f_multi_unlimited.f90 File Reference

Demonstrates multiple unlimited dimensions (NetCDF-4 feature, Fortran) More...

Functions/Subroutines
program	f_multi_unlimited
subroutine	validate_file ()

Detailed Description

Demonstrates multiple unlimited dimensions (NetCDF-4 feature, Fortran)

Fortran equivalent of multi_unlimited.c, showcasing NetCDF-4's multiple unlimited dimensions using the Fortran 90 NetCDF API. Demonstrates appending along both dimensions.

Learning Objectives:

• Create multiple unlimited dimensions in Fortran
• Append data along different unlimited dimensions
• Work with ragged arrays in Fortran

Fortran Multiple Unlimited:

• Define with nf90_def_dim(ncid, name, NF90_UNLIMITED, dimid)
• Can have unlimited dimensions in any position (NetCDF-4 only)
• Use nf90_put_var with start/count for appending

Prerequisites:

• f_unlimited_dim.f90 - Single unlimited dimension
• multi_unlimited.c - C equivalent

Related Examples:

• multi_unlimited.c - C equivalent
• f_unlimited_dim.f90 - Single unlimited (classic compatible)

Compilation:

gfortran -o f_multi_unlimited f_multi_unlimited.f90 -lnetcdff -lnetcdf

Note

Companion code for "The NetCDF Developer's Handbook: The Authoritative Guide to Writing High-Performance Programs for Scientific Data Management, Second Edition" (https://www.amazon.com/dp/B0H7Q1Z75L)

Author

Edward Hartnett, Intelligent Data Design, Inc.

Date

2026

Function/Subroutine Documentation

f_multi_unlimited()

program f_multi_unlimited

validate_file()

subroutine f_multi_unlimited::validate_file