[R] Run function several times changing only one argument - without a loop

[Eik Vettorazzi]

Hi Marion,
you can either use any of the *apply-functions or vectorize your
function (which internally uses mapply):

par(las=1)
par(mar=c(5,13,4,2))
barplot(Ee1,horiz=T,col="grey85",border="NA",xlim=c(0,100),axes=F)

#using sapply
invisible(sapply((1:9)*10,function(x)axis(2,pos=x,tick=T, tcl=F,
labels=F,col="white")))

#using Vectorize
barplot(Ee1,horiz=T,col="grey85",border="NA",xlim=c(0,100),axes=F)
vaxis<-Vectorize(axis,"pos")
invisible(vaxis(2,pos=(1:9)*10, tick=T, tcl=F, labels=F,col="white"))

Cheers!

Am 20.02.2012 11:04, schrieb Marion Wenty:
> Dear people,
> 
> I created a plot which looks like this:
> 
> Ee1<-matrix(c(88,86,74,62,41),ncol=5)
> colnames(Ee1)<-c("Lehrer","Lehrerinnen","Klassenkollegen","Klassenkolleginnen","Geschwister")
> par(las=1)
> par(mar=c(5,13,4,2))
> barplot(Ee1,horiz=T,col="grey85",border="NA",xlim=c(0,100),axes=F)
> axis(2,pos=10, tick=T, tcl=F, labels=F,col="white")
> axis(2,pos=20, tick=T, tcl=F, labels=F,col="white")
> axis(2,pos=30, tick=T, tcl=F, labels=F,col="white")
> axis(2,pos=40, tick=T, tcl=F, labels=F,col="white")
> axis(2,pos=50, tick=T, tcl=F, labels=F,col="white")
> axis(2,pos=60, tick=T, tcl=F, labels=F,col="white")
> axis(2,pos=70, tick=T, tcl=F, labels=F,col="white")
> axis(2,pos=80, tick=T, tcl=F, labels=F,col="white")
> axis(2,pos=90, tick=T, tcl=F, labels=F,col="white")
> 
> Now I would like to shorten the whole thing - namely use only one step to
> create the 9 axes without having to use a loop.
> 
> In general, I would be interested if there is a way to use a function
> several times changing only one argument, without having to use a loop.
> 
> Does anyone know how to do that.
> 
> Marion
> 
> 	[[alternative HTML version deleted]]
> 
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Eik Vettorazzi
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Universitätsklinikum Hamburg-Eppendorf

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