[R] package metafor: error when setting 'col' and 'at' for a forest plot

[David Winsemius]

On Jan 4, 2013, at 9:13 PM, Brian Z Ring wrote:

> I am using metafor to create forest plots. This code gives me the  
> expected
> plot (setting x axis tick marks):
>
> forest(forest$OR, ci.lb=forest$Low, ci.ub=forest$High,  at=log(c(. 
> 05, .25,
> 1, 10)), slab=forest$SNP, atransf=exp)
>
> As does this (setting colors):
>
> forest(forest$OR, ci.lb=forest$Low, ci.ub=forest$High,  col=c(1,2,3),
> slab=forest$SNP, atransf=exp)
>
> But if I try to set both 'at' and 'col':
>
> forest(forest$OR, ci.lb=forest$Low, ci.ub=forest$High,  col=c(1,2,3),
> at=log(c(.05, .25, 1, 10)), slab=forest$SNP, atransf=exp)
>
> I receive this error:
> Error in polygon(x = c(alim[2], alim[2] - (1.4/100) * cex * (xlim[2]  
> -  :
>  formal argument "col" matched by multiple actual arguments
>
> Any help greatly appreciated.

Can you reproduce this using the examples in the package help pages?

-- 

David Winsemius, MD
Alameda, CA, USA