Displaying 4 results from an estimated 4 matches for "omega1".
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2000 Feb 04
2
constrained optimiser doesn't obey constraints (PR#411)
...alue it eventually reports convergence, for
some others it goes forever.
---Example code---
revise.mix.binbb_function(x,loss,no.inform){
if (any(is.nan(x)) || any(x<0) || any(x>c(1,1,.5,1))){
print(paste("x=",x))
return(Inf)
}
eta_x[1]
pi1_x[2]
omega1_x[3]
p0_x[4]
log.term_0
for (i in 1:length(no.inform)){
if ( (loss[i]-1) >= 0) {
first.prod_1
for (r in 0:(loss[i]-1)){
first.prod_first.prod*(pi1+r*omega1)
};} else {first.prod_1;}
if ( (no.inform[i]-loss[i...
2009 Jul 15
0
time series fiting and residual computing
...have CO2 timeseries which I want to fit with fourth harmonic function and
then would like to compute residuals.
I tried with two option but not sure which one is correct, kindly any one
can help correcting me:
#
#I would like to fit a model with Fourth harmonic function as:
#m(t)=a+bt+ct^2+c1sin(omega1*t)+d1cos(omega1.t)+c2sin(omega2.t)+d2cos(omega2.t)+c3sin(omega3.t)+d3cos(omega3.t)+c4sin(omega4.t)+d4cos(omega4.t)
# In my data 'file' I have two variable 'co2obs' and 'time'
# SO above function in R will look like EITHER as:
testfit<-lm(co2obs~1+time+(time^2)+sin(2*pi*t...
2004 Dec 09
0
elliptic functions
...un's
beautiful diagram on
p643 (figure 18.5).
The gsl package does sn, cn, dn et seq, but before I put a huge amount
of
effort in, has anyone else coded up any related material?
I'd be interested to hear if anyone has anything on Weierstrass's P
function (in particular,
computing omega1 and omega2 from general g2 and g3) and his
sigma functions. Jacobi's theta functions would be good too.
--
Robin Hankin
Uncertainty Analyst
Southampton Oceanography Centre
European Way, Southampton SO14 3ZH, UK
tel 023-8059-7743
2011 Oct 02
0
Arimax First-Order Transfer Function
...n97=1*(seq(airmiles)==13),Dec02=1*(seq(airmiles)==84)),method='ML')
# Additive outliers are incorporated as dummy variables in xreg.
# Transfer function components are incorporated by the xtransf and transfer
# arguments.
# Here, the transfer function consists of two parts omega0*P(t) and
# omega1/(1-omega2*B)P(t) where the inputs of the two transfer
# functions are identical and equals the dummy variable that is 1 at September
# 2001 (the 69th data point) and zero otherwise.
# xtransf is a matrix whose columns are the input variables.
# transfer is a list consisting of the pair of (MA order...