getValue = function(pos, start, end, genes) {
  temp = filter(pos, start <= pos, pos <= end)
  small=genes[genes$check %in% temp,]
  justgenes=small$char
  justpos=small$pos
  outlist=list("pos"=justpos,"genes"=justgenes)
  return(outlist)
}

x=seq(1,100,by=5)
y=seq(3,100,by=5)
comb=cbind(x,y)
comb=as.data.frame(comb)
check=c(1,1,1,2,3,3,2,3,61,61,62,62)
chars=c("A","B","C","D","E","F","G","H","I","J","K","L")
table=cbind(check,genes)
output=sapply(check, getValue, start=x, end=y, genes=table)

Error in match.arg(method) : 'arg' must be NULL or a character vector

getValue = function(pos, start, end, genes) {
  pos=as.character(pos)
  temp = filter(pos, start <= pos, pos <= end)
  small=genes[genes$check %in% temp,]
  justgenes=small$char
  justpos=small$pos
  outlist=list("pos"=justpos,"genes"=justgenes)
  return(outlist)
}

Error in UseMethod("filter") :
  no applicable method for 'filter' applied to an object of class "character"