ncview allows you to graph netCDF files in a very simple format.
Almost no modification can be done in ncview, but it is good for a quick graphical representation of the data.
To start ncview:
ncview <filename>.nc
A window will then come up, select a variable to plot. Can select the variable out of the options listed under 'var'.
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Note:
When using ncview, be careful of how you exit out of windows. If you click on the x in the upper right hand corner, you will exit the program. Make sure to hit cancel, okay and exit instead.