Just got the final part of my data logger/analyzer program to work.
I wanted to allow two files to be compared by overlaying the datalog files over each other on a chart.
Each file is located on the hard drive, and the files are loaded to the chart. The two slide controlls allow the files to be shifted in a circular way, so the data at the end of the file is added to the beginning during the read into the chart. The files are read over and over while the sliders let us shift them into alignment. once they are lined up, one can zoom in and examine the graphs.
The two zip files are here: