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BackToBackBarplot
A back to back barplot from scratch This example is shown in Figure 3.30 in Paul Murrell's R Graphics book. Also, be aware of the Hmisc package's histbackback() function ...
r2 - 14 Nov 2006 - 07:59 by TheresaScott
BaseballDataManip
Cole Beck's Baseball data set problem The goal of this problem was to 'reshape' the original data set (bos_pit.csv) to the desired data set. * bos_pit.csv The following ...
r2 - 27 Nov 2006 - 13:25 by TheresaScott
BlockRandomizationWithRandomBlockSizes
Block Randomization with Random Block Sizes The following code illustrates how to generate the randomization treatment assignments for a randomized clinical trial ...
r4 - 07 Mar 2008 - 12:32 by FrankHarrell
BrokenAxisExample
Adding a 'broken axis' to a plot We've all seen a plot with a 'broken axis' e.g., the axis goes from 0 to 9 in units of 1, then shows a 'break' (//) and then continues ...
r2 - 14 Nov 2006 - 10:27 by TheresaScott
CategorizingContinuousCovariates
A plot that illustrates the effect of categorizing continuous covariates in a logistic regression model The idea behind this problem is the fact that fitting a categorized ...
r2 - 15 Nov 2006 - 10:58 by TheresaScott
CharlesDupontMiscList
Charles Dupont Misc List * wrote twiki session cleanup plugin * created means to automaticaly protect resticed files in twiki pub dir * modified backup script ...
NEW - 15 Jun 2005 - 09:02 by CharlesDupont
ClinPharmSyllabus
Biostatistics for Clinical Pharmacology Fellows Instructors: Chris Slaughter and Frank Harrell Course page: http://biostat.mc.vanderbilt.edu/ClinStat Course Goals ...
r4 - 19 Aug 2009 - 12:01 by ChrisSlaughter
ClinicAnalyses
Clinical and Health Research Clinic Click here for 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015, 2014, and before. Current Notes (2023) 2023 December 7 Tara ...
r1030 - 07 Dec 2023 - 13:14 by CassieJohnson
Clinics
Biostatistics Clinics All Biostatistics clinics will be held via teleconference (Microsoft Teams) and walk in attendance is no longer permitted. Monday Friday Noon ...
r165 - 29 Mar 2024 - 13:17 by RobertGreevy
ColorsFn
A function that displays the colors you can specify using the colors() function R has 657 built in colors that can be accessed using the colors() function. Invoking ...
r2 - 10 Nov 2006 - 10:19 by TheresaScott
ComplexTable
Generating a complex table of drug, disease, and phase Synopsis of Problem: * Trying to create a table which lists the drugs and diseases for a given phase or combination ...
r8 - 15 Nov 2006 - 11:32 by TheresaScott
CourseBios312Objectives
Course Goals * Learn how to use modern regression methods to answer scientific questions * Become familiar with statistical concepts including exploratory data ...
r6 - 02 Jan 2013 - 11:17 by ChrisSlaughter
DMEx1
Rafe's problem d = data.frame(doc = c(1,2,3,2,2,3,4,6,5,5), prepost= c(0,0,1,1,1,0,0,1,0,1)) d =d order(d$doc), uu = function(u){ u = unique(u) if (length ...
r2 - 21 Nov 2006 - 08:44 by TheresaScott
DMEx2
Jonathan's problem jon = junk2$mint, 1, 0))
r2 - 21 Nov 2006 - 08:47 by TheresaScott
DMEx3
Preparing data for survival analysis Our original data file, temp.csv, has repeated glucose values for each subject (DeID) at various times points (Time) from both ...
r2 - 21 Nov 2006 - 08:50 by TheresaScott
DMEx4
Rafe's Dataset Reshape Problem Rafe posed the following problem. The original data set had three measurements for each 'specimen' (spec). The goal was was to turn ...
NEW - 15 Mar 2007 - 12:19 by FrankHarrell
DatadensityFunction
The generic datadensity() function The datadensity() function is a generic functions used to show data densities in more complex situations. There are two class specific ...
r2 - 14 Nov 2006 - 08:35 by TheresaScott
DesignSurvivalAnalysis
Survival analysis with the survival and Design packages The following are some examples of how to perform survival analysis using the survival and Design packages ...
r2 - 10 Nov 2006 - 08:16 by TheresaScott
DesiredOutputFn
A function that returns the desired output from another function Often, you do not want to return all of the default output from a specific function. The following ...
r2 - 10 Nov 2006 - 10:39 by TheresaScott
DrawingOutsidePlot
Drawing outside of the plotting region In R, traditional graphical output is usually 'clipped' to the plotting region. In other words, any output that would appear ...
r2 - 13 Nov 2006 - 16:16 by TheresaScott
EmacsEss
Emacs and ESS EmacsSpeaksStatistics more Emacs is an incredibly powerful text editor. It can be programmed to do anything. It was written before the advent of ...
r19 - 22 Jul 2013 - 09:06 by FrankHarrell
ForLoopRegression
Generating multiple regression models in a for loop Often, we wish to generate multiple regression models that are all similar, but all different. For example, all ...
NEW - 16 Feb 2007 - 10:16 by TheresaScott
HmiscSummaryFormulaFunction
Using the Hmisc package's summary.formula() function This following is an illustration of the many uses of the Hmisc package's summary.formula() function. The sample ...
r2 - 15 Nov 2006 - 11:46 by TheresaScott
HowToPagesList
How To Pages on the Biostatistics Wiki We are quickly building a lot of useful how to pages on our site. This page should help you find the pages you need quickly ...
r46 - 06 Feb 2024 - 14:08 by DalePlummer
IntroBiostatCourse2006
IGP 304: Statistics for Biomedical Research Instructor: Chun Li, Ph.D. (chun.li #64;vanderbilt.edu; 515D Light Hall; 322 2884) Assistant: David Reif (david ...
r69 - 30 Oct 2006 - 12:16 by ChunLi
IntroBiostatCourse2007
IGP 304: Statistics for Biomedical Research (Spring 2007) Instructors: Chun Li, Ph.D. (chun.li #64;vanderbilt.edu; 515D Light Hall; 322 2884) Leena Choi, Ph.D. (leena ...
r56 - 24 Jun 2009 - 08:58 by LeenaChoi
LayoutFnExample
Using the layout() function to generate multiple plots The par() function's mfrow= argument is often used to generate multiple plots on one page. However, as you ...
r2 - 14 Nov 2006 - 09:32 by TheresaScott
MemoryEfficientGeneration
Generating data structures in a memory efficient manner We often generate data structures, such as vectors or data frames, in for loops or in our own used defined ...
NEW - 21 Nov 2006 - 09:59 by TheresaScott
MondayClinicNotes2020
Recommendations, Analyses, and Data for Health Services Research, Diagnosis, and Prognosis Clinic Notes 2020 2020 12 14 Santiago Angaramo (Dolly Padovani Claudio ...
r3 - 18 Dec 2023 - 18:25 by IneSohn
MondayClinicNotes2021
Recommendations, Analyses, and Data for Health Services Research, Diagnosis, and Prognosis Clinic Notes 2021 2021 November 29 Megan Lancaster (Dan Roden), Cardiology ...
r2 - 18 Dec 2023 - 18:25 by IneSohn
MultiSortFunction
# this first multisort was the original way I wrote it # it could have a maximum of four columns to sort # multisort2) { extraArgs5) { #append ...
r2 - 17 Jan 2007 - 15:32 by ColeBeck
MultipleKMCurves
Plot the Kaplan Meier (K M) curves from two different K M calculations on the same plot The motivating data set for this example is the Rtestdata.sav SPSS data set ...
r2 - 14 Nov 2006 - 12:09 by TheresaScott
NumericFactorLevels
Coding factors with numerical levels instead of character ones Problem: Often times, the categorical variables in our read in data set have character denoted levels ...
r2 - 15 Nov 2006 - 10:42 by TheresaScott
OddDateManipulation
Converting dates of the form 'mddyy', 'mddyyyy', 'mmddyy', or 'mmddyyyy' to the form 'YYYY MM DD' Problem: A data file contains multiple date columns, whose format ...
r2 - 15 Nov 2006 - 10:36 by TheresaScott
PlottingModelResults
Plotting linear model results Often times, you would like to generate graphics based on a model you fit in R. These plots may include a number of diagnostic plots ...
r5 - 14 Nov 2006 - 13:28 by TheresaScott
RClinicHelpfulRCode4
How to write your own functions and good R programing techniques Good R Programing Techniques R is quite different from regular programing languages in the way that ...
r7 - 13 Mar 2008 - 11:57 by WillGray
RGraphicsDotplot
Making Dot Charts in R Rachel Hayes brought a problem to R Clinic on 23Oct08. The Hmisc Dotplot function can produce multi panel dot charts with error bars while ...
r2 - 27 Oct 2008 - 11:09 by WillGray
RGraphicsplsmo
Using the Hmisc plsmo Function for Plotting Nonparametric loess Trend lines R Clinic 23Oct08 The following examples use a new Titanic passenger and group survival ...
NEW - 26 Oct 2008 - 10:37 by FrankHarrell
RProgramming
R Programming ProgrammingTipsForStatisticians Google's R style guide Handouts and Online Books * S Poetry and R Inferno by Patrick Burns by Patrick J. Burns ...
r4 - 13 Feb 2014 - 16:08 by JoAnnAlvarez
RS
R Packages, Functions, and Documentation * R home R reference card R Programming Help files with output R Tutorials Videos R site search R seek ...
r58 - 14 Aug 2015 - 15:05 by JoAnnAlvarez
RichardUrbanoDateProblem
Converting dates of the form 'mddyy' or 'mddyyyy' or 'mmddyy' or 'mmddyyyy' to the form 'YYYY MM DD' Theresa A Scott, M.S. Biostatistician II, Department of Biostatistics ...
r4 - 12 Apr 2005 - 12:48 by TheresaScott
Seminars
#table1 {font family:"Trebuchet MS", Arial, Helvetica, sans serif; width:100%; border collapse:collapse;} #table1 td, #table1 th{ text align:center; width:16.6666 ...
r659 - 04 Oct 2023 - 13:51 by DalePlummer
SpecificCovariateORsFromDifferentLRMs
Plot the odds ratios (ORs) for a specific covariate from different logistic regression models Perhaps you are interested in the effect of a specific covariate from ...
r2 - 14 Nov 2006 - 12:42 by TheresaScott
StatBiomedResSyllabus
IGP 304: Statistics for Biomedical Research Instructor: Frank Harrell Course page: http://biostat.mc.vanderbilt.edu/StatBiomedRes Course Goals 1 understand ...
r13 - 10 Jan 2019 - 07:44 by FrankHarrell
StripchartColorExample
Distinguishing a second categorical variable by color in a stripchart across groups For this example, I generated a dummy data set containing repeated measures I ...
r2 - 14 Nov 2006 - 10:51 by TheresaScott
StripchartOverlaidWithBoxplot
An alternative to 'dynamite plots' (i.e., a bar depicting the mean, with a line depicting the standard deviation or error) We've all seen various examples of 'dynamite ...
r4 - 19 Dec 2007 - 15:54 by TatsukiKoyama
SumRepeatedMeasures
Finding the sum of repeated continuous variables for each subject Suppose you have a data set with repeated measures i.e., you have multiple values of a continuous ...
r2 - 21 Nov 2006 - 08:31 by TheresaScott
SurvivalAnalysisInR
1 Survival Analysis with Design Package. The author of the example code is TheresaScott * /Main/RClinic/survival.R
r3 - 08 Nov 2006 - 08:09 by TheresaScott
SweaveLatex
Sweave knitr and LaTeX Introduction and Helpful Templates: The following will help you start to learn and use knitr Sweave and LaTeX: * rlatex GitHub project: ...
r32 - 01 Nov 2015 - 10:50 by FrankHarrell
TheresaScott
Theresa Scott's Teaching Material An Introduction to the Fundamentals Functionality of the R Programming Language * Scott.IntroToR.I.pdf: Part I: An Overview ...
r139 - 06 Feb 2024 - 14:20 by DalePlummer
ThirdContrast
Incorporate the third contrast of a three level categorical predictor into the odds ratio summary plot of a logistic regression model In any regression model, by default ...
NEW - 09 Feb 2007 - 10:22 by TheresaScott
ThursdayClinicNotes2018
Data and Analysis for Clinical and Health Research Clinic Notes (2018) 2018 December 20 Stephen Halliday, Allergy, Pulmonary, Critical Care Medicine * We have ...
r2 - 18 Dec 2023 - 18:29 by IneSohn
ThursdayClinicNotes2023
Clinical and Health Research Clinic Notes (2023) 2023 December 7 Tara Helmer, VICTR We are working with a PI who wants to use My Health at Vanderbilt to recruit ...
NEW - 18 Dec 2023 - 18:50 by IneSohn
TwikiWorkShop
Outline for Linux Workshop January 26, 2005 January 25, 2006 January 30, 2008 Note that the 2007 version of this workshop can be found at MoreTwikiWorkShop. ...
r18 - 11 Dec 2009 - 09:51 by DalePlummer
VisitCountVariable
Generating a variable that correctly labels each subject's records as their first, second, etc. visit according to a visit date The idea behind this problem is that ...
r2 - 15 Nov 2006 - 11:19 by TheresaScott
WebHome
The Department * Goals and Vision * Frequently Asked Questions (FAQ) * Our People * Faculty/Staff by Specialty/Track * Careers * Books * Contact ...
r207 - 06 Feb 2024 - 14:21 by DalePlummer
WritingVectorList
Writing a list of vectors to a file Suppose you have a list whose components are vectors of different length, such as: a Here's how you can write the list to a file ...
NEW - 21 Nov 2006 - 10:11 by TheresaScott
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