This code generates a sine curve with a random period, and then generates 3 data sets with that period. Then all of the points from each data set except a few are removed.
Full Sine Curve | Randomized Period
This is an example of a randomly generated sine curve with no points taken away.
Sample Sine Curve | Limited Data
This is an example of a randomly generated sine curve with all of the points but a few taken away.
Sample Excel SpreadSheet
This is an sample of what the generated excel spreadsheet looks like. The "real" period is in the "F" column.