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Chapter 3. variables & expressions

Variable syntax

Pseudo-variables

Grids and axes of pseudo-variables

User-defined variables

Abstract variables

Missing value flags

Missing values in input files

Missing values in user-defined variables

Missingvalues in output NetCDF files

Displaying the missing value flag

Returning properties of variables

Variable and dataset attributes

SHOW ATTRIBUTE commands

Attribute keywords

Programmatic access to attributes

Editing attributes

Output attributes to NetCDF fies

Output Variables to NetCDF files

3.2 EXPRESSIONS

Multi-dimensional expressions

XSEQUENCE, YSEQUENCE, ZSEQUENCE, TSEQUENCE

SAMPLEXY_CLOSEST

SCAT2GRIDGAUSS_XY

SCAT2GRIDGAUSS_XZ

SCAT2GRIDGAUSS_YZ

SCAT2GRIDLAPLACE_XY

SCAT2GRIDLAPLACE_XZ

SCAT2GRIDLAPLACE_YZ

Transformations

General information about transformations

Transformations applied to irregular regions

General information about smoothing transformations

@DIN—definite integral

@IIN—indefinite integral

VAR—weighted variance

@SBX:n—boxcar smoother

@SBN:n—binomial smoother

@SHN:n—Hanning smoother

@SPZ:n—Parzen smoother

@SWL:n—Welch smoother

@DDC—centered derivative

@DDF—forward derivative

@DDB—backward derivative

@NGD—number of good points

@NBD—number of bad points

@SUM—unweighted sum

@RSUM—running unweighted sum

@FAV:n—averaging filler

@FLN:n—linear interpolation filler

@FNR—nearest neighbor filler

@LOC—location of

@WEQ—weighted equal; integration kernel

@ITP—interpolate

@CDA—closest distance above

@CDB—closest distance below

@CIA—closest index above

@CIB—closest index below

IF-THEN logic ("masking")

Lists of constants ("constant arrays")

3.3 EMBEDDED EXPRESSIONS

Special calculations using embedded expressions

3.4 DEFINING NEW VARIABLES

Global, local, and default variable definitions

3.5 DEBUGGING COMPLEX HIERARCHIES OF EXPRESSIONS

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