CODEWITHSUNDEEP
pythonmatplotlibaxis-labels
HopefulPhysicsMajor
HopefulPhysicsMajor

Reputation: 35

Creating the proper axis labels and understanding them

I had to create a contour graph (in python) based on a formula and several other parameters. My graph came out fine. However, my axis labels will not show. I have tried changing the code several times but I am actually a little lost as how to what my real problem is. I know it deals with the command to create the labels but understand the error message

Also, this is my first post and if you have recommendations for how I should ask questions, I would appreciate the help.

def contourf_plot():
    T = np.linspace(0,30,50)
    P = np.linspace(600,1000,50)
    X, Y = np.meshgrid(T,P) 
    Z = (Y/100)*np.e**((12*X)/(X+243))
    Z.shape
    plt.figure()
    CF = plt.contourf(T,P,Z,50)
    plt.colorbar(CF)
    plt.set_Tlabel("Temperature[$\degree$C]")
    plt.set_Plabel("Pressure[Pa]")
    plt.show()
    return

if __name__ == "__main__":
    contourf_plot()

Error message: 'module' object has no attribute 'set_Xlabel'

Upvotes: 1

Views: 59

Answers (1)

DavidG
DavidG

Reputation: 25363

All you need to do is a slight change in your code. You are currently trying to add a label to the axes T and P, though they do not exist (it is still the x and y axes). T and P are just the data that you are trying to plot. 

def contourf_plot():
    T = np.linspace(0,30,50)
    P = np.linspace(600,1000,50)
    X, Y = np.meshgrid(T,P)
    Z = (Y/100)*np.e**((12*X)/(X+243))
    Z.shape
    fig,ax = plt.subplots()  #add this line
    CF = plt.contourf(T,P,Z,50)
    plt.colorbar(CF)
    ax.set_xlabel("Temperature[$\degree$C]")  #sets the x and y label
    ax.set_ylabel("Pressure[Pa]")
    plt.show()
    return

if __name__ == "__main__":
    contourf_plot()

This gives the image

enter image description here

Upvotes: 1

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