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Summary functions

These functions calculate scalar summaries of values in any numerical structure:

    SUM Arithmetic sum
    TOTAL Synonym for SUM
    MEAN Average
    MEDIAN Median value
    MINIMUM Minimum value
    MAXIMUM Maximum value
    RANGE Range of values
    CORRELATION Correlation
    COVARIANCE Covariance
    SD Standard deviation
    SEMEAN Standard error of the mean
    SKEWNESS Skewness
    KURTOSIS Kurtosis
    VARIANCE Variance
    NVALUES Number of values
    NVUNRESTRICTED number of values ignoring restrictions (i.e. full length)
    NOBSERVATIONS Number of observations (non-missing values)
    NMV Number of missing values

These functions provide percentiles, quartiles and ranks of the values in any numerical structure:

    PERCENTILES Percentiles
    QUANTILES Quantiles
    RANKS Ranks

These functions provide summaries of running sequences of values in a variate:

    RMEANS Running means
    RNOBSERVATIONS Number of observations contributing to the computation of a running mean or total about each unit
    RTOTALS Running totals
    RUNS Length of run of identical values up to each unit

This function gives the number of levels in a factor:

    NLEVELS Number of levels of a factor

These functions evaluate areas:

    AREA Estimates the area under a curve
    PAREA Area of a polygon

These function indicate whether or not a dummy structure has been set:

    SET Returns 1 if a dummy is set, otherwise 0
    UNSET Returns 1 if a dummy is unset, otherwise 0
Updated on May 20, 2019

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