
I am interested in using "multcompLetters" after running "kruskalmc" but
I'm a newbie and I'm not having luck figuring it out. I can run "kruskalmc" just fine, 
but after studying the documentation for "multcompletters" for a long time, 
I cannot figure out how to make it work. Any ideas? R input is below
>
>> #here is my data set
>> tst
>     Month Food_kg
> 1    Feb     4.7
> 2    Feb     4.9
> 3    Feb     5.0
> 4    Feb     4.8
> 5    Feb     4.7
> 6    May     4.6
> 7    May     4.4
> 8    May     4.3
> 9    May     4.4
> 10   May     4.1
> 11   May     4.2
> 12   Aug     4.8
> 13   Aug     4.7
> 14   Aug     4.6
> 15   Aug     4.4
> 16   Aug     4.7
> 17   Aug     4.8
> 18   Nov     4.9
> 19   Nov     5.2
> 20   Nov     5.4
> 21   Nov     5.1
> 22   Nov     5.6
>> #run the KW test
>> k = kruskal.test(Food_kg, Month)
>> k
>          Kruskal-Wallis rank sum test
>
> data:  Food_kg and Month
> Kruskal-Wallis chi-squared = 17.2561, df = 3, p-value = 0.000626
>
>> #run the kruskalmc
>> kr = kruskalmc(Food_kg, Month)
>> kr
> Multiple comparison test after Kruskal-Wallis
> p.value: 0.05
> Comparisons
>            obs.dif critical.dif difference
> Aug-Feb  3.650000    10.373791      FALSE
> Aug-May  6.333333     9.891022      FALSE
> Aug-Nov  9.450000    10.373791      FALSE
> Feb-May  9.983333    10.373791      FALSE
> Feb-Nov  5.800000    10.835071      FALSE
> May-Nov 15.783333    10.373791       TRUE


>> #now I want to run multcompLetters but I'm stuck
> 		 	   		  
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