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Add kind='line' or 'bar' argument to DataFrame.plot #348

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Add kind='line' or 'bar' argument to DataFrame.plot #348

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62 changes: 46 additions & 16 deletions pandas/core/frame.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2805,8 +2805,8 @@ def clip_lower(self, threshold):
#----------------------------------------------------------------------
# Plotting

def plot(self, subplots=False, sharex=True, sharey=False, use_index=True,
figsize=None, grid=True, legend=True, ax=None, **kwds):
def plot(self, kind='line', subplots=False, sharex=True, sharey=False, use_index=True,
figsize=None, grid=True, legend=True, rot=30, ax=None, **kwds):
"""
Make line plot of DataFrame's series with the index on the x-axis using
matplotlib / pylab.
Expand Down Expand Up @@ -2842,22 +2842,49 @@ def plot(self, subplots=False, sharex=True, sharey=False, use_index=True,
else:
fig = ax.get_figure()

if use_index:
x = self.index
else:
x = range(len(self))
if kind == 'line':
if use_index:
x = self.index
else:
x = range(len(self))

for i, col in enumerate(_try_sort(self.columns)):
empty = self[col].count() == 0
y = self[col].values if not empty else np.zeros(x.shape)
if subplots:
ax = axes[i]
ax.plot(x, y, 'k', label=str(col), **kwds)
ax.legend(loc='best')
else:
ax.plot(x, y, label=str(col), **kwds)

ax.grid(grid)
elif kind == 'bar':
N = len(self)
M = len(self.columns)
xinds = np.arange(N) + 0.25
colors = ['red', 'green', 'blue', 'yellow', 'black']
rects = []
labels = []
for i, col in enumerate(_try_sort(self.columns)):
empty = self[col].count() == 0
y = self[col].values if not empty else np.zeros(x.shape)
if subplots:
ax = axes[i]
ax.bar(xinds, y, 0.5,
bottom=np.zeros(N), linewidth=1, **kwds)
ax.set_title(col)
else:
rects.append(ax.bar(xinds+i*0.5/M,y,0.5/M,bottom=np.zeros(N),color=colors[i % len(colors)], **kwds))
labels.append(col)

for i, col in enumerate(_try_sort(self.columns)):
empty = self[col].count() == 0
y = self[col].values if not empty else np.zeros(x.shape)
if subplots:
ax = axes[i]
ax.plot(x, y, 'k', label=str(col), **kwds)
ax.legend(loc='best')
if N < 10:
fontsize = 12
else:
ax.plot(x, y, label=str(col), **kwds)
fontsize = 10

ax.grid(grid)
ax.set_xticks(xinds + 0.25)
ax.set_xticklabels(self.index, rotation=rot, fontsize=fontsize)

# try to make things prettier
try:
Expand All @@ -2866,7 +2893,10 @@ def plot(self, subplots=False, sharex=True, sharey=False, use_index=True,
pass

if legend and not subplots:
ax.legend(loc='best')
if kind == 'line':
ax.legend(loc='best')
else:
ax.legend([r[0] for r in rects],labels,loc='best')

plt.draw_if_interactive()

Expand Down