Displaying 2 results from an estimated 2 matches for "semilog".
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epilog
2003 Apr 23
3
Changing the size of the bounding box
Greetings all:
I have to create a graph that has very specific dimensions for
publication purposes. The graph is a semilog scaled graph and the
axes must range from 1 to 1,000,000 on the y axis and 0 to 100 on the
x axis. The x axis should be exactly 8 inches and the y axis should
be exactly 5.25 inches. I've been able to set the plot area to 8 x
5.25 using the par(pin=c(8,5.25)). The problem that I'm runnin...
2006 Apr 20
2
nlminb( ) : one compartment open PK model
...unction in this case was
squared error, and I made no assumptions about the distribution
of the plasma values. The model appeared to fit pretty well.
Out of curiosity, I decided to try to use nlminb( ) applied to
a likelihood function that assumes the plasma values are normally
distributed on the semilog scale (ie, modeling log(conc) over
time). nlminb( ) keeps telling me that it has converged, but
the estimated parameters are always identical to the initial
values.... I am certain that I have committed "ein dummheit"
somewhere in the following code, but not sure what... Any help
woul...