[R-SIG-Finance] chart.PerformanceAnalytics(), character string is not in a standard unambiguous format

[Brian G. Peterson]

Is your date index a Date class, or a character string?  If it is of 
class Date or YearMon, I wouldn't anticipate any problems, but if your 
row names are characters, the error would be because the charting 
function doesn't know how to create the x axis labels.

For example, as.xts(z) would likely give you the same error if you have 
character strings for the dates.

Regards,

    - Brian

Khanh Nguyen wrote:
> Hi all,
>
> I ran into this error "Error in fromchar(x) : character string is not
> in a standard unambiguous format"" when I run
> charts.PerformanceSummary(). I guess that I probably messed up the
> dates in my data somehow.
>
>   
>> z <- Return.calculate(stb.agg$STB.Close, method=c("compound", "simple")) #stb.agg is my monthly price history
>> head(z)
>>     
>                  STB
> Aug 2006  0.01250428
> Sep 2006  0.05904603
> Oct 2006 -0.05970026
> Nov 2006  0.05846646
> Dec 2006  0.09671211
> Jan 2007  0.26135075
>
>   
>> dput(z)
>>     
<...>
>   
>> charts.PerformanceSummary(z)
>>     
> Error in fromchar(x) :
>   character string is not in a standard unambiguous format
>
>   
-- 
Brian G. Peterson
http://braverock.com/brian/
Ph: 773-459-4973
IM: bgpbraverock