[R-SIG-Finance] displaying a traditional stock chart

[Dirk Eddelbuettel]

Hi Whit,

On 13 February 2007 at 09:19, Armstrong, Whit wrote:
| I was thinking of an R integrated chart.

But I assume you also both know that the basic R chart is static.  There is
no way around that. Hence eg Java as an alternative for dynamic chart
widgets.  Do play with iPlots etc example, it is quite nice for the iris
example to click on one of the species in a factor barplot and automagically
see the colors change in for the matching group in the scatter plot.
 
| I assume that that kind of behaviour would require some major changes to
| R internals.  Once nice implementation that I've seen which also

Depends. You can probably also also hack something quickly in RGtk2
(try install.packages("rattle") for a very powerful GUI in RGtk2) that 
would just refetch / replot in R. Possibly not the quickest solution
to run, but possibly the quickest to code.

| preserves the look and feel of R charts is the Rgl package.
| 
| http://rgl.neoscientists.org/gallery.shtml

I found rgl (which I started to package for Debian as soon as it
appeared) to be promising, but hard to use.  IIRC Duncan Murdoch
recently put another package 'on top of' rgl but I haven't looked
at it yet.

On to mail nb 2 with the reply to Tony's excellent suggestion (and yes,
please do make the svg device public)  


On 13 February 2007 at 11:36, Armstrong, Whit wrote:
| That sounds interesting.
[...] 
| It sounds like something like that would be out of the question with the
| SVG device, but for simple operations like zooming in and out, or
| highlighting date ranges SVG could be the way to go.
| 
| Let me know if you would like to pursue this.
| 
| One other solution I have thought about is using Trolltech's Qt 4.2,
| which has nice plotting facilities.  Now that it is available on Windows
| as well as Linux/Unix it is a viable option. (this pdf has a simple
| graphics view in it, page 2)
| http://www.trolltech.com/pdf/Qt_42_DS_A4_Web.pdf

I came the same conclusion and started to dabble with Qt and in particular
Qwt (the related non-Trolltech project for scientific widgets).  Qt offers
both OpenGL and SVG natively.  But so far, I only played with Qt3
functonality.  

Dirk

-- 
Hell, there are no rules here - we're trying to accomplish something. 
                                                  -- Thomas A. Edison