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mailpuls
2005 Feb 19
2
Warnings by functions mean(), median()
Hello,
following functions doesnt work correct with my data: median(), geo.mean().
My datafiles contain more than 10.000 lines and six columns from a
flow-cytometer-measurment. I need the arithmetic and geometric mean and
median. For the calculation of the geometric mean i wrote following
function:
fix(geo.mean)
function(x)
{
n<-length(x)
2005 Jun 21
2
nls(): Levenberg-Marquardt, Gauss-Newton, plinear - PI curve fitting
Hello,
i have a problem with the function nls().
This are my data in "k":
V1 V2
[1,] 0 0.367
[2,] 85 0.296
[3,] 122 0.260
[4,] 192 0.244
[5,] 275 0.175
[6,] 421 0.140
[7,] 603 0.093
[8,] 831 0.068
[9,] 1140 0.043
With the nls()-function i want to fit following formula whereas a,b, and c
are variables: y~1/(a*x^2+b*x+c)
With the standardalgorithm