search for: fraction

Displaying 20 results from an estimated 1977 matches for "fraction".

2010 Dec 14
0
problems with lattice barchart
Hello everybody! I??m trying to create figures summarizing the abundance of a given species (y), by its length classes (x), year (conditional factor) and a grouping named as "fraction". I am using the lattice??s barchart but some problems arises: When I run the function, the sizes become characters, and this is the starting problem for me when trying to adjust the x-axis in order to achieve a good-looking. In particular, I have found that when range of...
2023 Jan 07
2
gmp::bigq vs. MASS::fractions
Hi, has someone experience which routine should be used for creating fractional numbers? The two conversion routines deliver different results > x <- (0:7)/7 > MASS::fractions(x) [1] 0 1/7 2/7 3/7 4/7 5/7 6/7 1 > gmp::as.bigq(x) Big Rational ('bigq') object of length 8: [1] 0 2573485501354569/18014398509481984 2573485501354569/90071992547409...
2011 Feb 08
1
Simulation of Multivariate Fractional Gaussian Noise and Fractional Brownian Motion
Dear R Helpers, I have searched for any R package or code for simulating multivariate fractional Brownian motion (mFBM) or multivariate fractional Gaussian noise (mFGN) when a covariance matrix are given. Unfortunately, I could not find such a package or code. Can you suggest any solution for multivariate FBM and FGN simulation? Thank you for your help. Best Regards, Ryan ----- Wonsang Yo...
2013 Oct 15
2
Data handling
Hello all, I'm having a problem with data handling. My input data is (dput in the after the signature): Date Time Fraction 06/19/13 22:15:39 0.3205 06/19/13 22:15:44 0.3205 06/19/13 22:15:49 0.3205 06/19/13 22:15:54 0.3205 06/19/13 22:15:59 0.3205 06/19/13 22:16:09 0.3205 Date in format month/day/year, Time in HH:MM:SS and fraction represents the fractions of seconds. I need to have a vector in a for...
2005 May 25
3
Rounding fractional numbers to nearest fraction
Hi all, I've got a matrix of fractional data that is all positive and greater than zero that I would like to "loosely" classify, for lack of a better word. It looks something like this : 1.07 1.11 1.27 1.59 0.97 0.76 2.23 0.98 0.71 0.88 1.19 1.02 What I'm looking for is a way to round these number...
2009 Jun 22
2
Help needed: Fraction for Histogram > 1 ???
I have been trying to draw histogram for my manscript and found some strange things that I could not figure out why. Using the same code listed below I have successfully draw histograms for a few figures with fraction labeled on Y axis less than 1 (acturally between 0 to 0.1). But one dataset gives the Y axis label 0 to 5 as fraction. This is not true, as fraction are less than 1, although the value distribution on the figure seems to me is right. The only difference between the first few datasets and last da...
2007 Sep 13
6
Number -> Fraction
Hi everybody! I'm new to this list and also to the R program. I'd like to know if there is a function able to convert results into Fractional form like my scientific calculator have. For example: > 1/3 [1] 0.3333333 > function_that_return_a_fraction_from_numbers(0.3333333) [1] 1/3 Thanks Mauro -- Man, he is constantly growing and when he is bound by a set pattern of ideas or way of doing things, that's when he stops...
2010 May 01
1
bag.fraction in gbm package
Hi, Dear Greg, Sorry to bother you again. I have several questions about the 'gbm' package. if the train.fraction is less than 1 (ie. 0.5) , then the* first* 50% will be used to fit the model, the other 50% can be used to estimate the performance. if bag.fraction is 0.5, then gbm use the* random* 50% of the data to fit the model, and the other 50% data is used to estimate the predictive performance. Is my un...
2009 May 26
2
Problem with fractional seconds
Dear List, I am having problems converting a file with fractional seconds to class POSIXct. I have set my options to include digits.secs and my format to just time, but my output is the current date with my time lacking the fractions of a second. For example: options(digits.secs=3) t<-c("06:00:00.100","06:00:01.231") myt<-as.POSIX...
2009 Jul 29
1
Showing time progression on (triangle) plots
Hi, I have made some nice triangle plots showing the projected airborne, landborne and oceanborne fraction of anthropogenic emitted carbon dioxide at 10 year intervals for the next century. Currently all ten points on my plot are identical so I can't distinguish between them. I would like to be able to track the trend as the century progresses. How can I show the time progression on the plot (I...
2014 Jul 08
3
Possible memdisk issue
On 07/08/2014 05:55 PM, H. Peter Anvin wrote: > On 07/08/2014 03:05 PM, Alexander Perlis wrote: >> >> Question: what's special about the transition from 8203KiB to 8204KiB? >> Both have CHS=8/64/32 and both involve a fractional end cylinder. > > Fractional cylinders with floppy disks is almost certainly a very bad thing. > Agreed, but that doesn't appear to be the issue here. Fractional 8203K FreeDOS does work, yet larger values, including non-fractional ones, do not. Alex
2007 Jun 25
3
fractional calculations
Hi All, is there a function in R that allows me to work with fractions without transforming them to floats (or whatever) in between? Something that would calculate something like: (1/2 + 1/8) * 1/2 = 5/16 without ever transforming to 0.5 and 0.125? Best, Federico -- Federico C. F. Calboli Department of Epidemiology and Public Health Imperial College, St Mary&...
2006 Jan 27
5
How to convert decimals to fractions
Dear all, Are there any functions to convert decimals to fractions in R? I have the result: > summary(as.factor(complete.ID)) 0 0.0133333333333333 0.04 2256 488 230 0.0666666666666667 0.0933333333333333 0.106666666666667 2342 310 726...
2012 Sep 13
1
fractional balanced design conjoint analysis
L.S. We would like to generate fractional design for a conjoint analysis. For example we would like to reduce 2x2x2x2x3 --> 12-16 profiles. We tried the R-package "conjoint" and we found an article which describes how to make fractional design for these kinds of studies with Algdesign: http://tolstoy.newcastle.edu.au/R/e10/...
2000 Oct 19
2
Multiple outputs of a function
Hello everybody, I'm writting some functions for experimental designs. The one I'm working on is similar to "fac.design" on Splus. The problem I have is with the form of the output : When the argument fraction is submitted, Splus gives something like : A B C 1 - - - 2 + + - 3 + - + 4 - + + Fraction : ~A:B:C The first part of this output is the design, and the second part is the formula which allows to fractionate the full design. This output isn't a list. My problem is...
2023 Jan 07
1
gmp::bigq vs. MASS::fractions
On Sat, 7 Jan 2023 17:29:35 +0100 Sigbert Klinke <sigbert at wiwi.hu-berlin.de> wrote: > > x <- (0:7)/7 > > > MASS::fractions(x) > > [1] 0 1/7 2/7 3/7 4/7 5/7 6/7 1 > > > gmp::as.bigq(x) > > Big Rational ('bigq') object of length 8: > > [1] 0 > 2573485501354569/18014398509481984 2573485501354569/9007199254740992 > > [4] 7720456504063707/18014398509481984 > 257...
2012 Feb 05
1
fractional cointegration
Dear folk, I am stempting to estimate a vector error correction model using a seemingly fractionally integrated multivariate time series. The *fracdiff *package provides tools to estimate degree of fractional integration. But *fracdiff *can't help me to: 1. test equality of two degrees of fractional integration, say d1=d2? 2. estimate a multivariate cointegrating error correction model...
2006 May 27
2
boosting - second posting
...n.trees=3000, # number of trees + shrinkage=0.005, # shrinkage or learning rate, + # 0.001 to 0.1 usually work + interaction.depth=3, # 1: additive model, 2: two-way interactions, etc. + bag.fraction = 0.5, # subsampling fraction, 0.5 is probably best + train.fraction = 0.5, # fraction of data for training, + # first train.fraction*N used for training + n.minobsinnode = 10, # minimum total weight needed in each node...
2006 Jul 25
2
convert decimals to fractions - sorted
...04761905 1 0.119047619047619 -1 0.214285714285714 -1 0.309523809523810 1 0 1 0 1 0.404761904761905 1 0.095238095238095 1 0.047619047619047 1 0.380952380952381 1 0.214285714285714 1 0.523809523809524 1 0 1 0.095238095238095" First, I make it as fractions and then sorted. I have played around to make it sort, but it didn't succes. df <- read.table(textConnection(a)) library(MASS) as.fractions(as.numeric(df[,2])) cbind(table(df[,2], df[,1]), summary(as.factor(df[,2]))) table(frac.fun(as.numeric(df[,2]),42), df[,1]) > table(frac.fun(as.num...
2007 Sep 03
2
Row-Echelon Form
I was looking for an R-package that would reduce matrices to row-echelon form, but Google was not my friend; any leads? If not, I wonder if the problem could be expressed in terms of constraint satisfaction...