File	Date	Author	Commit
test	2016-02-12	rsz	[a93d9f] Modernized test.
LICENSE	2016-02-12	rsz	[e5d784] Initial git commit.
Makefile	2016-02-12	rsz	[d365be] Updated dist target and version.
README	2016-02-12	rsz	[e5d784] Initial git commit.
ncclamp.c	2016-02-12	rsz	[d365be] Updated dist target and version.

Read Me

OVERVIEW

ncclamp is a command-line tool for NetCDF files that allows you to replace values in-place by specifying the variable, the old value to be replaced, the new value, and a comparison operator.  The change is applied across all of the variable's dimensions, including the record dimension if any.  

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EXAMPLES

The following example would mask a variable "topography" to be Not-a-Number every below sea level.

	ncclamp foo.nc topography 0 nan lt

This example would replace a value with -infinity.

	ncclamp foo.nc var1 -1e9 -inf eq

This would create a binary mask of a variable.

	ncclamp foo.nc veg -9999 0 eq
	ncclamp foo.nc veg 0 1 neq

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INSTALLATION

To build and install, do the following:

	make
	make test	
	cp ncclamp /usr/local/bin
	make clean

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SUPPORT

For comments or help, contact remik dot_ ziemlinski att_ noaa dot_ gov.

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CHANGES

20061208 rsz Created.