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Question: about the use of subsetByFilter()
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gravatar for Bogdan
21 months ago by
Bogdan520
Palo Alto, CA, USA
Bogdan520 wrote:

Dear Martin, and all, 

would like to ask for an advice about the use of the function subsetByFilter(vcf, filter). 

I have the following piece of R code that is working (below) -- thanks Martin for suggestions !

vcf <- readVcf("AML_out.vcf.bgzip",genome="hg38")

AFADfilter = function(x) {
            af <- geno(x)$AF[,"TUMOR"] > 0.05
            ad <- sum(as(geno(x)$AD[,"TUMOR"], "List")) >= 5
            af & ad
                         }

z <- vcf[AFADfilter(vcf)]
writeVcf(z,"output.vcf")

However, if I want to use the function subsetByFilter(), there is an error message :

subsetByFilter(vcf, filter=AFADfilter)

Error in (function (classes, fdef, mtable)  : 
  unable to find an inherited method for function ‘subsetByFilter’ for signature ‘"CollapsedVCF", "function"’
vcf
ADD COMMENTlink modified 21 months ago by Martin Morgan ♦♦ 22k • written 21 months ago by Bogdan520
3
gravatar for Martin Morgan
21 months ago by
Martin Morgan ♦♦ 22k
United States
Martin Morgan ♦♦ 22k wrote:

The filter argument is supposed to be a FilterRules object, so

subsetByFilter(vcf, filter=FilterRules(list(AFADfilter=AFADfilter)))
ADD COMMENTlink modified 21 months ago • written 21 months ago by Martin Morgan ♦♦ 22k

I see, it is a same rule as before, when filtering on VCF files, and not working on VCF objects. Thanks a lot Martin, have a happy, warm and fruitful week !

ADD REPLYlink written 21 months ago by Bogdan520
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