Displaying 6 results from an estimated 6 matches for "ab5".
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2005 Mar 11
2
Calculating lengths of runs of 0 or 1 sequences in meteorological data
Dear List Members,
I need some help about programming in S language. My
problem is as follows:
I have meteorological data (about rainfall measurement
each day from 1989-2002), say like
http://www.angelfire.com/ab5/get5/data.rainfall.txt
or http://www.angelfire.com/ab5/get5/R.rainfall.txt
in a sequence of 0(denoting dry day)'s and 1(denoting
wet day)'s. I want to construct a frequency
distribution table of various lengths
(1,2,3,4,5,6,7,8,9,or more) of observed wet spells
(number of successive 1'...
2012 Mar 04
1
Could not compute QR decomposition of Hessian.
...=
vars, :
Could not compute QR decomposition of Hessian.
Optimization probably did not converge.
######### Model ########
mDPDF =
data.frame(mj1,mj2,mj3,mj4,mj5,eL1,eL2,eL3,eL4,eL5,aC1,aC2,aC3,aC4,disR1,disR2,disR3,disR4,disR5,
difR1,difR2,difR3,difR4,difR5,difR6,dC1,dC2,dC3,dC4,aB1,aB2,aB3,aB4,aB5,deh1,deh2,deh3,deh4)
mydata.cov <- cov(mDPDF)
model.mydata <- specify.model()
MJ -> mj1, NA, 1
MJ -> mj2, lam2, NA
MJ -> mj3, lam3, NA
MJ -> mj4, lam4, NA
MJ -> mj5, lam5, NA
EL -> eL1, NA, 1
EL -> eL2, lam7, NA
EL -> eL3, lam8, NA
EL -> eL4, lam9, NA
EL -> eL5,...
2004 Apr 14
4
Non-Linear Regression Problem
...topic "Self-starting non-linear regressions"
using negexp.SSival - but i can not solve my hypothetical problem using
that - my problem is :
Y = EXP(-(THETA * t)) with data below for estimating THETA:
t Y
1 0.80
4 0.45
16 0.04
Whatever i could do, is in http://www.angelfire.com/ab5/get5/nonlinear.PDF
Any response / help / comment / suggestion / idea / web-link / replies will
be greatly appreciated.
Thanks in advance for your time.
_______________________
Mohammad Ehsanul Karim <wildscop at yahoo.com>
Institute of Statistical Research and Training
University of Dhak...
2004 Apr 16
5
Non-Linear Regression (Cobb-Douglas and C.E.S)
...ial values are not good enough: How can
i make a grid search?
2. How can i estimate C.E.S Production Function [ Y = GAMA *
((DELTA*K^(-BETA)) + ((1-DELTA)*L^(-BETA)))^(-PHI/BETA) ] using the same
data? How to get the initial value?
N.B.: The data file is available at http://www.angelfire.com/ab5/get5/klein.txt
Any response / help / comment / suggestion / idea / web-link / replies will
be greatly appreciated.
Thanks in advance for your time.
_______________________
Mohammad Ehsanul Karim <wildscop at yahoo.com>
Institute of Statistical Research and Training
University of Dhaka, D...
2005 Jun 08
1
Fitting Theoretical Distributions to Daily Rainfall Data
Dear List Members,
I need a bit help about fitting some theoretical
distributions (such as geometric, exponential,
lognormal or weibull distribution) to the following
*dry spell*, *wet spell*, *cycles (Wet-Dry or
Dry-Wet)* from my meteorological (daily rainfall) data
http://www.angelfire.com/ab5/get5/R.rainfall.txt only
for rainy seasen (july - september) of 14 years only:
dryspell<-c(1,1,4,1,1,4,2,2,3,4,1,2,1,1,1,3,1,3,
2,3,1,2,3,3,2,2,6,2,1,1,3,1,2,1,4,4,1,1,2,1,1,2,
2,4,1,1,1,3,4,1,7,1,3,2,5,1,3,1,1,3,4,8,4,3,1,1,
1,2,3,1,1,2,1,1,2,2,2,3,3,13,13,7,1,1,1,1,7,3,2,
1,3,1,1,2,5,1,2,1,3,...
2005 Jun 22
2
r programming help
...+WET[19]*DRY[11]+WET[20]*DRY[10]+WET[21]*DRY[9]+WET[22]*DRY[8]+WET[23]*DRY[7]+WET[24]*DRY[6]+WET[25]*DRY[5]+WET[26]*DRY[4]+WET[27]*DRY[3]+WET[28]*DRY[2]+WET[29]*DRY[1]
)
Thank you for your time.
PS: if the above formula can not be seen correctly,
one can see details at
http://www.angelfire.com/ab5/get5/alt.ren.txt
----------------------------------
Mohammad Ehsanul Karim
Web: http://snipurl.com/ehsan
ISRT, University of Dhaka, BD