[R] Several quick questions
Sébastien
pomchip at free.fr
Sat Jul 7 14:45:39 CEST 2007
Dear R users,
Here is a couple a quick questions, for which I was unable to not find
any answer in the list archives and in the help:
1- Is there any R equivalents of the VB functions Cint, CStr, etc...
(for non VB users, these functions transform the category of a specified
variable and smartly adapt the value of this variable) ?
I have tried to use the as.numeric, as.factor and as.vector commands but
the result is not exactly what I want ([1] 1, 3, 5, 6)
>a<-as.factor(cbind(1,3,5,6)) # creates a dummy factor
>a
[1] 1 3 5 6
Levels: 1 3 5 6
>> a<-as.vector(as.numeric(a))
> a
[1] 1 2 3 4
2- When a log scale is called in a graph, the label takes a format like
10^n. Is there a way to come back to a regular number format like 1, 10,
100... without having to create a custom axis ?
3- In lattice graphics, how does the default value of the "axs" argument
influence the values of "limits" ?
This question should be considered in the following context. The help
states that a 4% extension is applied by default to the axis range in
base graphics. So, I have tried to apply this 4 % extension to create
some custom lattice graphics. I worked on a dataset in which the
independent variable ranged from 0 to 120, so I basically customized my
axis using limits=c(-4.8,124.8). The results of the graphics with and
without the limits command were not identical...
Thanks in advance for your help.
Sebastien
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