understanding the data from the ucsc table browser

Question

[a4appy23]

im trying to find the intron length distribution of the hg18 assembly downloaded from the table browser.the refseq file has the following columns in iti calculated gene length by txstart-txend and made a plot of the distribution..however i need to find the intron length .

"bin" "name" "chrom" "strand" "txStart" "txEnd" "cdsStart" "cdsEnd" "exonCount" "exonStarts" "exonEnds" "score" "name2" "cdsStartStat" "cdsEndStat" "exonFrames"

Answer 1

[Pierre Lindenbaum]

I need to find the intron length from this data.

length of ith intron:

intronLength +=  $exonStarts[ith+1] -  $exonEnds[ith]  )