Extracting all individual columns from a 2D wave and performing exponential fit on them

Hi all,
I am having a data set of 245 by 106 , I want to extract 100 points from every column and perform an exponential fit on the data and extract the coefficients corresponding to each individual column fit. Can anyone help me on how I can do that ?
I'd go for a loop covering the columns and use the subrange options of curvefit:
displayhelptopic "Curvefit" // go down to "Wave Subrange Details"


HJ