[R] stripchart with pch %in% 21:25 with bg

[Peter Ehlers]

Jean lobry wrote:
>> I think that it's a good idea, although I have rarely made use
>> of pch > 20.
>>
>> This reminds me to pass on a very belated thank-you to the
>> developer(s) who implemented the formula version for stripchart,
>> which I had promised to do myself quite a long time ago.
>> Thanks, folks!
>>
>> Peter Ehlers
> 
> Hi Peter,
> 
> this is a good point by the way: my workaround is a shameless hack that
> does not handle the case of the graphics:::stripchart.formula(),
> while for sure it should. I hope that more competent people are
> going to have a look at this.

stripchart.formula() works for me with your modification to
stripchart.default().

> 
> The pch %in% 21:25 are very helpfull in some situations such as
> in a 2X2 contingency table : circles for women, squares for males,
> statisticians in blue, politicians in red (change for your favorite
> dichotomous credo here).

But you don't need the 'bordered' pch for that.

Peter

> 
> Best,
> 
> Jean