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DoseResponse / drc

Fitting dose-response models in R
https://doseresponse.github.io/drc/
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Which method ("1", "2", "3", "4") did W2.2() use by default to obtain starting values? #21

Open guodudou opened 3 years ago

guodudou commented 3 years ago

Hello,

I am using "drm(FailRate ~ Mpa, fct = W2.2(), data = my_data)" to fit my data, and interested in understanding the method W2.2() used to obtain the starting values.

After checking the source code, seems like 4 methods are available, but I couldn't figure out how drm() calls the four methods or which method is the default. Also, I didn't find any related information online either. Can you please help explain the process?

Thank you very much and I am looking forward to your response!