当拟合 nls.lm() 速率常数未拟合时 - 没有错误消息

Question

The whole problem is here: https://github.com/joschwrzr/linDiffModel

I am trying to fit a set of linear differential equations to a measured set of data using nls.lm() from minpack.lm in R. I took this blogpost as a draft. But in this case there is only one system reservoir measured: C

However, when fitting the model with nls.lm() the rate constants k1 and kh1 are not fitted (first and second position of Par = ) at all- WHY?

fitval=nls.lm(par=fitparms, fn=ssq, lower = rep(0, 5), control = nls.lm.control(nprint = 1), df = df)

It. 1, RSS = 3.14177e-12, Par. = 1.77e-09 0.003 6.33377 2.33646e-05 2.19591e-05

It. 2, RSS = 3.14177e-12, Par. = 1.77e-09 0.003 6.33407 2.33646e-05 2.1959e-05

It. 3, RSS = 3.14177e-12, Par. = 1.77e-09 0.003 6.33407 2.33646e-05 2.1959e-05```

Answer 1

变量mdlparms和parms应该被称为相同的