R help - Oct 2013 - ggplot2 question: keeping the order as in the input data

Hello!

I am using ggplot2 (see the code below) to plot the data in
'myplotdata'.
The first column of 'myplotdata' is called "att.levels" and
contains
strings; the second column is called "WTP" and contains numeric
values.
Notice - I use 'coord.flip()'

The command aes(x=att_levels, y=WTP), if I understand correctly, sorts
things alphabetically based on the column 'att_levels'.
Question 1: How can I reverse the order for x in the plot (also
alphabetically but in the opposite direction)?
Question 2: How can I just have exactly the same order as in the object
'myplotdata'?

Thanks a lot!

ggplot(myplotdata, aes(x=att_levels, y=WTP)) +
                geom_bar(stat="identity",fill="dark
orange",colour="black",
alpha = 1,position = "identity") +

geom_text(aes(label=WTP),colour="black",size=4,hjust=1.1,position='dodge')
+
                coord_flip() +
                xlab("") +
                ylab("")




-- 
Dimitri Liakhovitski

	[[alternative HTML version deleted]]

Try making att_levels (or att.levels, whatever you really call it)
into a factor with the levels in the order you like.  E.g.,
    aes(x = factor(att_levels, levels=unique(att_levels)), y = WTP)
instead of
    aes(x = att_levels, y = WTP) 

Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at
r-project.org] On Behalf
> Of Dimitri Liakhovitski
> Sent: Wednesday, October 30, 2013 7:35 AM
> To: r-help
> Subject: [R] ggplot2 question: keeping the order as in the input data
> 
> Hello!
> 
> I am using ggplot2 (see the code below) to plot the data in
'myplotdata'.
> The first column of 'myplotdata' is called "att.levels"
and contains
> strings; the second column is called "WTP" and contains numeric
values.
> Notice - I use 'coord.flip()'
> 
> The command aes(x=att_levels, y=WTP), if I understand correctly, sorts
> things alphabetically based on the column 'att_levels'.
> Question 1: How can I reverse the order for x in the plot (also
> alphabetically but in the opposite direction)?
> Question 2: How can I just have exactly the same order as in the object
> 'myplotdata'?
> 
> Thanks a lot!
> 
> ggplot(myplotdata, aes(x=att_levels, y=WTP)) +
>                 geom_bar(stat="identity",fill="dark
orange",colour="black",
> alpha = 1,position = "identity") +
> 
>
geom_text(aes(label=WTP),colour="black",size=4,hjust=1.1,position='dodge')
+
>                 coord_flip() +
>                 xlab("") +
>                 ylab("")
> 
> 
> 
> 
> --
> Dimitri Liakhovitski
> 
> 	[[alternative HTML version deleted]]
> 
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