Question: kmer distribution curve shifts to right of poisson distribution
gravatar for deepti1rao
13 months ago by
deepti1rao20 wrote:

I plotted my kmer histogram generated by jellyfish and tried fitting it to the poisson distribution. What could be the probable reason for a shift to the right?

distribution poisson kmer • 330 views
ADD COMMENTlink modified 13 months ago by h.mon24k • written 13 months ago by deepti1rao20

Please provide context. What are you trying to do?

Poisson distributions can take various forms, by the way, and they differ based on the value of Lambda (λ). Both of your curves look Poison-like to me.

ADD REPLYlink written 13 months ago by Kevin Blighe41k
gravatar for h.mon
13 months ago by
h.mon24k wrote:

I guess the black curve is the actual kmer distribution, and the dashed green is the fitted poisson? I will assume yes:

The tails of your kmer distribution do not fit a poisson, and in particular, the peak of erroneous kmers is probably what is skewing the fitted distribution to the left.

ADD COMMENTlink written 13 months ago by h.mon24k
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