Graphs and Data for Cetacean Society 2005 talk

San Francisco State University Physics and Astronomy Department SFSU Pacific Oceanography Project SFSU Private Area. WARNING: Material on this page is work in progress; results and conclusions may change without notice. ( research |PSM home |P&A Dept |SFSU ) Analysis for Talk to the San Francisco Cetacean Society, April 7, 2005.

Statistics, Graphs and Distributions. Data sample consists of about 750 calls from a "B-only"-calling whale. The calls, from 2001 day 284 (October 11), were scanned by hand. Each call was fit to a drooping sine wave, near 48 Hz (the third harmonic of the B call). The signal was pass-band filtered, an envelope calculated by averaging the squared signal, and a fit was carried out to a sine wave with linear droop, multiplying the envelope. 5 fits were carried out with successively longer time series. A sixth fit (the "cheating fit") uses 6000 points, the same as the fifth fit, but with the starting values of the parameters set to the best-guess values. MDH's analysis programs bfitexecR2.m, v. 50331, and fwritebfitexecR2.m, v. 50331. For comparison, a sequence of 62 "A-B" call pairs on day 285 (October 12) of 2001 was also studied.
Call intensity: plots of call intensity vs hour of the day.	Time between calls: time series	Time between calls, for Day 285 A-B call series: time series
Exit-status statistics, and conclusions.

Statistics, Graphs and Distributions. Data sample consists of about 750 calls from a "B-only"-calling whale. The calls, from 2001 day 284 (October 11), were scanned by hand. Each call was fit to a drooping sine wave, near 48 Hz (the third harmonic of the B call). The signal was pass-band filtered, an envelope calculated by averaging the squared signal, and a fit was carried out to a sine wave with linear droop, multiplying the envelope. 5 fits were carried out with successively longer time series. A sixth fit (the "cheating fit") uses 6000 points, the same as the fifth fit, but with the starting values of the parameters set to the best-guess values.

MDH's analysis programs bfitexecR2.m, v. 50331, and fwritebfitexecR2.m, v. 50331.

For comparison, a sequence of 62 "A-B" call pairs on day 285 (October 12) of 2001 was also studied.

Call intensity: plots of call intensity vs hour of the day.

Time between calls: time series

Time between calls, for Day 285 A-B call series: time series

Exit-status statistics, and conclusions.