---
name: "cmplxpack.c"
section: "3"
platform: "linux"
package: "libg2c-dev"
version: "2.1.0-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/cmplxpack.c"
---

# cmplxpack.c(3)

Pack a data field using a complex packing algorithm.

## NAME

cmplxpack.c - Pack a data field using a complex packing algorithm.

## SYNOPSIS

`#include 'grib2_int.h'`\

### Functions

void **cmplxpack** (float \*fld, **g2int** ndpts, **g2int** idrsnum, **g2int** \*idrstmpl, unsigned char \*cpack, **g2int** \*lcpack)\
 Pack up a data field using a complex packing algorithm.

## Detailed Description

Pack a data field using a complex packing algorithm.

**Author**

Stephen Gilbert

**Date**

2004-08-27

Definition in file **cmplxpack.c**.

## Function Documentation

### void cmplxpack (float \* fld, g2int ndpts, g2int idrsnum, g2int \* idrstmpl, unsigned char \* cpack, g2int \* lcpack)

Pack up a data field using a complex packing algorithm. This function supports GRIB2 complex packing templates with or without spatial differences (i.e. DRTs 5.2 and 5.3). It also fills in GRIB2 Data Representation Template 5.2 or 5.3 with the appropriate values.

**Parameters**

*fld* Contains the data values to pack. \
 *ndpts* The number of data values in array fld \
 *idrsnum* Data Representation Template number. Must equal 2 or 3. \
 *idrstmpl* Contains the array of values for Data Representation Template 5.2 or 5.3

- •

  0 Reference value - ignored on input, set by compack routine.

- •

  1 Binary Scale Factor

- •

  2 Decimal Scale Factor

- •

  6 Missing value management

- •

  7 Primary missing value

- •

  8 Secondary missing value

- •

  16 Order of Spatial Differencing ( 1 or 2 )

*cpack* The packed data field. \
 *lcpack* length of packed field cpack. Will be set to -1 if missing value management field is not 1 or 2.

**Author**

Stephen Gilbert

**Date**

2004-08-27

Definition at line **37** of file **cmplxpack.c**.

References **compack()**, and **misspack()**.

Referenced by **g2\_addfield()**.

## Author

Generated automatically by Doxygen for NCEPLIBS-g2c from the source code.