Displaying 5 results from an estimated 5 matches for "myfunc1".
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2002 Nov 07
5
From RISKS: secret scrubbing code removed by optimizers
This showed up in RISKS and no one has mentioned it here yet, so..
OpenSSH contains lots of code like:
char *password = read_passphrase(prompt, 0);
[do stuff]
memset(password, 0, strlen(password));
2010 Sep 07
5
question on "optim"
...e the estimated parameters. but the paramter w[5] is a key one
for me.
now my questions is: what reason lead to the first?equation does not work and
the way to correct it to make it work?
?I wish I made the queston clear and thanks for any suggestion.
Nan
from Montreal
#the function
myfunc1<-function(par,data) {
# define the parameter matrix used in following part
vbar2<-matrix(0,n,nt)
vbar3<-matrix(0,n,nt)
v8 <-matrix(0,n,nt)
regw<-matrix(0,n,nt)
wden<-matrix(0,n,nt)
lia<-matrix(0,n,nt)
ccl<-matrix(1,n,ns)
eta<-c(0,0)
# setup the parts for loglikelihood
q...
2010 Aug 17
1
replace loops with matrix
...ers
I am using?numerical method for my research paper and the computation burden is
very heavy. first I tried to do it with loops, example code as following, and it
take hours to converge for only 200 obs. and my real data has 4000 obs. and the
optimization command that I use is:
optim(guess,myfunc1,data=mydata, method="BFGS",hessian=T))
then I tried matrix form?computation, it takes only 1/10 of the time the loop
method takes. it may still have room to improve it. at least, the?following
part?looks ugly.
ccl[,m]<-lia[,1]*lia[,2]*lia[,3]*lia[,4]*lia[,5]
any suggestion are app...
2000 Apr 26
1
Writing lgrindefs
Dear all,
I'm writing a lgrind definition for R. Lgrind is a program to produce
pretty program listings for inclusion in LaTeX documents. Does anybody
here have any experience with lgrindefs?
My definition now looks like this:
R:\
:pb=^\d?\p\d<-\dfunction\(\a\):\
:bb={:be=}:cb=\d#:ce=$sb=":se=\e":lb=':le=\e':id=.:\
:zb=@:ze=@:tb=%%:te=%%:mb=%\$:me=\$%:vb=%\|:ve=\|%:\
2000 Apr 26
1
Writing lgrindefs
Dear all,
I'm writing a lgrind definition for R. Lgrind is a program to produce
pretty program listings for inclusion in LaTeX documents. Does anybody
here have any experience with lgrindefs?
My definition now looks like this:
R:\
:pb=^\d?\p\d<-\dfunction\(\a\):\
:bb={:be=}:cb=\d#:ce=$sb=":se=\e":lb=':le=\e':id=.:\
:zb=@:ze=@:tb=%%:te=%%:mb=%\$:me=\$%:vb=%\|:ve=\|%:\