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import datetime as dt
import numpy as np
from PyQt5.QtWidgets import QApplication
from silx.gui.plot import Plot1D
if 1:
BACKEND = 'gl' # this gives incorrect results
else:
BACKEND = 'mpl' # this works
def makePlot1D():
# Make large value with a relatively small range by creating POSIX time stamps.
base = dt.datetime.today()
dates = [base - dt.timedelta(seconds=x) for x in range(0, 2500, 20)]
x = np.array([d.timestamp() for d in dates], dtype=np.float64)
np.random.seed(seed=1)
y = np.random.random(x.shape) * 12 - 3
print('x range', np.nanmin(x), np.nanmax(x))
print('y range', np.nanmin(y), np.nanmax(y))
plot1D = Plot1D(backend=BACKEND)
xAxis = plot1D.getXAxis()
curve = plot1D.addCurve(x=x, y=y, legend='curve', symbol='o', fill=True)
plot1D.addMarker(x=x[0], y=y[0], legend='marker', text='the marker', draggable=True)
plot1D.addYMarker(y[0], legend='hmarker', text='the H marker', draggable=True)
plot1D.addXMarker(x[0], legend='vmarker', text='the V marker', draggable=True)
plot1D.show()
return plot1D
def main():
global app, plot
app = QApplication([])
plot = makePlot1D()
app.exec_()
if __name__ == "__main__":
main()
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