Hi All
i'm bring to do simple bar plot formatting the xlabe as 'date' using a syntax
like : fig.autofmt_xdate(bottom=0.1)
but something is wrong in my code, please have you any hints on ghow to proper
display the dates (Year) along the x axis
and how to leave a margin on the left and on the right of the plot? (my
example has a margin only on the right, while the first bar is adjacent to the
Y axis)
###
import numpy as np
import matplotlib.pyplot as plt
x = np.array([1969,1970,1971,1972,1973,1974])
y = np.array([-3,10,23,-4,-5,6])
data = [x,y]
print x
print y
def bar_plot(data, Yval, datamin=None, datamax=None):
""" doc """
fig = plt.figure()
fig.autofmt_xdate(bottom=0.1)
ax1 = fig.add_subplot(211)
x = data[0]
y = data[1]
if datamin != datamax != None :
x = data[0][np.where((data[0]>=datamin) & (data[0]<=datamax))[0]]
y = data[1][np.where((data[0]>=datamin) & (data[0]<=datamax))[0]]
x_p = x[np.where(y>=0)[0]]
y_p = y[np.where(y>=0)[0]]
x_n = x[np.where(y<0)[0]]
y_n = y[np.where(y<0)[0]]
ax1.bar(x_n, y_n, facecolor='b')
ax1.bar(x_p, y_p, facecolor='r')
ax1.grid(True)
ax1.set_xlabel('Year')
ax1.set_ylabel(Yval)
ax1.set_title(Yval)
ax1.axhline(0, color='black', lw=1)
plt.show()
bar_plot(data, 'Var', datamin=1970, datamax=1973)
###
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