search for: lplough

Hi, I am simply looking for the function that will allow you to look at the top 20 lines of a long dataset? LP On Mon, Nov 1, 2010 at 10:46 AM, Louis Plough <lplough@usc.edu> wrote: > Hi, > I am trying to generate all possible permutations (choose 2) of a vector, > b, for example--using 'combn' the combinations in only one direction are > generated... > > > b<-c(.1,.2,.3) > > combn(b,2) > [,1] [,2] [,3] > [1,...

Hi, I am trying to use xyplot to plot the relationship between size and day (y~x) by a food factor that has two levels, low and high. I have 3 reps per factor/day. I want the plots from each food treatment on the same axiss, so I used this code: xyplot(Size ~ Day, groups = Food, data = louis.data.means,col=1, pch=c(1,17), panel=function(x,y,groups,...){ panel.superpose(x,y,groups,...)

Hi, I have a number of genes (columns) for which I want to examine pairwise associations of genotypes (each row is an individual)...For example (see data below), I would like to compare M1 to M2, M2 to M3, and M1 to M3 (i.e. does ac from M1 tend to be found with bc from M2 more often than expected.) Down stream I will be performing chi square tests for each pair. But I am looking for a way to

Hi, I have a number of genes (columns) for which I want to examine pairwise associations of genotypes (each row is an individual)...For example (see data below), I would like to compare M1 to M2, M2 to M3, and M1 to M3 (i.e. does ac from M1 tend to be found with bc from M2 more often than expected.) Down stream I will be performing chi square tests for each pair. But I am looking for a way to

Hi, I am trying to test for pairwise associations between genotypes ( Rows=individuals, Columns =genes, data are up to 4 genotypes per gene, some with 2,3 or 4) where each chisquare comparison is different depending on the genes tested. The test is the observed multilocus (across columns for each individual) genotypes vs the expectation, which is the product of the individual frequency for each

Hi, I have binary (0,1) data for a trait as my response variable, and a dependent variable, genotype, with three classes (AA, AB, BB). I would like to plot this data so that across the three genoytpes, even though the points are all either 0 or 1, i want them to stack up or be seen using 'jitter'. So far I have been able to do this using xyplot {lattice} (code below) but could not get