this to let you run the example by copy and paste
> > t1 <- 0.5; len <- 1
> # then
> > plot(1:10,
>        main = substitute("Monotonic Multigamma run (" * n == len
* ", " *
> theta == t1 * ").", list(len = len, t1 = t1)))
> 
> but I got the following:
> 
> Error: syntax error
There's a ")" too many, but more importantly, you have the
structure

A*B==C*D*E==F*G

Since * has higher precedence than ==, this involves associative use
of relational operators (as in 3 < 2 < 1), which is syntactically
forbidden. So you need braces as in

A*{B==C}*D*{E==F}*G

or, maybe easier to read, use:

paste(A, B==C, D, E==F, G}


-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907

Luca Scrucca wrote on 4/4/2005 1:50 PM:
> Dear R-users,
> 
> I'm trying to add a title on a plot with both mathematical notation and
> values substitution. I read the documentation and search the mailing list
> but I was not able to solve my problem. Actually, there is a message by
> Uwe Ligges on June 2003 which addresses a question very close to mine, but
> the code provided doesn't work. The code is the following:
> 
> # I add this to let you run the example by copy and paste
> 
>>t1 <- 0.5; len <- 1
> 
> # then
> 
>>plot(1:10,
> 
>        main = substitute("Monotonic Multigamma run (" * n == len
* ", " *
> theta == t1 * ").", list(len = len, t1 = t1)))
> 
> but I got the following:
> 
> Error: syntax error
> 
> I also tried with just one value substitution:
> 
> 
>>plot(1:10,
> 
>        main = substitute("Monotonic Multigamma run (" theta == t1
* ").",
> list(len = len, t1 = t1)))
> 
> which works fine. How can I have more than one value substitution,
> together with mathematical notation and text?
> 
> Thanks in advance for any reply.
> 
> Luca Scrucca
> 
> 
Luca,

I believe you need paste in this instance:

t1 <- 0.5; len <- 1
plot(1:10, main = substitute(paste("Monotonic Multigamma run (", n == 
len, ", ", theta == t1, ").", sep = ""), list(len
= len, t1 = t1)))


--sundar

Dear R-users,

I'm trying to add a title on a plot with both mathematical notation and
values substitution. I read the documentation and search the mailing list
but I was not able to solve my problem. Actually, there is a message by
Uwe Ligges on June 2003 which addresses a question very close to mine, but
the code provided doesn't work. The code is the following:

# I add this to let you run the example by copy and
paste
> t1 <- 0.5; len <- 1
# then
> plot(1:10,
       main = substitute("Monotonic Multigamma run (" * n == len *
", " *
theta == t1 * ").", list(len = len, t1 = t1)))

but I got the following:

Error: syntax error

I also tried with just one value substitution:
> plot(1:10,
       main = substitute("Monotonic Multigamma run (" theta == t1 *
").",
list(len = len, t1 = t1)))

which works fine. How can I have more than one value substitution,
together with mathematical notation and text?

Thanks in advance for any reply.

Luca Scrucca


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| Dr. Luca Scrucca                                                      |
| Dipartimento di Economia, Finanza e Statistica                        |
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