Python -Two figures in one plot

Question

I have two python plot functions:

def plotData(data):
    fig, ax = plt.subplots()
    results_accepted = data[data['accepted'] == 1]
    results_rejected = data[data['accepted'] == 0]
    ax.scatter(results_accepted['exam1'], results_accepted['exam2'], marker='+', c='b', s=40)
    ax.scatter(results_rejected['exam1'], results_rejected['exam2'], marker='o', c='r', s=30)
    ax.set_xlabel('Exam 1 score')
    ax.set_ylabel('Exam 2 score')
    return ax

And second function is:

def plot_boundry(theta,x):
    """
    """
    plt.figure(1)
    px = np.array([x[:, 1].min() - 2, x[:, 1].max() + 2])
    py = (-1 / theta[2]) * (theta[1] * px + theta[0])
    fig, ax = plt.subplots()
    ax.plot(px, py)
    return ax

And i am calling both :

#####PLOT ######
ax = plotData(df)
ax = plot_boundry(opt_theta, x)

I get 2 separate plots:

I got 2 separate picture.How Do I add two plot into one. Both the plot should be one plot.

Just pass in the ax that is returned from plotData to plot_boundary and use that to plot. Or create the ax outside of the functions and pass it in to both. — AChampion
– AChampion, Commented Sep 30, 2016 at 14:16

Community · Accepted Answer · 2017-05-23 11:48:19Z

2

It depends what you want exactly:

If you want the two figures overlayed, then you can call hold(True) after the first, then plot the second, then call hold(False).
If you want the two figures in a single figure, but side by side (or one over the other), then you can use subplot. E.g., call subplot(2, 1, 1) before plotting the first, then subplot(2, 1, 2) before the second.

edited May 23, 2017 at 11:48

CommunityBot

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answered Sep 30, 2016 at 14:14

Ami Tavory

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1 Comment

Ami Tavory Over a year ago

@Aman Not exactly - you used subplots, not subplot. Note that in subplots, you seem to be missing a 2 parameter.

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