Question: kmer distribution curve shifts to right of poisson distribution
0
gravatar for deepti1rao
2.3 years ago by
deepti1rao30
deepti1rao30 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?

https://ibb.co/gfB9Pc

distribution poisson kmer • 609 views
ADD COMMENTlink modified 2.3 years ago by h.mon30k • written 2.3 years ago by deepti1rao30

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 2.3 years ago by Kevin Blighe61k
0
gravatar for h.mon
2.3 years ago by
h.mon30k
Brazil
h.mon30k 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 2.3 years ago by h.mon30k
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