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Does anyone know how to assign (column names only) to a matrix?

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thank you for your help! kinds Rikke -- View this message in context: http://r.789695.n4.nabble.com/Calibrating-the-risk-free-interest-rate-using-nlminb-tp3747509p3748442.html Sent from the R help mailing list archive at Nabble.com.

> require(lattice) Loading required package: lattice Error in library(package, lib.loc = lib.loc, character.only = TRUE, logical.return = TRUE, : 'lattice' is not a valid installed package > library(lattice) Error in library(lattice) : 'lattice' is not a valid installed package...

I see.. So apparently the different functions are doing the same thing! :-) Besides I didn't know the groups should have about the same size. Thank you four your time Mr. Dalgaard. -- View this message in context: http://r.789695...

I used: marketdata <- read.csv(file="S&P 500 calls, jan-jun 2010.csv", header=TRUE, sep=";") after changing my directory to where the file is saved. The data imported should be correct. The spot is equal to S0, I...

Hi Ben it's working good except no values of 4th column in output. And also if the file is large I'm getting the following error. Error in pf(q, df1, df2, lower.tail, log.p) : Non-numeric argument...

Hi there! I have following problem: I created some graphics with "win.metafile", which I wanted to use in a Powerpoint presentation, but when I paste them into Powerpoint the graphics are missing the axes. It looks like the axes...

is it possible to map 2 plots(c and d) in a single output plot? library(ggplot2) c <- ggplot(mtcars, aes(qsec, wt)) d <- ggplot (mtcars, aes(qsec, wt)) c + stat_smooth(fill="darkgrey", colour="blue", size=2, alpha = 0...

I didn't do any research about this but I think it's the following: If you run several t-tests to compare groups and then do a tukey-HSD you won't get the same results either. It's...

Dear Vera, I had a similar problem once and as far as I can remember the reason were some negative inputs or outputs. # Check for negative values x1a.neg <- apply(x1a, 1, function(x) any(x<0)) y1.neg <- apply...

I almost wasted 3 hours to make lattice functions work. :(. Phew! I installed package lattice, lattice extra and other supportive packages to use functions 1.make.groups 2.forplot 3.xyplot. I also tried local installing. They are installing very...

a1 is the first key in input. second column is x-axis and 3rd is y-axis and 4th is its corresponding key. Now for every key in 1st column I would like to calculate LR that gives p value...

Hi there, To see the results of my clustering graphically I was using clusplot. But it only provides a look at the two most important components of the dataset. I recently found the Mclust() function which produces very nice colored...

Thank you for the quick response! I think you are on the right track - but is there any way of "calling" (is that the word for it) the function price_call in the mapply, so that this price_call function...

For every specific V1 and V4 pair (ex:A and P) calculate Linear regression of V3(y-axis) and V2(x-axis) and print p value along with the pair (output). INPUT ############# V1 V2 V3 V4 A 1 2.5...

I think I have found my problem, but I dont know how to correct it. I have found an old post saying that it might be a problem if the starting values are evaluated at Inf (see link here http...

Hi I have created the following plot over the empirical returns.. What I now want to do is to overlay a curve/line with the normal density as a comparison of the two. Does anyone know how to do this...

Ok I see that point with the quotes. But what I want to do still doesn't work: a <- matrix(1:15,ncol=3) b <- paste( paste("a[," ,paste(1:3), "]",sep="") ,"^",1:3,sep="",collapse="+") b #[1] "a[,1...

Thank you for your improvement suggestions. I forgot to write the I() and it's clear that I have to specify the data (which I was indicating with the '...' without explicitly writing it). In this special case where I need...