agg                     Aggregate an Atomic Vector by Group
agg_dfm                 Data Information by Group
aggs                    Aggregate Data by Group
ave_dfm                 Repeated Group Statistics for a Data-Frame
by2                     Apply a Function to Data by Group
center                  Centering and/or Standardizing a Numeric Vector
center_by               Centering and/or Standardizing a Numeric Vector
                        by Group
centers                 Centering and/or Standardizing Numeric Data
centers_by              Centering and/or Standardizing Numeric Data by
                        Group
change                  Change Score from a Numeric Vector
change_by               Change Scores from a Numeric Vector by Group
changes                 Change Scores from Numeric Data
changes_by              Change Scores from Numeric Data by Group
colMeans_if             Column Means Conditional on Frequency of
                        Observed Values
colNA                   Frequency of Missing Values by Column
colSums_if              Column Sums Conditional on Frequency of
                        Observed Values
decompose               Decompose a Numeric Vector by Group
decomposes              Decompose Numeric Data by Group
dum2nom                 Dummy Variables to a Nominal Variable
freq                    Univariate Frequency Table
freq_by                 Univariate Frequency Table By Group
freqs                   Multiple Univariate Frequency Tables
freqs_by                Multiple Univariate Frequency Tables
long2wide               Reshape Multiple Scores From Long to Wide
make.dumNA              Make Dummy Columns For Missing Data.
make.dummy              Make Dummy Columns
make.fun_if             Make a Function Conditional on Frequency of
                        Observed Values
make.product            Make Product Terms (e.g., interactions)
mean_if                 Mean Conditional on Minimum Frequency of
                        Observed Values
mode2                   Statistical Mode of a Numeric Vector
ncases                  Number of Cases in Data
nom2dum                 Nominal Variable to Dummy Variables
partial.cases           Find Partial Cases
pomp                    Recode a Numeric Vector to Percentage of
                        Maximum Possible (POMP) Units
pomps                   Recode Numeric Data to Percentage of Maximum
                        Possible (POMP) Units
quest                   Pre-processing Questionnaire Data
recode2other            Recode Unique Values in a Character Vector to
                        0ther (or NA)
recodes                 Recode Data
renames                 Rename Data Columns from a Codebook
reorders                Reorder Levels of Factor Data
revalid                 Recode Invalid Values from a Vector
revalids                Recode Invalid Values from Data
reverse                 Reverse Code a Numeric Vector
reverses                Reverse Code Numeric Data
rowMeans_if             Row Means Conditional on Frequency of Observed
                        Values
rowNA                   Frequency of Missing Values by Row
rowSums_if              Row Sums Conditional on Frequency of Observed
                        Values
rowsNA                  Frequency of Multiple Sets of Missing Values by
                        Row
score                   Observed Unweighted Scoring of a Set of
                        Variables/Items
scores                  Observed Unweighted Scoring of Multiple Sets of
                        Variables/Items
shift                   Shift a Vector (i.e., lag/lead)
shift_by                Shift a Vector (i.e., lag/lead) by Group
shifts                  Shift Data (i.e., lag/lead)
shifts_by               Shift Data (i.e., lag/lead) by Group
sum_if                  Sum Conditional on Minimum Frequency of
                        Observed Values
tapply2                 Apply a Function to a (Atomic) Vector by Group
valid_test              Test for Invalid Elements in a Vector
valids_test             Test for Invalid Elements in Data
vecNA                   Frequency of Missing Values in a Vector
wide2long               Reshape Multiple Sets of Variables From Wide to
                        Long
winsor                  Winsorize a Numeric Vector
winsors                 Winsorize Numeric Data
