Crunch is a software utility that performs several types of analyses for one or more files. The current version of Crunch includes scales and offsets, crosstalk elimination, peak finding, statistics, azimuth averaging, histogramming, and rainflow cycle counting. Much of the code for Crunch came from my GPP and GenStats programs. Crunch performs many of the same analyses as GPP, but it is more of a batch program, whereas GPP is an interactive program. If you are performing repetitive tasks, Crunch is the better choice.

Crunch was written to process wind-turbine test or simulation data, but it is probably useful for most tabular data.

You may download the following files from our server:

• Crunch Change Log (v3.00.00, 24 KB, 06-April-2007)

  This is a list of changes made to the code.  Look at this text file to see if we've made worthwhile changes since you received your previous version of Crunch.

• Crunch User's Guide (v2.9, 442 KB, 15-October-2003)

  This is the Crunch User's Guide.  Please refer to it when trying to understand how the program works.

• Crunch Archive (v3.00.00, 2.6 MB, 06-April-2007)

  This is a self-extracting archive of Crunch.  It contains the Crunch executable file, sample input files, installation-verification test procedure, change log, and user's guide.  It runs on all 32-bit Windows® platforms.  We created the executable file with Compaq Visual Fortran® v6.6.B.

• NWTC Subroutine Library

  If you are going to recompile Crunch, you will need to include files from this library. To determine what files you need and in which order they should be compiled, see the file "_MergeSrc.bat" in Crunch's Source folder.

If you want to refer to the Crunch website in a report, here is a reference you can use:

NWTC Design Codes (Crunch by Marshall Buhl).  http://wind.nrel.gov/designcodes/postprocessors/crunch/.  Last modified 01-April-2008; accessed 01-April-2008.

Additional links:

• Crunch Alpha-Tester's Page

  If you want to test pre-release versions of Crunch, please check this page for the latest alpha version.