Displaying 3 results from an estimated 3 matches for "deltaz".
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2013 Apr 10
0
Problem with ode
.../(um^2 + (alpha*I)^2)^.5
return(FI)
}
J1 = function(x){
n = 10^3
FI2 <- function(y)F.I(z = x, y)
J1 = sum(sapply(runif(n, 0, 16), FI2))*16/24/n
return(J1)
}
J = sapply(DEPTH, J1) #the factor of light limitation
deltaz <- c(rep(5, NB - 1), 2.5)
P.Flux <- -D*diff(c(P,0))/deltaz
Z.Flux <- -D*diff(c(Z,0))/deltaz
N.Flux <- -D*diff(c(N,N0))/deltaz
dP.dt = P*um*N/(N+Kn)*J - Z*Im*P^2/(P^2+Kp^2) - diff(c(0,P.Flux))/delz
dZ.dt = Z*(eps*Im*P^2/(P^2+Kp^2) - g*Z) - diff(c(0,Z.Fl...
2013 Jan 04
1
plm random effect: the estimated variance of the individual effect is negative
...Hi,R 2.15.2 plm() function on Windows 7
> I have a problem with the variance estimation in a random effect model
> I used this formula to get my result, and it works:reg <- deltaF ~
> L1.deltaF + L2.deltaF + deltaCDS + L1.deltaCDS + L2.deltaCDS +
> L3.deltaCDS + deltaUS_Yields + deltaZ + L1.deltaZ + L2.deltaZfixed
> <- plm(reg, data=Mody_R, na.action = na.exclude,
> index=c("country_id", "datestata"), model="random")
> but when i split my dataframe into several groups it gives me this
> error:"Error in swar(object, data, eff...
2012 Dec 29
2
I need intercept in plm model
Hi,R 2.15.2 plm() function on Windows 7
when i perform a plm regression, i can't manage to obtain the intercept, but I need it.it gives me just the beta coefficient.
my formula: fixed <- plm(deltaS ~ L1.deltaS + L2.deltaS, data=Mody_R, index=c("country_id", "date"), model="within")
my output: Coefficients : Estimate Std. Error t-value Pr(>|t|)