[R] Expression evaluation of Plotting labels containing spaces

[Pascal Oettli]

Hello,

?plotmath -> See Also
demo(plotmath)

Regards,
Pascal


On 05/06/13 15:00, Santosh wrote:
> Thanks so much!!
> Would be it be better if in vignette of plotmath, x %~% y and x~~y;
> likewise, other operations (.e.g.,
>   x %*% y, x * y) may be grouped, so that are not missed by a layman like
> me! - just a thought...
>
> Thanks,
> Santosh
>
>
>
>
> On Tue, Jun 4, 2013 at 9:13 PM, David Winsemius <dwinsemius at comcast.net>wrote:
>
>>
>> On Jun 4, 2013, at 8:39 PM, Santosh wrote:
>>
>>   Dear Rxperts,
>>> How do I overcome the anomaly as in the second case of examples below?
>>>
>>> exc <- list(units=list( c(m^2)) ,vars= list(c('asb')), ,label= list(c('abs
>>> surf body')))
>>>
>>> plot(1:10,1:10, ylab=parse(text= paste(exc$vars[1],'
>>> (',exc$units[1],')',sep='')))
>>>
>>> plot(1:10,1:10, ylab=parse(text= paste(exc$label[1],'
>>> (',exc$units[1],')',sep='')))
>>>
>>
>> Mail client mangled this due entirely to your improper use HTML. You have
>> been posting to Rhelp long enough to have had plenty of opportunity to read
>> the Posting Guide. And I know for a fact that it is quite easy to send
>> plain text using gmail. You have no legitimate excuse for continuing this
>> deprecated practice.
>>
>> Anyway,  running this code:
>>
>> exc <- list(units=list( c("m^2")) ,vars= list(c('asb')), label=
>> list(c('abs surf body')))
>> # Notice that I quoted the 'units' value
>>
>> plot(1:10,1:10, ylab=parse(text= paste(exc$vars[1],'(',exc$**
>> units[1],')',sep='')))
>> # Also note that plotmath cannot handle embedded carriage returns
>>
>> plot(1:10,1:10, ylab=parse(text= paste(exc$label[1],'(',exc$**
>> units[1],')',sep='')))
>>
>> Produces this error:
>>
>> Error in parse(text = paste(exc$label[1], "(", exc$units[1], ")", sep =
>> "")) :
>>    <text>:1:5: unexpected symbol
>> 1: abs surf
>>         ^
>> (You are asked in the Posting Guide exactly your code and also to post
>> your error messages.)
>>
>> So you are trying to parse an expression and the parser is expecting a
>> comma or a tilde or  .... something other than the beginning of another
>> token. You never said what you actually wanted (also a request in the
>> Posting Guide),  but try adding tilde's:
>>
>> exc <- list(units=list( c("m^2")) ,vars= list(c('asb')), label=
>> list(c('abs~surf~body')))
>>
>>
>> plot(1:10,1:10, ylab=parse(text= paste(exc$vars[1],'(',exc$**
>> units[1],')',sep='')))
>>
>> plot(1:10,1:10, ylab=parse(text= paste(exc$label[1],'(',exc$**
>> units[1],')',sep='')))
>>
>> I know that the plotmath help page is not exactly the most expansive
>> regarding how to form proper expressions for R but at least review it and
>> run the examples:
>>
>> ?plotmath
>>
>> --
>> David.
>>
>>
>>
>>> Thanks so much!
>>>
>>> Santosh
>>>
>>>          [[alternative HTML version deleted]]
>>>
>>
>> Sigh.
>>
>>
>>>
>>> R-help at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/**listinfo/r-help<https://stat.ethz.ch/mailman/listinfo/r-help>
>>> PLEASE do read the posting guide http://www.R-project.org/**
>>> posting-guide.html <http://www.R-project.org/posting-guide.html>
>>>
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^**^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^**
>> ^^^^^^^^^^^^^
>>
>>   and provide commented, minimal, self-contained, reproducible code.
>>>
>>
>>
>> ---
>> David Winsemius, MD
>> Alameda, CA, USA
>>
>>
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>