Displaying 2 results from an estimated 2 matches for "5.099020".
2009 Aug 10
4
problem selecting rows meeting a criterion
When I try to select only those rows from the following data frame, called
"data", in which X > Y
X Y V3
2 2 1 8.062258
3 3 1 2.236068
4 4 1 6.324555
5 5 1 5.000000
6 1 2 8.062258
8 3 2 9.486833
9 4 2 2.236068
10 5 2 5.656854
11 1 3 2.236068
12 2 3 9.486833
14 4 3 8.062258
15 5 3 5.099020
16 1 4 6.324555
17 2 4 2.236068
18 3 4 8.062258
20 5 4 5.385165
21 1 5 5.000000
2006 Aug 15
4
nls
Is there anyway to change any y[i] value (i=2,...6) to make following NLS workable?
x <- c(0,5,10,15,20,25,30)
y <- c(1.00000,0.82000,0.68000,0.64000,0.66667,0.68667,0.64000)
lm(1/y ~~ x)
nls(1/y ~~ a+b*x^c, start=list(a=1.16122,b=0.01565,c=1), trace=TRUE)
#0.0920573 : 1.16122 0.01565 1.00000
#Error in numericDeriv(form[[3]], names(ind), env) :
# Missing value or