Slow FFT in ksh93 and awk. Post: 303023213

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Operating Systems OS X (Apple) Slow FFT in ksh93 and awk. Post 303023213 by wisecracker on Thursday 13th of September 2018 03:49:45 AM

09-13-2018

Registered User

Pur awk FFT.

Quote:

Originally Posted by Corona688

Another thing you can do to speed it up is keep it running - feed it input and read it output at need, rather than starting and killing it all the time. How to do that depends on what your input data would look like and what you'd want for your output data.

There is one error and corrected for the correct results, note the minus sign in red:
SUMIMAG += -REAL_ARRAY[T]*SIN_ANGLE + IMAG_ARRAY[T]*COS_ANGLE;
Correct results:

Code:

Real:
 8.50 3.64 -1.71 0.05 1.50 -0.17 -0.29 0.48 0.50 0.48 -0.29 -0.17 1.50 0.05 -1.71 3.64
Imaginary:
 0.00 -1.93 -0.50 -0.24 -1.00 0.47 0.50 -1.22 0.00 1.22 -0.50 -0.47 1.00 0.24 0.50 1.93

Otherwise phenominal.
Thanks a lot...
(This has taught me more about awk than ANY tutorial or info from the mighty WWW and for that I can only say thank you.)

Last edited by wisecracker; 09-14-2018 at 07:44 AM.. Reason: Add title.

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LEARN ABOUT REDHAT

glcolormask

GLCOLORMASK(3G) 														   GLCOLORMASK(3G)

NAME

       glColorMask - enable and disable writing of frame buffer color components

C SPECIFICATION

       void glColorMask( GLboolean red,
			 GLboolean green,
			 GLboolean blue,
			 GLboolean alpha )

PARAMETERS

       red, green, blue, alpha
			     Specify  whether  red, green, blue, and alpha can or cannot be written into the frame buffer.  The initial values are
			     all GL_TRUE, indicating that the color components can be written.

DESCRIPTION

       glColorMask specifies whether the individual color components in the frame buffer can or cannot be written.  If red is GL_FALSE, for  exam-
       ple, no change is made to the red component of any pixel in any of the color buffers, regardless of the drawing operation attempted.

       Changes to individual bits of components cannot be controlled.  Rather, changes are either enabled or disabled for entire color components.

ERRORS

       GL_INVALID_OPERATION is generated if glColorMask is executed between the execution of glBegin and the corresponding execution of glEnd.

ASSOCIATED GETS

       glGet with argument GL_COLOR_WRITEMASK
       glGet with argument GL_RGBA_MODE

SEE ALSO

       glClear(3G), glColor(3G), glColorPointer(3G), glDepthMask(3G), glIndex(3G), glIndexPointer(3G), glIndexMask(3G), glStencilMask(3G)

																   GLCOLORMASK(3G)