[R] ggplot2::qplot() -- arbitary transformations of coordinate system?

[hadley wickham]

Hi Michael,

You could use aes(y = 1000 * myyvar) and coord_trans(trans_y = "inverse")

Hadley

On Sun, Sep 6, 2009 at 6:30 AM, Michael Kubovy<kubovy at virginia.edu> wrote:
> Hi Stephen,
>
> Because coord_trans() does all the work of plotting the original values on
> the tranformed scale. See ?coord_trans. To quote: "The difference between
> transforming the scales and transforming the coordinate system is that scale
> transformation occurs BEFORE statistics, and coordinate transformation
> afterwards."
>
> # After
> require(ggplot2)
> data(diamonds)
> # Three ways of doing transformating in ggplot:
> # * by transforming the data
> qplot(log10(carat), log10(price), data=diamonds)
> # * by transforming the scales
> qplot(carat, price, data=diamonds, log="xy")
> qplot(carat, price, data=diamonds) + scale_x_log10() + scale_y_log10()
> # * by transforming the coordinate system:
> qplot(carat, price, data=diamonds) + coord_trans(x = "log10", y = "log10")
>
> Michael
>
> On Sep 5, 2009, at 9:01 PM, stephen sefick wrote:
>
>> why not transform the y-data?
>>
>> On Sat, Sep 5, 2009 at 8:03 PM, Michael Kubovy<kubovy at virginia.edu> wrote:
>>>
>>> Hi,
>>>
>>> Does anyone know how to do a coord_trans() in which the y-axis is
>>> tranformed
>>> into (for example) -1000/y?
>
>> Stephen Sefick
>
>
>
> _____________________________
> Professor Michael Kubovy
> University of Virginia
> Department of Psychology
> USPS:     P.O.Box 400400    Charlottesville, VA 22904-4400
> Parcels:    Room 102        Gilmer Hall
>      McCormick Road    Charlottesville, VA 22903
> Office:    B011    +1-434-982-4729
> Lab:        B019    +1-434-982-4751
> Fax:        +1-434-982-4766
> WWW:    http://www.people.virginia.edu/~mk9y/
>
> ______________________________________________
> 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.
>



-- 
http://had.co.nz/