Displaying 4 results from an estimated 4 matches for "abserr".
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abs_err
2008 May 07
3
function in nls argument
...ction "optim.fun" and want as output the
sum of squared errors between predicted and measured
values, as follows:
optim.fun <- function (ST04, SM08b, ch2no, a, b, d, E)
{
predR <-
(a*SM08b^I(2)+b*SM08b+d)*exp(E*((1/(283.15-227.13))-(1/(ST04+273.15-227.13))))
abserr <- abs(ch2no-predR)
qnum <- quantile(abserr, probs=0.95, na.rm=T)
is.na(abserr) <- (abserr > qnum)
errsq <- sum(abserr^2, na.rm=T)
errsq
}
Then I want to optimize parameters a,b,d and E as to
minimize the function output with the follo...
2005 May 09
2
use "integrate" for functions defined in C, not R
...o "call_dqags", I define a C function "my_call_dqags" that
has it's own parameters of "lower, upper" and etc define in C, instead of
parsing from R. And I call
Rdqags(Cintfn,
&lower, &upper, &epsabs, &epsrel, &result,
&abserr, &neval, &ier, &limit, &lenw, &last, iwork, work);
instead of
Rdqags(Rintfn, (void*)&is,
&lower, &upper, &epsabs, &epsrel, &result,
&abserr, &neval, &ier, &limit, &lenw, &last, iwork, work);
I am not passi...
2004 Nov 18
0
Calling Rdqags doesn't produce correct result.
...n Rdqags()
from my C
program for numerical integration. Following are the C
program
and the corresponding R program:
C program
---------
void test(double *a,
double *b,
double *epsabs,
double *epsrel,
double *result,
double *abserr,
int *neval,
int *ier,
int *limit,
int *lenw,
int *last,
int *iwork,
double *work,
double *exx)
{
void *ex;
ex = exx;
Rdqags(tmpfun, ex, a, b, epsabs, eps...
2007 Jan 19
8
kate editor for R
Like kile for LaTeX, Linux/KDE's kate editor is an excellent editor for
R, with easy code submission to a running R process. Syntax
highlighting is good. I have not been able to figure out two things:
- how to automatically reformat a line or region of text using good
indentation rules (Emacs/ESS make this so easy by just hitting Tab while
the cursor is in a line, or highlighting a