Check a matrix for positive definitness
Create a data frame suitable for estimating a model
rockchalk: regression functions
Generic function for plotting regressions and interaction effects
Religious beliefs and crime rates
Tabulates observed values and calculates entropy
Returns center values of x, the mean, mean-std.dev, mean+std.dev
Converts the R-square to the variance inflation factor
Sorts numeric from factor variables and returns separate
summaries for those types of variables.
Convert the vech (column of strictly lower trianglar values from a matrix) into a correlation matrix.
Calculates a "residual-centered" interaction regression.
retrieves estimates of the coefficient of determination from a list of regressions
Estimate standardized regression coefficients for all variables
Extract presentation from a pctable object
print method for summary.pctable objects
Convert a half-vector (vech) into a matrix.
Create a uniquely named directory. Appends number & optionally date to directory
name.
Calculates partial correlation coefficients after retrieving data matrix froma fitted regression model
Illustrate multicollinearity in regression, part 1.
Creates a cross tabulation with counts and percentages
Extracts non-numeric variables, calculates summary information,
including entropy as a diversity indicator.
Generates a data frame for regression analysis
magRange
Magnify the range of a variable.
Plot testSlopes objects
Select focal values from an observed variable.
meanCenter
Multi-collinearity diagnostics
Superimpose regression lines on a plotted plane
Create a focal value vector.
Minor revision of mvrnorm (from MASS) to facilitate replication
Calculate a predicted value matrix (fit, lwr, upr) for a
regression, either lm or glm, on either link or response scale.
perspEmpty
Assists creation of predicted value curves for regression models.
Select most frequently occurring values from numeric or categorical variables.
Central Tendency estimates for variables
formatter for merMod objects copied from lme4
Create a "raw" (UNTRANSFORMED) data frame equivalent to the input
data that would be required to fit the given model.
Regression plots with predicted value lines, confidence intervals, color coded interactions
Calculate excess kurtosis
Create a newdata frame for usage in predict methods
Create Symmetric Matrices, possibly covariance or correlation matrices, or check a matrix for symmetry and serviceability.
Pad with 0's.
Create sequences for plotting
Estimate leave-one-variable-out regressions
Creates a publication quality result table for regression models.
outreg0 is the last version in the last development stream.
Cheating and Looting in Japanese Electoral Politics
Create correlation matrices.
makeVec for checking or creating vectors
A way of checking if a string is a valid file name.
Create covariance matrix from correlation and standard deviation
information
Extracts numeric variables and presents an alphabetized summary in
a workable format.
Hypothesis tests for Simple Slopes Objects
Calculates the delta R-squares, also known as squared
semi-partial correlation coefficients.
Calculate skewness
Find numeric columns, center them, re-name them, and join them with the original data.
Generates a data frame for regression analysis.
Draw a 3-D regression plot for two predictors from any linear or nonlinear lm or glm object
Convert LaTeX output from outreg to HTML markup
recode a factor by "combining" levels
Creates a publication quality result table for
regression models. Works with models fitted with lm, glm, as well
as lme4.
Calculates the "center" quantiles, always including the median, when n is odd.
Create predicted values after choosing values of predictors. Can
demonstrate marginal effects of the predictor variables.
Display pctable objects
Prints out the contents of an object created by summarizeFactors
in the style of base::summary