G01AUF combines sets of summaries produced by
G01ATF.
Assume a dataset containing
observations, denoted by
and a set of weights,
, has been split into
blocks, and each block summarised via a call to
G01ATF. Then G01AUF takes the
communication arrays returned by
G01ATF and returns the mean (
), standard deviation (
), coefficients of skewness (
) and kurtosis (
), and the maximum and minimum values for the whole dataset.
If on entry
or
, explanatory error messages are output on the current error message unit (as defined by
X04AAF).
Not applicable.
The order that the
communication arrays are stored in
MRCOMM is arbitrary. Different orders can lead to slightly different results due to numerical accuracy of floating point calculations.
Both G01AUF and
G01ATF consolidate results from multiple summaries. Whereas the former can only be used to combine summaries calculated sequentially, the latter combines summaries calculated in an arbitrary order allowing, for example, summaries calculated on different processing units to be combined.
This example summarises some simulated data. The data is supplied in three blocks, the first consisting of observations, the second observations and the last observations. Summaries are produced for each block of data separately and then an overall summary is produced.