R help - May 2012 - Help with getting values from string

Hi All,

I have a doubt. I used macros and i try to pass a value to a macro by
concatenating a bunch of strings. But it does not seem to work. Please help.
I have written down my code and the error message please tell me how to pass
the value that a string points to. Thanks in advance

#macro defined
machist_occ_kgfs<-defmacro(a,qnu_occ,b,qnl_occ,expr={with(subset(an_ind_data_fin,income_source==a
& region_id==b & normalised_income>qnl_occ &
normalised_income<qnu_occ),hist(normalised_income,main=paste(a,b,sep="
")))})
#macro called
machist_occ_kgfs(occ,paste("qnu",ri,occ,collapse="",sep=""),ri,paste("qnl",ri,occ,collapse="",sep=""))

Error in hist.default(normalised_income, main = paste(occ, ri, sep = "
"),
: 
  hist.default: pretty() error, breaksIn addition: Warning messages:
1: In min(x) : no non-missing arguments to min; returning Inf
2: In max(x) : no non-missing arguments to max; returning -Inf

The thing is
paste("qnu",ri,occ,collapse="",sep="") returns the
value
"qnu1Business__Others" but the variable - qnu1Business__Others
contains an
integer value which i need to be passed on to the macro. Hope i have made
myself clear. Thanks in advance for your help

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On 03.05.2012 12:39, renu.s7 wrote:
> Hi All,
>
> I have a doubt. I used macros and i try to pass a value to a macro by
> concatenating a bunch of strings. But it does not seem to work. Please
help.
> I have written down my code and the error message please tell me how to
pass
> the value that a string points to. Thanks in advance
>
> #macro defined
R> defmacro
Error: object 'defmacro' not found

...

So 1. provide full reproducible code and 2. format it in a more readable 
form and use R syntax.

Uwe Ligges


>
machist_occ_kgfs<-defmacro(a,qnu_occ,b,qnl_occ,expr={with(subset(an_ind_data_fin,income_source==a
> &  region_id==b&  normalised_income>qnl_occ&
>
normalised_income<qnu_occ),hist(normalised_income,main=paste(a,b,sep="
> ")))})
> #macro called
>
machist_occ_kgfs(occ,paste("qnu",ri,occ,collapse="",sep=""),ri,paste("qnl",ri,occ,collapse="",sep=""))
>
> Error in hist.default(normalised_income, main = paste(occ, ri, sep = "
"),
> :
>    hist.default: pretty() error, breaks> In addition: Warning messages:
> 1: In min(x) : no non-missing arguments to min; returning Inf
> 2: In max(x) : no non-missing arguments to max; returning -Inf
>
> The thing is
paste("qnu",ri,occ,collapse="",sep="") returns the
value
> "qnu1Business__Others" but the variable - qnu1Business__Others
contains an
> integer value which i need to be passed on to the macro. Hope i have made
> myself clear. Thanks in advance for your help
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/Help-with-getting-values-from-string-tp4605632.html
> Sent from the R help mailing list archive at Nabble.com.
>
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