R help - Nov 2012 - histogram help

Hi,

I want to generate an histogram and plot on the y axis the percentage of a
categorical variable and on the x axis a nominal variable. I want to move
the origin to have 2 categories below 0. Hope somebody could help me.
Thanks.

Best,
-- 
Rosario Ivano Scandurra

	[[alternative HTML version deleted]]

i think we need some sample data.  

I would not have thought that you could calculate the percentage of a
categorical data so perhaps a simple example of what you are doing would help.

John Kane
Kingston ON Canada

> -----Original Message-----
> From: rosario.scandurra at gmail.com
> Sent: Wed, 21 Nov 2012 19:15:53 +0100
> To: r-help at r-project.org
> Subject: [R] histogram help
> 
> Hi,
> 
> I want to generate an histogram and plot on the y axis the percentage of
> a
> categorical variable and on the x axis a nominal variable. I want to move
> the origin to have 2 categories below 0. Hope somebody could help me.
> Thanks.
> 
> Best,
> --
> Rosario Ivano Scandurra
> 
> 	[[alternative HTML version deleted]]
> 
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On 11/22/2012 05:15 AM, Rosario Scandurra wrote:
> Hi,
>
> I want to generate an histogram and plot on the y axis the percentage of a
> categorical variable and on the x axis a nominal variable. I want to move
> the origin to have 2 categories below 0. Hope somebody could help me.
> Thanks.
>
Hi Rosario,
If you already have your percentages, the barplot function will display 
them like most people expect an histogram to look by setting space=0. 
See the "names.arg" argument to have the names of your nominal
variables
on the x axis. I'm not sure exactly what you mean by wanting 2 
categories below 0. If these are negative percentages, the barplot 
function will automatically handle them.

Jim