search for: fdist

R-help, I'm trying to work out the density function by doing: > df(5.22245, 3, 22) [1] 0.005896862 > df(15.20675, 6, 4) [1] 0.001223825 In excell the result is : 0.0071060464 <*> FDIST(5.22245,3,22) 0.0100001406 <--> FDIST(15.20675,6,4) >From my point of view the differences in the second case are substantial. Can anyone give me a hint on this? Thanks in advance ---------------------------------------------------------------- Luis Ridao Cruz Faroese Fishe...

...max(F)); # index of MSS (Most Significant Site) MSS = snp[,MSSid]; print (paste("MSS(Most Significant Site):", MSSid)); p0 = length(MSS[MSS==0])/N; p = min(p0, 1-p0); print (paste("assoc_freq:", p)); print (paste("assoc_var:", PRE[MSSid])); #lets do a permutation test Fdist <- perm.F(Y, snp[,1:S], 1000, sites); print ("permutation test maxF dist"); print (Fdist); pvalue <- mean(Fdist>F[MSSid]); print (paste("assoc_prob:", pvalue)); # close the output file sink() -----------------------------------------------------------------------------...

...on pnf() --- which in turn leads to the function dnbeta() already available in the stats package for some time. You may find this code in http://www.uni-bayreuth.de/departments/math/org/mathe7/R-devel/dnf.tar.gz This archive includes the C-File dnf.c as well as some adapted versions Fdist_new.Rd and distn_new.R; in the latter two files I indicated all modifications w.r.t. Fdist.Rd and distn.R by a corresponding %%-tag. You may modify these files as you like in order to conform your design principles --- and hopefully we will soon have df() for ncp, too... Best,...

...ush(stdout()) > > ### Name: Exponential > ### Title: The Exponential Distribution > ### Aliases: Exponential dexp pexp qexp rexp > ### Keywords: distribution > > ### ** Examples > > dexp(1) - exp(-1) #-> 0 [1] 0 > > > > cleanEx(); ..nameEx <- "Fdist" > > ### * Fdist > > flush(stderr()); flush(stdout()) > > ### Name: FDist > ### Title: The F Distribution > ### Aliases: FDist df pf qf rf > ### Keywords: distribution > > ### ** Examples > > ## the density of the square of a t_m is 2*dt(x, m)/(2*x)...

All, I am using a sum of squared differences in the objective function of an optimization problem I am doing and I have managed to speed it up using the outer function versus the nested for loops, but my suspicion is that the calculation could be done even quicker. Please see the code below for a simple example. If anyone can point out a faster way I would appreciate it greatly. Thanks, Roger

....90.29/specs gcc version pgcc-2.90.29 980515 (egcs-1.0.3 release) gstat03(27)% g77 -v Reading specs from /s/egcs-1.0.3a/i386_linux22/lib/gcc-lib/i386-redhat-linux/pgcc-2.90.29/specs gcc version pgcc-2.90.29 980515 (egcs-1.0.3 release) The last part of base-Ex.Rout is > ###--- >>> `FDist' <<<----- The F Distribution > > ## alias help(df) > ## alias help(pf) > ## alias help(qf) > ## alias help(rf) > > ##___ Examples ___: > > df(1,1,1) == dt(1,1)# TRUE [1] TRUE This does not seem to happen on other Linux machines with othe...

Hi, I was wondering if someone can help me interpret the results of running weibreg. I run the following and get the following R output. > weibreg(Surv(time, censor)~covar) fit$fail = 0 Call: weibreg(formula = Surv(time, censor)~covar) Covariate Mean Coef Rel.Risk L-R p Wald p covar 319.880 -0.002 0.998 0.000 log(scale) 0.000 8.239

...e/R-ex/Control.R action: create D: file: /usr/local/lib/R/library/base/R-ex/Exponential.R action: create D: file: /usr/local/lib/R/library/base/R-ex/Extract.R action: create D: file: /usr/local/lib/R/library/base/R-ex/Extremes.R action: create D: file: /usr/local/lib/R/library/base/R-ex/FDist.R action: create D: file: /usr/local/lib/R/library/base/R-ex/Formaldehyde.R action: create D: file: /usr/local/lib/R/library/base/R-ex/GammaDist.R action: create D: file: /usr/local/lib/R/library/base/R-ex/Geometric.R action: create D: file: /usr/local/lib/R/library/base/R-ex/HairEyeCol...

...text html latex Devices text html latex Exponential text html latex example Extract text html latex example Extremes text html latex example FDist text html latex example Foreign text html latex Formaldehyde text html latex example GammaDist text html latex example Geometric text h...