AFter the extensive input from folks here last week, and my examination of alternatives, I accepted the visual appearance of Gaussian curves in our model. As I check the plots for data errors I find a behavior change when the x-axis length is 14 rather than 100, and I do not understand why.
I would appreciate the ideas of the mathematically adroit here to help resolve the problem. However, if this is not the appropriate forum for such a discussion, please point me to the more appropriate one. Most of the plots cover a range of independent values of 0-100. Some are greater (e.g., 0-1,000 or 0-10,000). However, for pH the range is 0-14. The plots for pH do not consist of sigmoid curves (a 'Z-curve' from 0-7 and an 'S-curve' from 7-14); they are straight lines. The Gaussian curve does not approach zero on either end (0 or 14). I can provide the functions for these curves. I need to understand why the results change when the range of the independent variable is short and learn how to produce correct results. Rich -- Richard B. Shepard, Ph.D. | Integrity Credibility Applied Ecosystem Services, Inc. | Innovation <http://www.appl-ecosys.com> Voice: 503-667-4517 Fax: 503-667-8863 _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
