The install.packages() function in R is the automatic unzipping utility that gets and install packages in R. How do I find out what directory R has chosen to store packages? How can I change the directory in which R stores and accesses packages? ...
I've got a data frame in R, and I'd like to perform a calculation on all pairs of rows. Is there a simpler way to do this than using a nested for loop? To make this concrete, consider a data frame with ten rows, and I want to calculate the difference of scores between all (45) possible pairs. > data.frame(ID=1:10,Score=4*10:1) ID S...
Is there a way to import data from a JSON file into R? More specifically, the file is an array of JSON objects with string fields, objects, and arrays. The RJSON Package isn't very clear on how to deal with this http://cran.r-project.org/web/packages/rjson/rjson.pdf. ...
I am trying to make a faceted plot in ggplot2 of the coefficients on the regressors from two linear models with the same predictors. The data frame I constructed is this: r.together> reg coef se y 1 (Intercept) 5.068608671 0.6990873 Labels 2 goodTRUE 0.310575129 0.5228815 Labels 3 indiaTRUE -1....
I have a data.frame in R that looks like this: score rms template aln_id description 1 -261.410 4.951 2f22A.pdb 2F22A_1 S_00001_0000002_0 2 -231.987 21.813 1wb9A.pdb 1WB9A_4 S_00002_0000002_0 3 -263.722 4.903 2f22A.pdb 2F22A_3 S_00003_0000002_0 4 -269.681 17.732 1wbbA.pdb 1WBBA_6 S_00004_0000002_0 5 -258.621...
Hello, I'm trying to create a stacked bar graph with variable coloring in each stacked bar; that is, one bar has say blue on top of red, the next one red on top of purple, etc. I also wanted to preserve the ability to stack graphs. Thank you so much guys. Adam ...
Why is my legend faded in these examples below? Notice how the colours in the legend are not as vivid as the colours in the plot: library(ggplot2) r <- ggplot(data = diamonds, aes(x = carat, y = price, color = cut, group = cut)) r + geom_smooth() #(left) r + geom_smooth(size = 2) #(right) EDIT: added a close-up ...
library(ggplot2) This code produces a nice looking plot: qplot(cty, hwy, data = mpg, colour = displ) + scale_y_log2() + labs(x="x axis") + labs(y="y axis") + opts(title = "my title") But I want to setup variables to try and to reduce code repetition: log_scale <- scale_y_log2() xscale <- labs(x="x axis") yscale <- labs(y="y a...
Is there a constant that stores the machine epsilon in R? ...
I'm using the "by" function in R to chop up a data frame and apply a function to different parts, like this: pairwise.compare <- function(x) { Nright <- ... Nwrong <- ... Ntied <- ... return(c(Nright=Nright, Nwrong=Nwrong, Ntied=Ntied)) } Z.by <- by(rankings, INDICES=list(rankings$Rater, rankings$Class), FUN=pairwise.compare) The resu...
Does anyone have examples/tutorials of exception handling in R? The official documentation is very terse. ...
Hi, I have a nested loop that I'm using foreach, DoSNOW, and a SNOW socket cluster to solve for. How should I go about profiling the code to make sure I'm not doing something grossly inefficient. Also is there anyway to measure the data flows going between the master and nodes in a Snow cluster? Thanks, James ...
Is aov appropriate for unbalanced datasets. According to help ...provides a wrapper to lm for fitting linear models to balanced or unbalanced experimental designs. But later on it says aov is designed for balanced designs, and the results can be hard to interpret without balance. How should I perform a 2-way anova on an unbalanced datas...
Hi, I have a list (tmpList), which looks like this: $op [1] "empty" $termset $termset$field [1] "entry" $termset[[2]] $termset[[2]]$explode [1] "Y" This is a list with a list inside. If I add this list to a vector theOneVector = c(theOneVector, tmpList) Now the resulting vector is of the length 2, because the first entry ("op") ...
df <- data.frame(age=c(10,10,20,20,25,25,25),veg=c(0,1,0,1,1,0,1)) g=ggplot(data=df,aes(x=age,y=veg)) g=g+stat_summary(fun.y=mean,geom="point") Points reflect mean of veg at each age, which is what I expected and want to preserve after changing axis limits with the command below. g=g+ylim(0.2,1) Changing axis limits with the above c...
I'm trying to collapse a data frame by removing all but one row from each group of rows with identical values in a particular column. In other words, the first row from each group. For example, I'd like to convert this > d = data.frame(x=c(1,1,2,4),y=c(10,11,12,13),z=c(20,19,18,17)) > d x y z 1 1 10 20 2 1 11 19 3 2 12 18 4 4 13 17...
> D <- read.csv("sample1.csv", header = FALSE, sep = ",") > D V1 V2 V3 V4 1 20100316 109825 352120 239065 2 20100317 108625 352020 239000 3 20100318 109125 352324 241065 > D[,1] [1] 20100316 20100317 20100318 In the above example how do I get the data in D[,1] to be read, and stored as date values: 2010-03-16, 201...
Hi all, I just finished reading about scoping in the R intro, and am very curious about the <<- assignment. The manual showed one (very interesting) example for "<<-", which I feel I understood. What I am still missing is the context of when this can be useful. So what I would love to read from you are examples (or links to examples) ...
I want to import the contents of a csv file into R, the csv file contains multiple sections of data vertically, seperated by blank lines and asterisks. For example ******************************************************** * SAMPLE DATA ****************************************** ******************************************************** Na...
hi every body i want to write programme in R to draw some charts in the same plot, so if any body can help me i well be regardes to them ...