Displaying 4 results from an estimated 4 matches for "c_m".
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2011 Apr 15
1
How to generate a correlation matrix with restrictions on its eigenvalues
Dear All,
I would like to generate m positive real numbers c_i, I=1,...,m, such that
(1) c_1 + c_2 + ... + c_m=m,
(1) after being ordered into c_1 >= c_2 >= .... >=c_m>0, we have that c_m is of the same order of m^(-1/8), when m is sufficiently large.
Thanks,
-Chee
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2006 Dec 30
4
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2013 Apr 09
1
Solving an integral in R gives the error “The integral is probably divergent”
I am trying to solve an integral in R. However, I am getting an error when
I am trying to solve for that integral.
The equation that I am trying to solve is as follows:
$$ C_m = \frac{{abs{x}}e^{2x}}{\pi^{1/2}}\int_0^t t^{-3/2}e^{-x^2/t-t}dt $$
[image: enter image description here]
The code that I am using is as follows:
a <- seq(from=-10, by=0.5,length=100)
## Create a function to compute integrationCfun <- function(XX, upper){
integrand <- function(x)x^(-...
2013 Feb 18
1
attempt to apply non-function
...c())
})
}
times<-seq(from=1, to=100, by=0.1)
parms<-c(I_ext=6.5,
g_Af=0.7, g_As=1.2, g_K=0.42, g_KCa=5.9, g_CaT=0.21, g_CaS=0.047,
g_L=0.1, g_Na=2300,
E_K=-86, E_L=-50, E_Ca=40, E_Na=50,
vA=-43,
k_KCa=600, C_Ca = 300, k_Ca=360, k_Af=45, k_As=10, k_h=500,
C_m=0.0017)
init<-c(v=-50, h_Na=0.52, m_Ca=0.52, m_CaT=0.52, m_CaS=0.52, h_CaT=0.52,
m_K=0.52, m_KCa=0.52, h_KCa=0.52,
m_A=0.52, h_Af=0.52, h_As=0.52)
out<-ode(y=init, times=times, func=G1999, parms=parms, method="lsoda")
Many thanks
Jannetta
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