34 lines
978 B
Python
34 lines
978 B
Python
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"""
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Demonstrates the usage of DateAxisItem to display properly-formatted
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timestamps on x-axis which automatically adapt to current zoom level.
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"""
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import initExample ## Add path to library (just for examples; you do not need this)
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import time
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from datetime import datetime, timedelta
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import numpy as np
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import pyqtgraph as pg
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from pyqtgraph.Qt import QtGui
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app = QtGui.QApplication([])
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# Create a plot with a date-time axis
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w = pg.PlotWidget(axisItems = {'bottom': pg.DateAxisItem()})
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w.showGrid(x=True, y=True)
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# Plot sin(1/x^2) with timestamps in the last 100 years
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now = time.time()
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x = np.linspace(2*np.pi, 1000*2*np.pi, 8301)
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w.plot(now-(2*np.pi/x)**2*100*np.pi*1e7, np.sin(x), symbol='o')
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w.setWindowTitle('pyqtgraph example: DateAxisItem')
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w.show()
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## Start Qt event loop unless running in interactive mode or using pyside.
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if __name__ == '__main__':
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import sys
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if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
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app.exec_()
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