[R] Grouped Histogram (colored)

[x0rr0x]

first of all: thank you for your replies!


hadley wrote:
> 
> On Thu, Oct 16, 2008 at 11:42 AM, x0rr0x <till.salzgeber at gmail.com> wrote:
>>
>> Hi all,
>>
>> I'm trying to create a histogram which shows the frequency of variables
>> within a certain timeframe.
>>
>> I've been using SPSS before, but I didn't quite like it...
>>
>> To describe my problem further here are some example variables:
>>
>> the "event" is actually a string which I recoded using:
>> [code]
>> data$event_class = as.numeric(as.factor(data$event))
>> [/code]
>> I've recoded them into numerics
>>
>>
>> csv:
>> [code]
>> time,event,event_class
>> 01,cookies,1
>> 05,cookies,1
>> 06,pie,2
>> 07,coffee,3
>> 08,cookies,1
>> 30,pie,2
>> 31,coffee,3
>> [/code]
>> and so on...
>>
>> Now I'd like to create a histogram where X is the time, the color of the
>> area is the event_class
>> and Y is defined by the frequency of event_class around some accumulated
>> time
> 
> install.packages("ggplot2")
> library(ggplot2)
> 
> qplot(time, fill = event, data = mydata, geom = "histogram")
> 
> You can find out more about ggplot2 at http://had.co.nz/ggplot2 - it's
> inspired by the Grammar of Graphics, which is also the theory that
> underlies SPSS's plotting systems.
> 
> Hadley
> 
> -- 
> http://had.co.nz/
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
> 

In install.packages("ggplot2") : package ‘ggplot2’ is not available
strange....


Greg Snow-2 wrote:
> 
> Does this do what you want?
> 
> colhist <- function(x,col){
>          tmp <- hist(x,plot=F)
>          br <- tmp$breaks
>          w <- as.numeric(cut(x,br,include.lowest=TRUE))
>          sy <- unlist(lapply(tmp$counts,function(x)seq(length=x)))
>          sy <- sy[order(order(x))]
>             plot( range(br), range( 0, sy ), xlab=deparse(substitute(x)),
>                         ylab='Frequency', type='n')
>          rect(br[w], sy-1, br[w+1], sy,
>             col=col,
>             border=NA)
>          rect(br[-length(br)], 0, br[-1], tmp$counts)
>      }
> 
> x <- rnorm(75, rep( c(90,100,110), each=25), 5 )
> g <- rep( c('red','green','blue'), each=25 )
> 
> colhist(x,g)
> 
> note: this colhist function is a modified version of the one from the help
> file for the tkBrush function in the TeachingDemos package.
> 
> --
> Gregory (Greg) L. Snow Ph.D.
> Statistical Data Center
> Intermountain Healthcare
> greg.snow at imail.org
> 801.408.8111
> 
> 
>> -----Original Message-----
>> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
>> project.org] On Behalf Of x0rr0x
>> Sent: Thursday, October 16, 2008 10:42 AM
>> To: r-help at r-project.org
>> Subject: [R] Grouped Histogram (colored)
>>
>>
>> Hi all,
>>
>> I'm trying to create a histogram which shows the frequency of variables
>> within a certain timeframe.
>>
>> I've been using SPSS before, but I didn't quite like it...
>>
>> To describe my problem further here are some example variables:
>>
>> the "event" is actually a string which I recoded using:
>> [code]
>> data$event_class = as.numeric(as.factor(data$event))
>> [/code]
>> I've recoded them into numerics
>>
>>
>> csv:
>> [code]
>> time,event,event_class
>> 01,cookies,1
>> 05,cookies,1
>> 06,pie,2
>> 07,coffee,3
>> 08,cookies,1
>> 30,pie,2
>> 31,coffee,3
>> [/code]
>> and so on...
>>
>> Now I'd like to create a histogram where X is the time, the color of
>> the
>> area is the event_class
>> and Y is defined by the frequency of event_class around some
>> accumulated
>> time
>>
>>
>>
>> In SPSS I used this:
>> Graphs -> Chart Builder
>> Gallery->Histogram
>> use some horizontal histogram
>> put "time" on the x-axis
>> select "grouping/stacking variables" in the "groups/point id" tab
>> and then set "Stack: set-color" to event_class
>> the y-axis will be automatically set to "histogram"
>>
>> thanks a lot in advance!
>>
>> Regards,
>> - x0rr0x
>> --
>> View this message in context: http://www.nabble.com/Grouped-Histogram-
>> %28colored%29-tp20015941p20015941.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
>> ______________________________________________
>> R-help at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-
>> guide.html
>> and provide commented, minimal, self-contained, reproducible code.
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
> 

not quiet. 

maybe I described it wrong. the occurences of event_class shouldn't add up
till the end. the graph should create blocks in certain time frames and then
display how often the event_class turn up during this timeframe.

also, is there a way to label the colors, preferably with their "data$event"
strings?


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