[R] Help with getting values from string

[Uwe Ligges]

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
>
> --
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