JFFT.sh

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#!/usr/bin/env zsh
#
# \author mdejong
#
version=1.0
script=${0##*/}
 
if [ -z $JPP_DIR ]; then
    echo "Variable JPP_DIR undefined."
    exit
fi
 
source $JPP_DIR/setenv.sh $JPP_DIR
 
zmodload zsh/mathfunc
 
set_variable   DEBUG              2
set_variable   FREQUENCY          1.0e+3
set_variable   BINWIDTH           2.0e-4
set_variable   NUMBER_OF_POINTS   1000
set_variable   WORKDIR            ${TMPDIR:-/tmp}/                
 
if do_usage $*; then
    usage "$script"
fi
 
$JPP_DIR/examples/JFFT/JSpectrum \
    -o $WORKDIR/spectrum.txt         \
    -n $NUMBER_OF_POINTS             \
    -F $FREQUENCY                    \
    -B $BINWIDTH                     \
    -d $DEBUG
 
JFFT \
    -f $WORKDIR/spectrum.txt         \
    -o $WORKDIR/fft.txt              \
    -B $BINWIDTH                     \
    -d $DEBUG
 
sort -g -k 2,2 $WORKDIR/fft.txt | tail -1 | read -A RESULT
 
echo "Frequency $FREQUENCY - FFT $RESULT[1] $RESULT[2]"
 
rm -f $WORKDIR/{spectrum.txt,fft.txt}