May 20, 2019 · The x and y values define a 2d plane with the length (x-Axis) of 7 values and depth (y-Axis) of 2 values. The z values define the colour at the corresponing points (more or less a z-Axis). I've tried:

Jan 25, 2012 · 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 spe...

It seems that histogram2d takes some fiddling to plot the contour in the right place. I took the transpose of the histogram matrix and also took the mean values of the elements in xedges and yedges instead of just removing one from the end.

Aug 15, 2020 · Let me begin this query by admitting that I am very new to Python. I want to create contour plot of the data in Python so as to automate the process, which otherwise can be easily carried out using Surfer. I have 1000s of such data files, …

Oct 14, 2014 · Also, only mildly annoying, but the contour lines colors won't line up with the colors in the 2d histogram since the histogram colorscale has been log transformed. To fix this you can manually specify levels for the contour plot. Making these …

Feb 5, 2017 · Matplotlib's contour is based on a rectangular grid. But even so, allowing contour(z), with z being a 1D array, would make it impossible to know how the field should be plotted. In the case of contour(Z) where Z is a 2D array, its shape unambiguously sets the grid for the plot.

Aug 21, 2015 · If Z is 1-D data, it's just not going to work on a contour plot. By definition, contour pots requre Z values to be a 2d matrix. Think about it, every value on your contour point has to exist at some x and y point, so it has to be 2d.

Nov 17, 2015 · So I have used matplotlib cookbook to generate the following grayscale gaussian contours: import numpy as np from scipy.interpolate import griddata import matplotlib.pyplot as plt import numpy.ma ...

May 3, 2021 · To have a contour plot, z needs to be 2d matrix with all values for the points (x,y). You can think the data needed for a contour plot, as a DataFrame where index is x, columns are y and values are z. So z needs to be a 2d array of shape (x.size, y.size). Since your z is not a 2d matrix but a 1d array, you cannot have a contour plot.

Jan 27, 2017 · As the title indicates I would like to make a contour plot by using three 1D arrays. Let's say that. x = np.array([1,2,3]) and. y = np.array([1,2,3]) and . z = np.array([20,21,45]) To do a contourplot in matplotlib i meshed the x and y coordinate as X,Y = meshgrid(x,y) but then the z array must also be a 2D array.