Hello again Maple forums, it's been a while but I'm confident I came to the right place :)
I'm trying to fit our data (attached: maphelp.mw) to this function of Z:
It has the linear parameters a-f and non-linear parameter Zc. Now if I just try and fit this I get the error "complex value encountered" because when Z
but then the fit doesn't optimize the parameters properly. I expect Zc to be around 0.91085 but when I give it my data it finds Zc to be the value of my lowest data point (0.95).
I know this is wrong because the residual standard deviation found with Zc forced to 0.9105 is about 5 orders of magnitude smaller than the standard deviation with Zc forced to 0.94999.
Thank you for taking the time to read this and help me out. I've attached a maple file (attached: maphelp.mw) that does what I outline. If you have any advice for me I'd love to hear it :)
From Mike Busuttil
University of Windsor