similar to: Reading one column .csv file

Hi, Typical things you read when new to stats are cautions about using a t-statistic when comparing independent samples. You are steered toward a pooled test or welch's approximation of the degrees of freedom in order to make the distribution a t-distribution. However, most texts give no information why you have to do this. So I thought I try a little experiment which is outlined here.

Hi, I am encountering a difficulty I don't understand. Be patient, I'm very new to analysis of variance. If I load this data: example12_7=read.table("http://msemac.redwoods.edu/~darnold/math15/data/chapter12/example12_7.dat",header=TRUE) The run the oneway.test: oneway.test(time~drug,data=example12_7,var.equal=TRUE) I get these results: data: time and drug F = 4.1881, num

Hi, We were wondering how we could make a stacked frequency diagram such as this one: http://msemac.redwoods.edu/~darnold/math15/liz.pdf We don't necessarily need the shaded "balls", other characters would be fine, such as stacks of x's. David

Hi, I'm looking for some ideas on how to reproduce the attached image in R. There are three samples, each of size n = 10. The first is drawn from a normal distribution with mean 60 and standard deviation 3. The second is drawn from a normal distribution with mean 65 and standard deviation 3. The third is drawn from a normal distribution with mean 70 and standard deviation 3.

Hi, Reading about a "Heads and Tails" game in http://www.dartmouth.edu/~chance/teaching_aids/books_articles/probability_book/amsbook.mac.pdf Introduction to Probability (Example 1.4, pp. 5-8). You toss a coin 40 times. If heads, Peter wins $1, tails, he loses $1. I think I can do that ok with: winnings <- sum(sample(c(-1,1), 40, replace=TRUE)) But I have to do it 10,000 times

Hi, I hope that folks can give me some simple approaches to taking the data set below, which is accumulated in two columns called "long" and "group", then arrange the data is the "long" column into a data frame containing five variables: "Group 1", "Group 2", "Group 3", "Group 4", and "Group 5". I am hoping for a few

All, Consider: BagA <- c(-1000,10,10,10,10,10,10, 10,20,20,20,20,20,20,30, 30,40,40,50,60) BagB <- c(10,20,30,30,40,40,50,50, 50,50,50,50,60,60,60,60, 60,60,60,1000) layout(c(2,1)) barplot(table(BagB)) barplot(table(BagA)) At this point, I'd like to arrange the plots so that the 10-bars are aligned, the 20-bars are aligned, etc. So, I started

Hi, Can someone explain this: > options(digits=20) > 1/3 [1] 0.33333333333333331483 Why the 1483 at the end? Thanks, David. david-arnolds-macbook-pro-2:~ darnold$ R --version R version 2.15.2 (2012-10-26) -- "Trick or Treat" Copyright (C) 2012 The R Foundation for Statistical Computing ISBN 3-900051-07-0 Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit) -- View this

Hello, I'm trying to plot an exponential regression line through my data (scatterplot with trend line), but can't find a way to do that. it is to be the best fit possible. -- View this message in context: http://www.nabble.com/plotting-regression-line-tp17837683p17837683.html Sent from the R help mailing list archive at Nabble.com.

All, I am looking at an example in Aliaga's Interactive Statistics. Bag A has the following vouchers. BagA <- c(-1000,10,10,10,10,10,10, 10,20,20,20,20,20,20,30, 30,40,40,50,60) Bag B has the following vouchers. BagB <- c(10,20,30,30,40,40,50,50, 50,50,50,50,60,60,60,60, 60,60,60,1000) Two values are selected (from BagA or BagB) without

All, Is this typical of how people will print a summary of results? CoinTosses <- function(n) { x <- sample(c(0,1), n, replace=TRUE) y <- x y[y==0] <- "T" y[y==1] <- "H" numHeads <- sum(x) numTails <- n-sum(x) p <- numHeads/n cat(cat(y,sep=""),"\n") cat("Number of heads: ", numHeads, "\n")

All, I believe I am running the latest version of rshape2 (1.2.1). But this code: library(reshape2) tmp <- melt(smiths, id.vars=1:2, measure.vars=c("age","weight","height"), variable.name="myvars", value.name="myvals" ) names(tmp) Produces this output: > names(tmp) [1] "subject" "time"

Hi! Is it possible to easily cut & paste data from an Excel spreadsheet to an R edit( ) grid or to variable? It seems that R cannot handle the cell delimiters Excel hands over. Regards, Werner

I've now tested with: > R.version.string [1] "R Under development (unstable) (2024-02-16 r85931)" and all of the previously mentioned examples now work as expected on macOS. Thanks for the quick fix, Jenny On Thu, Feb 15, 2024 at 8:02?AM Tomas Kalibera <tomas.kalibera at gmail.com> wrote: > > On 2/14/24 23:43, Jennifer Bryan wrote: > > Hello, > > >

Hi, Entering data from a given file is the hardest part of learning R for me. For example, I have this datafile from Moore's text: Live Age Count Parents Age19 324 Another Age19 37 OwnPlace Age19 116 Group Age19 58 Other Age19 5 Parents Age20 378 Another Age20 47 OwnPlace Age20 279 Group Age20 60 Other Age20 2 Parents Age21 337 Another Age21 40 OwnPlace Age21 372 Group Age21 49 Other Age21 3

Hi, I managed to use the attached data set and figure out the following: flies <- read.table("example12_1.dat",header=TRUE,sep="\t") boxplot(long ~ group, data = flies, horizontal = TRUE, col = "red") I'm very new to R and would like some help with the following: 1. Change the order on the y-axis from 1, 2, 3, 4, 5 to 5, 4, 3, 2, 1.

Hello, I've noticed a specific type of pipe() usage that works in released R, but not in r-devel. In 4.3.2 on macOS, I can write to a connection returned by pipe(), i.e. "hello, world" prints here: > R.version.string [1] "R version 4.3.2 (2023-10-31)" > con <- pipe("cat") > writeLines("hello, world", con) hello, world But in r-devel on

Hi I'm a mac user. I have problems loading data from mac excel in R. I'm using these script: >library(utils) >data2 <- read.table(file("clipboard"), header =T, sep ="\t") ____but this is the message that I have from R_____ Error in open.connection(file, "r") : cannot open the connection In addition: Warning message: In open.connection(file,

All, 1. Is there a command that tells you what libraries are loaded? 2. How do you remove a library that has been loaded? 3. If you have loaded a library that masks previously loaded objects, how can you tell which object is being run? In Matlab, I would run "which f" to determine the location of the file f that will be run. Is there a similar procedure in R? David. -- View this

All, Can someone explain why this does not print the contents of x when I source this file? CoinTosses <- function(n,print=TRUE) { x <- sample(c(0,1), n, replace=TRUE) y <- x y[y==0] <- "T" y[y==1] <- "H" p <- sum(x)/n p } x <- CoinTosses(40) x On the other hand, if I source this file: CoinTosses <- function(n,print=TRUE) { x <-