title: Adding multiple integer ranges of values from a column in the ifelse statement in R
body: <p>I am dealing with genomic data and I have columns on nucleotide position and its conservation score (in a dataframe). I have data regarding which range of nucleotide positions are introns and which are exons. I want to create a third column and be able to specify which regions are introns (as "INTRON") and which are exons (as "EXON").</p>
  
  <p>As an example suppose in nucleotide positions 1-70000, I want to specify 10000-10200, 17800-21000, 43000-54000 as introns and remaining as exons in another column (hypothetical data). Is there a way of specifying multiple ranges of values from a column in the ifelse function, as that would more or less solve my problem. Is there a better way of doing it ?</p>