@BeginModule
@NewPage
@Name      = Vertstat
@Title     = Vertical statistical values
@Section   = Statistical values
@Class     = Statistic
@Arguments = ifile ofile
@Operators = vertmin vertmax vertsum vertmean vertavg vertstd

@BeginDescription
This module computes statistical values over all levels of the input variables.
According to actual operator the vertical minimum, maximum, sum, average, 
standard deviation or variance is written to @file{ofile}.
@EndDescription
@EndModule


@BeginOperator_vertmin
@Title     = Vertical minimum

@BeginDescription
For every gridpoint the minimum over all levels is computed.
@EndDescription
@EndOperator


@BeginOperator_vertmax
@Title     = Vertical maximum

@BeginDescription
For every gridpoint the maximum over all levels is computed.
@EndDescription
@EndOperator


@BeginOperator_vertsum
@Title     = Vertical sum

@BeginDescription
For every gridpoint the sum over all levels is computed.
@EndDescription
@EndOperator


@BeginOperator_vertmean
@Title     = Vertical mean

@BeginDescription
For every gridpoint the mean over all levels is computed.
@EndDescription
@EndOperator


@BeginOperator_vertavg
@Title     = Vertical average

@BeginDescription
For every gridpoint the average over all levels is computed.
@EndDescription
@EndOperator


@BeginOperator_vertstd
@Title     = Vertical standard deviation

@BeginDescription
For every gridpoint the standard deviation over all levels is computed.
@EndDescription
@EndOperator


@BeginExample
To compute the vertical sum of all input variables, use:
@BeginVerbatim
   cdo vertsum ifile ofile
@EndVerbatim
@EndExample
