[R] Plot()

[Uwe Ligges]

Ute Visser wrote:

> Hello!
> 
> I wonder why the x and the y expression are treated differently in the
> plot-function?
> In the example below I should get three times the same graph, shouldn't
> I?
> 
> column<-c(0,1)
> par(mfrow = c(3,1))
> plot((1-column)~column)
> plot(column~(1-column))

In right hand sides of formulas you have to use I() in order to do these 
calculations:

  plot(column ~ I(1-column))

or plot() will simply plot against the index (column ~ 1) and ignores 
the unsensible last part "-column".

Uwe Ligges


> plot(column~as.vector(1-column))
> 
> Thanks for checking!
> 
> U
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html