Python: make dual vector dot-product more pythonic
I have this dot product, calculating weighted means, and is applied to two columns in a list:
The calculation is a running dot-product, ie the list of temperature samples is far larger than the list of weights, hence the correction of subtracting len(weights) at the end of the main loop.
This traverses the list of weights twice, which is inefficient and degrades performance. How could this be done in a more pythonic way?
I also have concerns about the main loop. Would this be considered more pythonic?:
Last edited by figaro; 11-18-2019 at 06:01 PM..
Reason: Emphasise the fact that the lists are not of the same length, ie the dot product calculates a running weighted mean.
I do beg for my bad english ofr advance (french..)
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LEARN ABOUT DEBIAN
hugin_hdrmerge
HUGIN_HDRMERGE(1) HUGIN HUGIN_HDRMERGE(1)NAME
hugin_hdrmerge - Merge overlapping images
SYNOPSIS
hugin_hdrmerge [options] -o output.exr input-files
DESCRIPTION
TODO.
OPTIONS -o prefix
Output file
-m mode
Merge mode, can be one of: avg, avg_slow, khan (default), if avg, no -i, -s, or -d options apply
-i iter
Number of iterations to execute (default is 1)
-c Only consider pixels that are defined in all images (avg mode only)
-s file
Debug files to save each iteration, can be one of:
a - all debug files (can only be used alone)
w - calculated weights from each iteration
r - result image from each iteration
s - source images before processing
If verbose >= 3, all debug files are output unless specified
-a calcs
Apply one or more advanced calculations, can be one or more of:
b - biasing weights logarithmically
c - choose pixels with highest weight instead of averaging (overrides options -a b and -a d)
d - choose a pixel with the highest weight instead of averaging when all pixel weights are within 10% of each other
h - favour a high signal to noise ratio
i - ignore alpha channel
-e Export each initial weight to <input_file_paths>_iw.<ext>
-l Load a previously exported initial weight with respect to the input file names
NOTE: if both -e and -l options are on, the program will calculate and save the initial weights, then wait until user indicates that it
can continue by loading the previously saved weights
-v Verbose, print progress messages, repeat for even more verbose output
-h Display help summary.
AUTHORS
Written by Jing Jin. Also contains contributions from Pablo d'Angelo, Douglas Wilkins, Ippei Ukai, Ed Halley, Bruno Postle, Gerry Patterson
and Brent Townshend.
This man page was written by Cyril Brulebois <cyril.brulebois@enst-bretagne.fr> and is licensed under the same terms as the hugin package
itself.
"Version: 2011.4.0" 2011-12-02 HUGIN_HDRMERGE(1)