Make contour of scatter
In python, If I have a set of data
contour
Why does pyplot.contour() require Z to be a 2D array?
The matplotlib.pyplot.contour() function takes 3 input arrays X, Y and Z.
The arrays X and Y specify the x- and y-coordinates of points, while Z specifies the corresponding value of the function of interest evaluated at the points.
Python : 2d contour plot from 3 lists : x, y and rho?
I have a simple problem in python and matplotlib.
I have 3 lists : x, y and rho with rho[i] a density at the point x[i], y[i].
All values of x and y are between -1. and 1. but they are not in a specific order.
How to crop the internal area of a contour?
I am working on Retinal fundus images.The image consists of a circular retina on a black background. With OpenCV, I have managed to get a contour which surrounds the whole circular Retina. What I need is to crop out the circular retina from the black background.
matplotlib – extracting data from contour lines
I would like to get data from a single contour of evenly spaced 2D data (an image-like data).
Python: find contour lines from matplotlib.pyplot.contour()
I’m trying to find (but not draw!) contour lines for some data: