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Finding Lows with PeakUtils #3

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raoofhujairi opened this issue Apr 26, 2018 · 1 comment

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@raoofhujairi
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commented Apr 26, 2018

Just wanted to command you for your great effort in comparing the options of finding peaks .

as to Peak utils not detecting lows, i found a quick solutions for that , by 馃榾

  1. Inverting the data set ( multiplying by -1)
  2. passing the data set/frame to peakutils.indexes( )

indexes returned are now actually the lows of the data set.
you could plot the lows along with the peaks by passing the indexes to mplot
as indexes for the same signal data.

Quick example

load the date and select columns 
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.
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Dates = df['Date']
Close = df['Close'] # Second column data
Close_Inversed = df['Close'] * -1

peaks  = peakutils.indexes(Close, thres=0.15, min_dist=50)
lows = peakutils.indexes(Close_Inversed, thres=0.15, min_dist=50)

print('Peaks are:\n %s' % (Dates[peaks]))
print('Lows are:\n %s' % (Dates[Lows]))

#plot closing price 
plt.plot(col1,col2, lw=2 )

#plot peaks in green markers
plt.plot(Dates[peaks],Close[peaks], marker="8", markersize=10, color='G', ls="")

#plot buttoms in red markers 
plt.plot(Dates[lows],Close[lows], marker="8", markersize=10, color='R', ls="")

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plt.show()

note the plot below .

Raoof.

2017-01-03

@MonsieurV

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commented Apr 26, 2018

Oh yes, it works neatly!

I added an example inspired by your example. Thanks Raoof!

824eea8
84de6e7

@MonsieurV MonsieurV closed this Apr 26, 2018

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