Learn R Programming

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lessR (version 2.2)

Less Code, More Results

Description

Each function accomplishes the work of several or more standard R functions. For example, two function calls, rad() and full(), together read the csv data and generate descriptive statistics for all variables in the data frame, plus histograms and bar charts as appropriate. The t-test function, tt, analyzes one or two groups from data or summary statistics and introduces the ODDSMD plot, which displays the Overlapping Density Distributions of two independent groups as well as a visual display of the mean difference and standardized mean difference. Other functions provide for descriptive statistics, a comprehensive regression analysis, color plotting, color bar chart, color histogram, color box plot, color density curves, a calibrated power curve, and the reading and display of csv formatted data. The function help.me provides a help system that suggests specific analyses and functions. Variable labels are also available.

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Version

Install

install.packages('lessR')

Monthly Downloads

4,097

Version

2.2

License

GPL (>= 2)

Maintainer

David W Gerbing

Last Published

March 28th, 2012

Functions in lessR (2.2)

label

Get a Variable Label for Display on Output
sim.CLT

Pedagogical Simulation for the Central Limit Theorem
help.me

Help System for Statistics by Topic that Suggests Related Functions
hst

Histogram with Color
dat.employee

Employee Data
dens

Data Based Density Curves with Color and Histogram
full

Full Descriptive Analysis of all Variables in the Data Frame
sim.CImean

Pedagogical Simulation for the Confidence Interval of the Mean
sim.flips

Pedagogical Binomail Simulation, Coin flips
prob.norm

Compute and Plot Normal Curve Probabilities over an Interval
ptt

Compute a Power Curve for a One or Two Group t-test
pc

Pie Chart
out

Write the Contents of Data Frame mydata to a csv File
prob.t

Plot t-distribution Curve and Corresponding Normal Curve with Tail Cutoffs
prob.znorm

Plot a Normal Curve with Shaded Intervals by Standard Deviation
dat.twogroup

ShipTimes of Two Suppliers
color.show

Display Named R Colors and rgb Values
rad

Read, Attach and Display Contents of a Data File
bc

Bar Chart of One or Two Variables with Color
reg

Regression Analysis
values

List the values of a Variable
plt

Color Scatter Plot, Function Plot, or Run Chart with Optional Dates
sim.means

Pedagogical Simulation of Sample Means over Repeated Samples
dots

Dot or Strip Chart
ss

Summary Statistics with an Option for Each Level of Another Variable
bx

Color Boxplot
tt

Generic Method for t-test and Standardized Mean Difference with Enhanced Graphics