Re: plot histogram of a distribution

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

Thanks a lot Dave.. It works.

 

But how to print the graphs in different pages of the same sheet.

i find that its overwriting in the same page.

 

---

From: David L Lorenz [mailto:lorenz@usgs.gov]
Sent: Thursday, August 24, 2006 8:33 PM
To: Krishnamachari, Raghuraman
Cc: s-news@lists.biostat.wustl.edu; s-news-owner@lists.biostat.wustl.edu
Subject: Re: [S] plot histogram of a distribution

Raghu, 
  If you look at the formula in your for loop, you 
will see that it has exactly the same appearance as the one that works. That 
means the routines that evaluate the formula see the same thing and are looking 
at a column named f.name in the data set and not a column named FCF. You know 
that f.name is a variable that represents that column, but the routine that evaluates the formula does not. 
  
For cases like this, you can use the as.formula() function. Try this: 

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

  I do not see 
where Country comes from if you select only the column f.name from data! 
Dave

"Krishnamachari, Raghuraman" <Raghu.Krishnamachari@leggmasonasia.com.sg>
Sent by: s-news-owner@lists.biostat.wustl.edu

08/23/2006 09:52 PM

To	<s-news@lists.biostat.wustl.edu>
cc
Subject	[S] plot histogram of a distribution

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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