Scott, the Scatter function works great but i am really looking to use the
contourf one.
Eric, you're right, the way I had it initially it was missing the z value. I
looked at the griddata example and here is the code I came up with:
from numpy.random import uniform, seed
from matplotlib.mlab import griddata
import matplotlib.pyplot as plt
import numpy as np
r =
mlab.csv2rec('D:/SocalScubaInfo/Data/Outputs/CSV_files/DIRPW_12191800.csv')
x = r.longitude
y = r.latitude
z = r.dirpw_200812191800
xi = r.x
yi = r.y
# grid the data.
zi = griddata(x,y,z,xi,yi)
CS = plt.contourf(xi,yi,zi,15,cmap=plt.cm.jet)
plt.colorbar() # draw colorbar
plt.show()
Which still errors out: 'output grid defined by xi,yi must be monotone
increasing'
The xi and yi are from the first 2 columns of the csv file and I thought
they were monotonically increasing. What am I missing?
antonv wrote:
>
> Hi all,
>
> I am pretty new to matplotlib and I have a big issue... I am trying to
> plot data from a grib file from noaa and I am not sure what's the best way
> to go about it. Until now, I am extracting the data i need in CSV files
> but I am not able to plot it. Here is a sample of the code that I am
> using:
>
> import matplotlib.pyplot as plt
> import matplotlib.mlab as mlab
>
> r =
> mlab.csv2rec('D:/SocalScubaInfo/Data/Outputs/CSV_files/DIRPW_12191800.csv')
> plt.contour(r.longitude, r.latitude)
> plt.show()
>
> Which errors out and requires a 2d array.
>
> By the way, here is a data file: http://downloads.75ive.com/testdata.csv
> http://downloads.75ive.com/testdata.csv
>
> Any help is appreciated!
>
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