[GSoC-PortA] chart.* as generics

[Doug Martin]

Ross,

 

Is there a vignette yet for using these chart functions?  If not, a couple
of code examples?

 

Doug

 

 

From: gsoc-porta-bounces at lists.r-forge.r-project.org
[mailto:gsoc-porta-bounces at lists.r-forge.r-project.org] On Behalf Of Ross
Bennett
Sent: Monday, August 19, 2013 10:17 PM
To: PortfolioAnalytics
Subject: Re: [GSoC-PortA] chart.* as generics

 

Brian,

 

I have just a couple quick questions regarding chart.Weights and
chart.RiskReward as generic functions and cleaning up the documentation as
you did with the versioned functions.

 

My plan is to use an alias for the chart.Weights.* functions for the
different classes and then have a generic chart.Weights function with a call
to UseMethod("chart.Weights"). The first argument is RP for
chart.Weights.RP, DE for chart.Weights.DE, and so on. Should the arguments
of the chart.Weights.* functions be the same?

 

Should we have the @param and other tags only for one function? Would that
go on the generic chart.Weights function?

 

My approach would be the same for the chart.Scatter.* functions.

 

Thanks,

Ross

 

On Sun, Aug 18, 2013 at 1:21 PM, Brian G. Peterson <brian at braverock.com>
wrote:

Sounds good.  - Brian



On 08/18/2013 03:06 PM, Ross Bennett wrote:

Brian,

Thanks for clarifying, I was worried that might be the case. I could add
a new function named chart.RiskReward and make that our generic function
and use an alias for the existing chart.Scatter.* functions. It could
look something like this:

chart.RiskReward.optimize.portfolio.ROI <- chart.Scatter.ROI
chart.RiskReward.optimize.portfolio.random <- chart.Scatter.RP

Would that be ok and worthwhile to do?

Ross



On Sun, Aug 18, 2013 at 12:05 PM, Brian G. Peterson <brian at braverock.com

<mailto:brian at braverock.com>> wrote:

    On 08/18/2013 01:35 PM, Ross Bennett wrote:


        The PerformanceAnalytics packages already has a chart.Scatter
        function.
        Will we have any naming or masking issues if I make chart.Scatter a
        function for the different optimize.portfolio.objects?


    It's easy to make chart.Weights a generic, but it will be much
    harder with chart.Scatter.*

    Because PerformanceAnalytics is on CRAN and much more widely used,


    we'd need to match the argument list, and create a
    chart.Scatter.default in PerfA.  I don't see any way to match the
    argument list though.

    --
    Brian

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