[Rd] Converting width for a grob where graphics parameters have length 0 crashes R

[Paul Murrell]

Hi

Thanks for bringing this (back) up.

It is still on my list, but now back nearer the top :)

Paul


On 14/11/2021 12:51 am, Gu, Zuguang wrote:
> Dear developers,
> 
> 
> In grid::gpar(), graphic parameters are not allowed to have length 0, 
> but this can be done by first creating a gpar object and later modifying it:
> 
> 
> gp = gpar(fontsize = 10)
> 
> gp$fontsize = numeric(0)
> 
> 
> when a grob has a gp where some parameters have length 0, converting the 
> width or height of this grob will crash R.
> 
> ?
> 
> A reproducible example is as follows:
> 
> 
>  > library(grid)
> 
>  > gp = gpar(fontsize = 10)
>  > gp$fontsize = numeric(0)
>  > gb = textGrob("foo", gp = gp)
>  > convertWidth(grobWidth(gb), "mm")
> [1] 21045 floating point exception R??
> 
> 
> Best regards,
> 
> Zuguang Gu
> 
> 
> [[alternative HTML version deleted]]
> 
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-- 
Dr Paul Murrell
Department of Statistics
The University of Auckland
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