plot histogram of a distribution

["Krishnamachari, Raghuraman" <Raghu.Krishnamachari@leggmasonasia.com.sg>]

Dear all,

 

I am new to this list and splus. I am trying to plot a histogram of a distribution using "histogram".

The issue is i am unable to call this in a loop with different Factors variables.

 

> factor.names
[1] "Tobin.Q" "EBITDA"  "FCF"

 

> factor.cols
[1] "Tobin.Q" "EBITDA"  "FCF" 

 

=================================

for(i in 1:length(factor.cols)) {
 
 f.name<-factor.names[i]

histogram(~ f.name | Country, data="" = 10,type="count")
}
====================================

 

when i replace f.name with the numeric column names like FCF,EBITDA individually, the above function works. But how to pass these values in a loop.

 

histogram(~ FCF | Country, data="" = 10,type="count") -- works

 

whereas

 

histogram(~ "FCF" | Country, data="" = 10,type="count")

-- gives different results.

 

 

Hope someone throw light on this.

 

thanks,

 

Raghu.

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