kolmogorov smirnov in r  cannot compute correct pvalues with tiesby joanne34567 Tags: kolmogorov smirnov, pvalues, ties 

#1
Jan1813, 10:13 AM

P: 13

Hi,
I'm trying to use the kolmogorov smirnov test in in R to compare one distribution with another. I'm getting the following error: cannot compute correct pvalues with ties I think this is because the dataset that I am using has in the first instance around 2000 values, and the second, 50000 values. A number of these are inherently going to be replicates of another number in the series (i.e. "ties"). I'm just wondering if this has implcations for the p value I have? Is the p value valid? Cheers all 



#2
Jan1913, 11:34 AM

Sci Advisor
P: 3,175

Did you read the R documentation for the ks.test function?
You could test the sensitivity of the pvalue empirically. Add small random perturbations to your data to generate new data sets that have more digits. See how much the p value changes. 


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