This Excel file is produced as a tutorial tool for circadian rhythms.
I hope if you use this file as a demo to explain concepts of period, phase, amplitude.
Though you can fit your data with a theoretical curve manually, each value of clock parameters calculated with this file is NOT accurate.
If you want to analyze circadian parameters in scientific purposes, mathematical analyses, such as FFT-NLLS or COSOPT, will be suitable (Straume M, 2004).
Currently, this is a Japanese version.