R: Tools to Deal with Interval-Valued Responses in Questionnaires

# Tools to Deal with Interval-Valued Responses in Questionnaires

## Documentation for package ‘IntervalQuestionStat’ version 0.2.0

- DESCRIPTION file
- Package NEWS
- Package README

## Help Pages

IntervalQuestionStat-package | Tools to Deal with Interval-Valued Responses in Questionnaires
*-method | Interval arithmetic operations
+-method | Interval arithmetic operations
--method | Interval arithmetic operations
apply | Apply functions over 'IntervalMatrix' margins
apply-method | Apply functions over 'IntervalMatrix' margins
arithmetic | Interval arithmetic operations
as.IntervalData | Convert a real number into a degenerate interval
as.IntervalData-method | Convert a real number into a degenerate interval
as.IntervalList | Convert a single interval to a list of intervals
as.IntervalList-method | Convert a single interval to a list of intervals
c | Combine 'IntervalData' and 'IntervalList' objects
c-method | Combine 'IntervalData' and 'IntervalList' objects
cbind | Combine 'IntervalList' and 'IntervalMatrix' objects by columns
cbind-method | Combine 'IntervalList' and 'IntervalMatrix' objects by columns
cov | Calculate the sample covariance between two random intervals
cov-method | Calculate the sample covariance between two random intervals
cronbach | Estimate sample Cronbach's alpha coefficient
dim | Get the number of rows and columns of an 'IntervalMatrix' object
dim-method | Get the number of rows and columns of an 'IntervalMatrix' object
distance | Calculate the theta-distance between two intervals
distance-method | Calculate the theta-distance between two intervals
extract | Extract and replace parts of an interval-valued object
IntervalData | Create an 'IntervalData' object
IntervalData-class | S4 class representing a single interval
IntervalDataOrIntervalList-class | Virtual union of 'IntervalData' and 'IntervalList' classes
IntervalList | Create an 'IntervalList' object
IntervalList-class | S4 class representing a list of intervals
IntervalListOrIntervalMatrix-class | Virtual union of 'IntervalList' and 'IntervalMatrix' classes
IntervalMatrix | Create an 'IntervalMatrix' object
IntervalMatrix-class | S4 class representing a matrix of intervals
ivs2likert | Convert interval-valued responses into their equivalent numerically encoded Likert-type scale answers with minimum theta-distance criterion
ivs2likert-method | Convert interval-valued responses into their equivalent numerically encoded Likert-type scale answers with minimum theta-distance criterion
ivs2vas | Convert interval-valued responses into equivalent visual analogue scale answers through mid-point criterion
ivs2vas-method | Convert interval-valued responses into equivalent visual analogue scale answers through mid-point criterion
lackinfo | Lack of information in expository face-to-face lessons data set
length | Get the length of an 'IntervalList' object
length-method | Get the length of an 'IntervalList' object
mean | Calculate the sample Aumann mean of a random interval
mean-method | Calculate the sample Aumann mean of a random interval
mid | Extract and replace the mid-points of interval-valued objects
mid-method | Extract and replace the mid-points of interval-valued objects
mid<- | Extract and replace the mid-points of interval-valued objects
mid<--method | Extract and replace the mid-points of interval-valued objects
ncol | Get the number of columns of an 'IntervalMatrix' object
ncol-method | Get the number of columns of an 'IntervalMatrix' object
nrow | Get the number of rows of an 'IntervalMatrix' object
nrow-method | Get the number of rows of an 'IntervalMatrix' object
plot | Plot a single interval or a list of intervals
plot-method | Plot a single interval or a list of intervals
rbind | Combine 'IntervalList' and 'IntervalMatrix' objects by rows
rbind-method | Combine 'IntervalList' and 'IntervalMatrix' objects by rows
show | Print basic information of interval-valued data
show-method | Print basic information of interval-valued data
simulIVS | Simulation of interval-valued responses to a questionnaire
spr | Extract and replace the spreads of interval-valued objects
spr-method | Extract and replace the spreads of interval-valued objects
spr<- | Extract and replace the spreads of interval-valued objects
spr<--method | Extract and replace the spreads of interval-valued objects
sum | Calculate the sum of n intervals
sum-method | Calculate the sum of n intervals
var | Calculate the sample Fréchet variance of a random interval
var-method | Calculate the sample Fréchet variance of a random interval
[-method | Extract and replace parts of an interval-valued object
[<--method | Extract and replace parts of an interval-valued object
[[-method | Extract and replace parts of an interval-valued object
[[<--method | Extract and replace parts of an interval-valued object