CODEWITHSUNDEEP
pythonmatplotlibaxis
BuJay
BuJay

Reputation: 127

change order x axis matplotlib

I am trying to get this chart to show the x axis starting at G and ending with A (left to right). The Udemy instructor wrote this exact same code and generated the desired results - my x axis seems backwards....and of course, the instructor has not addressed the question.

def plot_by_woe(df, rotation_of_x_axis_labels = 0):
x = df.iloc[:, 0].apply(str)
y = df['WoE']
plt.figure(figsize = (18,6))
plt.plot(x, y, marker='o', linestyle = '--', color = 'k')
plt.xlabel(df.columns[0])
plt.ylabel('Weight of Evidence')
plt.title(str('Weight of Evidence by ' + df.columns[0]))
plt.xticks(rotation = rotation_of_x_axis_labels)

df = pd.DataFrame(
[['G',-1.113459],
 ['F',-0.975440],
 ['E',-0.678267],
 ['D',-0.391843],
 ['C',-0.049503],
 ['B',0.358476],
 ['A',1.107830]],
columns = ['grade', 'WoE'])
df

plot_by_woe(df)

enter image description here

Upvotes: 0

Views: 1149

Answers (3)

BuJay
BuJay

Reputation: 127

Apparently, there is a bug in the matplotlib version I am using ('2.1.2' and earlier)

How to prevent alphabetical sorting for python bars with matplotlib?

I have tried a bunch of workarounds but haven't found a solution yet. At least we have an explanation.

Upvotes: 0

Elena_Kosourova
Elena_Kosourova

Reputation: 71

All in all, here's my code:

def plot_by_woe(df, rotation_of_x_axis_labels = 0):
    x = df.iloc[:, 0].apply(str)
    y = df['WoE']
    plt.figure(figsize = (18,6))
    plt.plot(x, y, marker='o', linestyle = '--', color = 'k')
    plt.xlabel(df.columns[0])
    plt.ylabel('Weight of Evidence')
    plt.title(str('Weight of Evidence by ' + df.columns[0]))
    plt.xticks(rotation = rotation_of_x_axis_labels)

df = pd.DataFrame(
[['G',-1.113459],
 ['F',-0.975440],
 ['E',-0.678267],
 ['D',-0.391843],
 ['C',-0.049503],
 ['B',0.358476],
 ['A',1.107830]],
columns = ['grade', 'WoE'])

plot_by_woe(df)

Upvotes: 2

Elena_Kosourova
Elena_Kosourova

Reputation: 71

As far as I understood, you want to get the following graph, right?

graph

If so, then your function seems to work well, just call it at the end of your code:

plot_by_woe(df)

Upvotes: 2

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