from rsf.proj import *
import math

n1=400

Flow('spike',None,'spike n1=%d d1=1 o1=1 label1=Sample unit1=' % n1)

waves = []
freqs = []
for j in range(n1//15,n1,n1//5):
    wave = 'wave%d' % j
    waves.append(wave)
    Flow(wave,'spike',
         '''
         math output="(x1-1-%(j)d)/%(n1)d" |
         math output="exp(-input*15)*sin(input*0.95*%(j)d)" |
         window f1=%(j)d | pad beg1=%(j)d
         '''
         % {'n1':n1,'j':j})
    freq = 'freq%d' % j
    freqs.append(freq)
    Flow(freq,'spike',
         '''
         math output="0.95*%(j)d/%(n1)d" |
         window f1=%(j)d | pad beg1=%(j)d
         '''
         % {'n1':n1,'j':j})

Flow('in',waves,'add ${SOURCES[1:%d]}' % len(waves))
Flow('freq',freqs,'cat ${SOURCES[1:%d]}' % len(freqs))
Plot('freq',
     '''
     transp plane=23 | 
     graph min2=0 max2=1 title="Local Frequency" wanttitle=n
     label2="\F2 Frequency" label1="\F2 Sample" unit2=cycles
     parallel2=n format2="%3.1f"
     ''')

Flow('shift','in','shift1 ns=2')
Flow('pef pre','shift in',
     'lpf match=${SOURCES[1]} rect1=7 pred=${TARGETS[1]}')
Flow('err','pre in','add scale=-1,1 ${SOURCES[1]}')

Result('lpf','in err',
       '''
       cat axis=2 ${SOURCES[1]} |
       dots yreverse=1 strings=1 connect=3 labels=Input:Deconvolution
       label1="\F2 Sample"
       ''')

Flow('atten','pef','window n2=1 f2=1 | math output="sqrt(-input)" ')
Flow('ifreq','pef atten','window n2=1 | math atten=${SOURCES[1]} output="acos(input/(2*atten))" ')

Plot('ifreq','graph wanttitle=n min2=0 max2=1 dash=1 wantaxis=n')

Result('freq','freq ifreq','Overlay')

End()