similar to: Ordering the levels of a vector

Displaying 20 results from an estimated 40000 matches similar to: "Ordering the levels of a vector"

2008 Apr 22
3
Using the 'by' function within a 'for' loop
Dear R experts, I am sorry for sending this email again. I would imagine yesterday and maybe today, have been very busy days with the release of R v 2.7.0. I join all the R users who are very gratful for your contant work and efforts, specially knowing that you are doing this for the sake of science, without gettig any compensation for that. Having written that, I decided to send the
2008 Feb 05
6
Sampling
Hi there, I want to generate different samples using the followindg code: g<-sample(LETTERS[1:2], 24, replace=T) How can I specify that I need 12 "A"s and 12 "B"s? Thank you, Judith ____________________________________________________________________________________ Be a better friend, newshound, and
2012 Feb 06
2
Reordering levels of a factor when the factor is part of a data frame
Hello R-users,    I have a data frame whose names of columns I don't know a priori, but the user of my code will know them. The user is supposed to save the name of the column that will need some reordering of the levels of the factor later on. The name of the column will be saved in an object called: variab the data frame is called df. If I try to the do following:
2007 Nov 14
1
Changing the text in the strips of lattice plots and y axis
Dear R-helpers, I am sorry for asking something I know has been asked before, I have tried different combinations in the strip function without success... I am using version 2.5.1 and work on a PC. I have barcharts generated from the following formula: barchart(y1+y2+y3~x | g) I need to change the names of the variables y1,y2 or y3 that currently appear in the strips, I have two
2008 Feb 26
2
Multiple lines with a different color assigned to each line (corrected code)
Sorry, I just realized I didn't type in the correct names of the variables I am working with, this is how it should be: plot(1,1,type="n") for (i in summ$tx) { points(summ$timep[summ$tx==i],summ$mn[summ$tx==i]) lines(summ$timep[summ$tx==i],summ$mn[summ$tx==i]) } Thank you, Judith ____________________________________________________________________________________
2007 May 22
4
Legend outside plotting area
Hi, I have been trying many of the suggested options to place a legend outside plotting area, including something like this: par(xpd=T, oma=par()$oma+c(4.5,0,1.5,0),mar=par()$mar+c(1,0,1,0) But the aspect of the four plots gets compromised when I change the margin settings. I cannot use mtext because I need to use colors for the text. I tried layout, but wouldn't let me include
2009 Apr 10
2
Stacked density plots
Hello R-community, I want to generate stacked density plots in lattice. My data consist of a numeric variable ('pid') that is measured in different individuals ('id'), which can be divided in two types ('type') and the measurements were repeated a different time points ('day'). I read in the Lattice book that this can be done using the 'flowViz'
2008 Apr 23
2
Replecing empty values with a letter (continuation)
Sorry, I hit the send botton by accident. Here is my code so far: dat<-read.csv('myfile.csv', na.strings="") dat[is.na(dat]<-'N' But it doesn't replace the <NA> for the letter 'N'. I am using R v 2/7/0, running it under Windows XP. Thank you, Judith
2009 Apr 02
1
Histogram with lattice with two 'conditional' variables
Hello dear R-community, I have been trying to figure out a way to generate histograms of a numeric variable observed in different entities ('individual' below). Each one of this entities is classified as "A" or "B" (according to the pseudo-code below): variable<-sample(rep(1:10,10)) individual<-rep(1:10, length(variable))
2008 Jan 22
1
Adding a table to a lattice plot
Hi, Is there an analog function of textplot in the lattice package? I need to add a data frame to a lattice plot. I work in a Windows environment and I am using R v 2.6.1 Thank you, Judith ____________________________________________________________________________________ Be a better friend, newshound, and
2007 Dec 10
2
Viewport and grid.draw
Hi Deepayan and everyone, I need to add a common legend to a group of latice graphs, I have tried different ways using viewport and grid.draw without success. Here is what I have: plot.new() library(grid) library('IDPmisc') print(plot1, split=c(1,1,2,4), more=TRUE) print(plot4, split=c(2,1,2,4), more=TRUE) print(plot2, split=c(1,2,2,4), more=TRUE) print(plot5, split=c(2,2,2,4),
2008 Feb 21
3
R console closes on its own
Dear R-experts, I am running a script that has the following structure: windows(height=5.5,width=8) dat<-read.csv("myfile.csv") names(dat)<-c('a','b','c','d') dat<-dat[,1:4] xyplot(dat$a~dat$b) Then I usually save the plot as a PDF (from the menu in the R console). I can save the PDF twice in a row; but at the third time, right when I
2007 Jun 13
2
Removing Inf and Inf values from a fata frame
Hi, I have a csv file with empty values, when I apply the different functions (mean, std, etc.) I create a new data frame, the empty values generate Inf and -Inf values. How can I remove those Inf and -Inf values from the new data frame? I already specified na.rm in the mean and std functions, but the values are still there. Thank you, Judith
2007 Jul 02
2
Substitution of Variables
Hi, I need to run a script under the variable (that comes from a csv file) that is assigned to another variable. This is very a simplified version of what I want to do: data<-read.csv('name.csv') names(data)<-("VA","VB","VC") v<-VA mn(v) Thank you in advance, Judith
2008 Feb 27
2
Add a rectangle behind a plot
Hi there, I found one reference to add a reactangle behind a plot using plot(...,add=T), I tried this but didn't obtain the desired result. If a I have the following code: plot(x,y) rect(xleft, ybottom, xright,ytop,col='green) The rectangle appear on top of the plot. Any help will be greatly appreciated, Judith
2009 Aug 25
3
Regular expression to define contents between parentheses
Hello dear R-helpers, I haven't been able to figure out of find a solution in the R-help archives about how to delete all the characters contained in groups of parenthesis. I have a vector that looks more or less like this: myvector<-c("something (80 km/h, sd) & more (6 kg/L,sd)", "somethingelse (48 m/s, sd) & moretoo (50g/L , sd)") I want to extract all
2007 Dec 09
1
Adding text outside lattice plot
Hello, I need to add some text in the upper left position, outside a lattice plot. xyplot(x~y) ltext(locator(1), label='My text') doesn't work. I would appreciate any help. Tahnk you, Judith ____________________________________________________________________________________ Be a better friend, newshound, and
2008 Feb 14
1
Replacing a character string when finding substring match
Dear R-experts, I need to replace the values of a vector(tx) with a word ('Vehicle') when the value of the vector contains the word 'vehicle'. Sometimes, the value could be 'MCT vehicle', or 'control-vehicle', etc. I tried gsub like this treatment<-gsub('vehicle','Vehicle', tx, ignore.case=T) But then I end up with values like 'MCT
2007 Dec 09
1
Saving lattice plot as a PDF
Hi there, I need to save a series of lattice plots as a PDF, this is my code so far: windows(height=8,width=6) plot.new() library('grid') lattice.options(layout.heights=list(top.padding=list(x=0.15, units="inches"))) print(plot1, split=c(1,1,2,3), more=TRUE) print(plot2, split=c(1,2,2,3), more=TRUE) print(plot3, split=c(1,3,2,3), more=TRUE) print(plot4, split=c(2,1,2,3),
2007 Nov 21
1
Manipulating x axis in stripchart
Hi all, I I need to manipulate the x axis in a stripchart. I will use one of the data sets included in R to explain what I need to do. attach(ToothGrowth) stripchart(len[supp=='VC']~dose[supp=='VC'], vertical=TRUE, group.names=c('A','A','A')) stripchart(len[supp=='OJ']~dose[supp=='OJ'], add=TRUE, vertical=TRUE, at=c(1:3)+.1,