Andrew Stevens

This code worked fine for the example that I tried. Here are a couple comments and questions that I think, if addressed, will improve the code and clarify its function.

1)The help section is in a non-standard format and an H1 line would be useful.
2) What does the code do with repeat x and y values?
3) What is the cell-size of the resulting grid? Answers to 2 and 3 should be added to the help section.
4) Efficiency: This code uses a triple loop to fill the grid. For large datasets, this will be extremely slow. An alternative approach is to use a combination of HISTC and ACCUMARRAY to populate the grid that will be fast.

-Andrew

Colin,

Thanks for your comments. I found after playing with a couple examples, I determined that if I simply change the output filename from .txt to .asc that the file can be read directly into arc without doing the raster conversion.

I would also be careful with your modification of the way the header is written in the output file. Your modification forces the cell-size to be an integer which would produce a large error in many of my datasets.

Andrew

@ Carlos: "I think this was the idea of VARYCOLOR, but it missed it."

I don't see this as being the case. The purpose of VARYCOLOR is to create a colormap with maximum color variation. The purpose of this function seems to be applying a colormap to lines in an axes. They seem to have completely different purposes.