Re: st: Suppress labeling of categorical axis values in graph bar/hbar

[Eric Booth <ebooth@ppri.tamu.edu>]

<>

I think that working with the relabel option is your best bet.  You can automate
 the creation of the  relabel() expression with a loop, but normally I'd suggest
 building it in a local macro , but I couldn't get the local to store the double 
quotes for use in the relabel option.  

Here's some examples of things I tried:

***!
sysuse auto, clear
forval n = 1/`=_N' {
	loc la1 `la1' `"`n' " " "'
	loc la2 `la2' "`n' " " "
	loc la3 `la3' `n' `" "' 
	loc la4 `"`la4' `n' " "'"'
	}
forval n = 1/4 {
	di in y as smcl "`n' {hline}"
	di in g "`la`n''"
	}
***!
Anyone have an idea of how to store the double quotes  in a local to pass to the 
relabel option?


Since using the local didn't work for me, here's a less straightforward solution 
using a couple of string variables (which are limited to 244 chars) to do essentially 
the same thing:

***********!
sysuse auto, clear

foreach v in "1/15" "16/30" "31/45" "46/60" "61/74" {
**get variable name**
loc varname `v'
loc varname: subinstr local varname `"/"' "", all

**create "o" vars with relabel option**
g o`varname' = ""
forval n = `v' {
if !inlist(`n', 1, 20, 40, 60 , 74)  ///
replace o`varname' = o`varname' + `" `n' " " "'
if inlist(`n', 1, 20, 40, 60 , 74)  ///
replace o`varname' = o`varname' + `" `n' "`=make[`n']' ""'
 }
}

ds o* //<-- Here's the new vars for relabel()

graph hbar (asis) price, bargap(10)  ///
 over(make, relabel(`=o115' ///
 `=o1630'  `=o3145'  `=o4660'  `=o6174')  ///
 label(angle(horizontal) labsize(vsmall) labgap(5)))
 
***********!

After kludging all this together, it might be more work than typing out
 the relabel()  for 74 obs in the auto.dta;  however, it would be useful 
for much  larger datasets.  (However,  you can't get too much larger 
before  the bars become indistinguishable.)


- Eric
__
Eric A. Booth
Public Policy Research Institute
Texas A&M University
ebooth@ppri.tamu.edu
Office: +979.845.6754
Fax: +979.845.0249
http://ppri.tamu.edu


On Dec 18, 2010, at 3:13 PM, Davide Cantoni wrote:

> Hello,
> 
> I would like to draw a bar chart displaying the values of a given
> variable for all the observations in the dataset. However, since there
> are many observations, I would like to label only some of them (some
> representative cases). Conceptually, this is similar to this working
> example:
> 
> *** begin example
> sysuse auto, clear
> graph hbar (asis) price, over(make, sort(price))
> *** end example
> 
> As you can see, putting all the labels on the categorical axis leads
> to overcrowding. What I would like to do is to label only some
> representative examples, e.g. only "Renault Le Car", "VW Diesel" and,
> say, "Lincoln Versailles".  I guess I can achieve the suppression of
> labels with some relabel() command inside the over() parenthesis, but
> given the large number of observations, this would be incredibly
> cumbersome. Any other suggestions?
> 
> Thanks in advance,
> 
> Davide
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