Displaying 1 result from an estimated 1 matches for "gamma_star".
2007 Oct 28
0
Request for help with nls error
...ly, when I run the code, I keep getting the following
errors (they switch back and forth depending on when I run it):
Error in nlsModel(formula, mf, start, wts) :
singular gradient matrix at initial parameter estimates
Error in nls(ywt_vib ~ weightfunc_vib(time_vib, Wmax_star, tau_star,
gamma_star, :
step factor 0.000488281 reduced below 'minFactor' of 0.000976563
I'll put my code at the bottom of this email. Any help you can offer
regarding this error would be greatly appreciated. Thank you so much!!
Trena Phipps
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