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Old 10-07-2009, 05:17 PM   #15
Senior Member
Location: China

Join Date: Sep 2009
Posts: 199

If I got a long list of contents:
scaff_123 20
scaff_223 60
scaff_122 1000
scaff_125 15
scaff_23 30
scaff_13 26
scaff_230 50
scaff_153 500
scaff_173 200

Based on the column two,
Do you have any idea how to calculate the N50 and N90 from this long list of contents?
I need to do descending order of this long list of contents before I calculate the N50 and N90,right?
Thanks again for your help
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