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+--- Thread: Plotting level curves (isocurves) with pyqtgraph (/thread-193.html)
Plotting level curves (isocurves) with pyqtgraph - alexfrigo - Sep-29-2016
Hi everyone,
I am trying to plot a red loop (isocurve) that correspond to the level z=2 of a given surface. Maybe I am able to create the isocurve, but I cannot overlap it to the grayscale image. (Output image)
I have been trying for days, but wasn't able to find any working example on the internet (isocurve.py included).
Can anybody provide me a working piece of code?
Thank you very much.
Here's the code.
from pyqtgraph.Qt import QtGui,QtCore
import numpy as np
import pyqtgraph as pg
import sys
app=QtGui.QApplication([])
x=np.linspace(0,6.28,30)
y=x[:]
xx,yy=np.meshgrid(x,y)
z=np.sin(xx)+np.cos(yy)
window=pg.GraphicsWindow()
window.setWindowTitle('isocurve example')
vb=window.addViewBox()
img=pg.ImageItem(z)
vb.addItem(img)
vb.setAspectLocked()
c=pg.IsocurveItem(level=2,pen='b')
c.setParentItem(img)
c.setZValue(0.5)
vb.addItem©
window.show()
sys.exit(app.exec_())
I forgot to say that I am forced to use the library pyqtgraph.
matplotlib solutions are not allowed.
RE: Plotting level curves (isocurves) with pyqtgraph - micseydel - Oct-03-2016
Since this is relatively specialized, you might want to try a more specialized community. If you do find the answer though, we'd definitely be curious about the solution!
RE: Plotting level curves (isocurves) with pyqtgraph - alexfrigo - Oct-03-2016
[SOLVED] here: http://stackoverflow.com/questions/39792905/level-curves-with-pyqtgraph-isocurve