Question: ChAMP: Error using champ.norm() function
gravatar for jdangelo
4.0 years ago by
United States
jdangelo0 wrote:


I am currently trying to use the ChAMP package in R on a set of 60 samples and have run into a problem with the champ.norm() function. 

I am using ChAMP version 1.4.1 and 64-bit R version 3.1.2 and am using a cluster with 16GB of RAM. 

The error, when running champ.norm() is:

Error in density.default(beta1.v[class1.v == 1]) : 
  need at least 2 points to select a bandwidth automatically
In addition: Warning message:
In max(beta1.v[rand.idx[subsetclass1.v == 1]]) :
  no non-missing arguments to max; returning -Inf


I have been looking at other posts to see if this question has been solved but to no avail. Most of the suggestions say to make sure all of my versions are current or memory issues when using too large of a data set, but I have the most recent versions, and am only trying to run ChAMP on 60 samples. 

These are the posts I have looked at:!topic/epigenomicsforum/w1ytMQkA3eI!topic/epigenomicsforum/NLeJ32kQrQA!msg/epigenomicsforum/w1ytMQkA3eI/L8V5T3ArDgoJ


Any help or suggestions would be greatly appreciated.




epigenetics champ methylation • 774 views
ADD COMMENTlink written 4.0 years ago by jdangelo0
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