Error in Summary.factor(c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 4L, : max not meaningful for factors

Hi

Thanks Duncan. 

This is a package, SIAR. 

fo <- ordered(f) 
 > fo 

[1] a b c d e 
Levels: a < b < c < d < e 

 > max(fo) 

[1] e 
Levels: a < b < c < d < e 

The data set has 101 values, what can I use instead of letters? 

Why do you need to use letters? AFAIK this was only illustration what 
could be root of the error message. If the function requires ordered 
factor you can use

your.ordered.factor <- ordered(your.unordered.factor)

I do not remember original mail but to get rid of error message, the 
function probably needs as an input ordered factor or numeric values. You 
shall consult help page for this function which option is valid.

Regards
Petr

Best wishes, 

Alex. 

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