I am trying to perform an nls for a valid negative exponential function:
zz=nls(y~constant+a.est*2.7183^(b.est*x),start=list(constant=4.0,a.est=-4,b.est
= -.005),trace=T)
and am getting a number of different error messages, the most problematic
of which is Error in nls(ring.area ~ constant +
On 09/07/2010 1:51 PM, Jim Bouldin wrote:
I am trying to perform an nls for a valid negative exponential function:
zz=nls(y~constant+a.est*2.7183^(b.est*x),start=list(constant=4.0,a.est=-4,b.est
= -.005),trace=T)
and am getting a number of different error messages, the most problematic
of
1. The expression you gave us is clearly not the one that produced the
error: it involved ring.area and ba.beg.
2. You don't tell us what x and y are, so we can't reproduce anything.
Sorry, I guess that was unclear. I changed the response and independent
variable names to y and x
On 09/07/2010 2:36 PM, Jim Bouldin wrote:
1. The expression you gave us is clearly not the one that produced the
error: it involved ring.area and ba.beg.
2. You don't tell us what x and y are, so we can't reproduce anything.
Sorry, I guess that was unclear. I changed the response and
On 2010-07-09 13:29, Duncan Murdoch wrote:
On 09/07/2010 2:36 PM, Jim Bouldin wrote:
1. The expression you gave us is clearly not the one that produced
the error: it involved ring.area and ba.beg.
2. You don't tell us what x and y are, so we can't reproduce
anything.
Sorry, I guess that
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