I am a novice at excel and have numerous data sets entered in excel in numerous different files and worksheets. I need to convert these columns of data values (some as large as 250 values in one column) to there ln value in order to run ln transformation statistics. I do not want to do this one at a time as I have a considerable amount of data values. How do I convert a whole column of data values into the ln equivalent, either in the original (same) column or having the formula give the ln into another column. Hope I made myself clear. Thanks for any and all help.