用Matplotlib绘制图

Question

I have a Dataframe(153 rows X 2 columns) - with Column 1 - Complaint Type (String) and Column 2 - Count (int)

I need to plot this with y axis = count and x axis = complaint type(string)

I saw an answer that i can use xticks to use string as my x axis labels -

x = np.array([0,1,2,3])
y = np.array([20,21,22,23])
my_xticks = ['John','Arnold','Mavis','Matt']
plt.xticks(x, my_xticks)
plt.plot(x, y)
plt.show()

But how can i plot when i don't even have integer/float values as my variables. I get Value Error: Cannot convert string to float.

Answer 1

如果需要条形图，可以调用df.plot.bar('Complaint Type', 'Count')

Answer 2

Use DataFrame.plot.bar :

df.plot.bar(x='col1', y='col2')

Solution for lines with DataFrame.plot :

df.plot(x='col1', y='col2')