ncplot is an X-Windows based program using the Motif GUI toolkit. OpenMotif is available for RHEL via yum(1) ("yum install openmotif-devel"). For Fedora, visit the PBone repository and retreive the ccrma openmotif RPMs.
ncplot requires netCDF 3.0 or later be installed. netCDF RPMs are available via yum for all Redhat and Fedora products. Optionally you can build netCDF from source from Unidata. ncplot does not require netCDF to be built with HDF5.
For RHEL 6 and Fedora 10+ the fonts used by ncplot, ncpp, and xpms2d are not installed by default. If you get core dumps on start up, or messages about fonts not found and square boxes instead text, then try this: