I am unable to set the color of the scatter plot points using the code below:
import matplotlib
matplotlib.use('Qt4Agg')
import matplotlib.pyplot as plt
import numpy as np
plt.scatter(newSpdVals, newEngLoadVals,c='g',marker='+')
#Add the graph title and x/y axis labels
plt.title("Gear Span")
plt.xlabel("Vehicle Speed (mph)")
plt.ylabel("Engine Load %")
plt.show()
No matter what I change the c parameter to ('b','r', etc.), the color of the
scatter plot points are always black. The lists newSpdVals and
newEngLoadVals have 100 dimmensions and are of type numpy.ndarray.
I am using the following software and hardware:
Windows XP
Python 2.7
PyQt4 (I launch the plot from a PyQt GUI. I don't embed the plot in the
GUI).
matplotlib 1.01
In the beginning of the same function where my scatter plot code is, I added
the following code to verify if the problem is due to the matplotlib/PyQt
interface:
a = np.linspace(-10,100,33)
b = np.linspace(-32,400,33)
plt.scatter(a, b,color='g',marker='+')
plt.title("Gear Span")
plt.xlabel("Vehicle Speed (mph)")
plt.ylabel("Engine Load %")
plt.show()
The points for this plot are colored green. I'm able to change the point
color to blue, red, etc.
Any ideas why I can't change the point color of my first graph? Thank you
for your help.
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