Gridding and ploting

[Felipe]

Hi guys,

I have a txt file with 4 columns. The first two (y,x) are coordinates and the last one (z) is density. Here's my input:

Output:
    y          x     h      z
54.424013 -6.33163 210.9 2347.553
54.429837 -6.330484 198.9 2156.3
54.418983 -6.326504 193.8 2465.166
54.439936 -6.331769 178.6 2406.85
54.431123 -6.327935 175.6 2045.064
54.421964 -6.324441 169.2 2482.016

I'd like to use x,y,z to construct a gridd and plot using plt.contourf(x,y,z). The desired output is a figure that can be used like a map, showing the distribution of the density on the area delimited by the coordinates.

I tried something like that but without success:

1 2 3 4 5 6 7 8 9 10

#!/usr/bin/env python3   import numpy as np from scipy.interpolate import griddata import matplotlib.pyplot as plt   with open("lagan200.txt","r") as fh:     y,x,h,z=np.loadtxt(fh, delimiter=' ',usecols=[0,1,2,3], unpack=True)     zz = np.meshgrid(z, indexing='ij')        test = plt.contourf(x,y,zz)

Thanks for the help !!

[Larz60+]

Check the following to see if they may be of help (all but the last use matplotlib)
http://matplotlib.org/mpl_toolkits/mplot...orial.html
http://matplotlib.org/examples/pylab_exa..._demo.html
http://matplotlib.org/examples/mplot3d/c...demo3.html

https://plot.ly/python/3d-surface-plots/

[Felipe]

Check the following to see if they may be of help (all but the last use matplotlib)
http://matplotlib.org/mpl_toolkits/mplot...orial.html
http://matplotlib.org/examples/pylab_exa..._demo.html
http://matplotlib.org/examples/mplot3d/c...demo3.html

https://plot.ly/python/3d-surface-plots/

Thanks !! I'll try this.