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Full Discussion: Average, min and max in file with header, using awk
Top Forums Shell Programming and Scripting Average, min and max in file with header, using awk Post 302771304 by RudiC on Wednesday 20th of February 2013 08:42:12 AM
Old 02-20-2013
Well, you're on the right track, just need to get your ducks in a row. Look at this an adapt to your needs:
Code:
awk     'NR==1  {max=0;min=1}
         NR>1   {sum+=$6
                 if (min>$6) min=$6
                 if (max<$6) max=$6
                 cnt = NR
                }
         END    {print  sum/(cnt-1), min, max}
        ' file
0.0113093 0.003118 0.01961

Some further reading on awk might be really helpful.
This User Gave Thanks to RudiC For This Post:
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LEARN ABOUT MOJAVE

mpsimagereduceunary

MPSImageReduceUnary(3)					 MetalPerformanceShaders.framework				    MPSImageReduceUnary(3)

NAME

       MPSImageReduceUnary

SYNOPSIS

       #import <MPSImageReduce.h>

       Inherits MPSUnaryImageKernel.

       Inherited by MPSImageReduceColumnMax, MPSImageReduceColumnMean, MPSImageReduceColumnMin, MPSImageReduceColumnSum, MPSImageReduceRowMax,
       MPSImageReduceRowMean, MPSImageReduceRowMin, and MPSImageReduceRowSum.

   Instance Methods
       (nonnull instancetype) - initWithDevice:

   Properties
       MTLRegion clipRectSource

   Additional Inherited Members
Detailed Description
       MPSImageReduce.h  MetalPerformanceShaders

       Copyright:
	   Copyright (c) 2017 Apple Inc. All rights reserved.  Reduction filters for MetalPerformanceShaders

       The MPSImageReduce performs a reduction operation The reduction operations supported are:

       o Reduce row min

       o Reduce column min

       o Reduce row max

       o Reduce column max

       o Reduce row mean

       o Reduce column mean

       o Reduce row sum

       o Reduce column sum

Method Documentation
   - (nonnull instancetype) initWithDevice: (nonnull id< MTLDevice >) device
       Standard init with default properties per filter type

       Parameters:
	   device The device that the filter will be used on. May not be NULL.

       Returns:
	   a pointer to the newly initialized object. This will fail, returning nil if the device is not supported. Devices must be
	   MTLFeatureSet_iOS_GPUFamily2_v1 or later.

       Reimplemented from MPSUnaryImageKernel.

       Reimplemented in MPSImageReduceRowMin, MPSImageReduceColumnMin, MPSImageReduceRowMax, MPSImageReduceColumnMax, MPSImageReduceRowMean,
       MPSImageReduceColumnMean, MPSImageReduceRowSum, and MPSImageReduceColumnSum.

Property Documentation
   - clipRectSource [read],  [write],  [nonatomic],  [assign]
       The source rectangle to use when reading data.  A MTLRegion that indicates which part of the source to read. If the clipRectSource does not
       lie completely within the source image, the intersection of the image bounds and clipRectSource will be used. The clipRectSource replaces
       the MPSUnaryImageKernel offset parameter for this filter. The latter is ignored. Default: MPSRectNoClip, use the entire source texture.

       The clipRect specified in MPSUnaryImageKernel is used to control the origin in the destination texture where the min, max values are
       written. The clipRect.width must be >=2. The clipRect.height must be >= 1.

Author
       Generated automatically by Doxygen for MetalPerformanceShaders.framework from the source code.

Version MetalPerformanceShaders-100				  Thu Feb 8 2018					    MPSImageReduceUnary(3)
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