这是我第一次用python绘制条形图。
我的df操作:
key descript score
0 noodles taste 5
1 noodles color -2
2 noodles health 3
3 apple color 7
4 apple hard 9
我的代码:
import matplotlib.pyplot as plt
op['positive'] = op['score'] > 0
op['score'].plot(kind='barh', color=op.positive.map({True: 'r', False: 'k'}), use_index=True)
plt.show()
plt.savefig('sample1.png')
输出:
但这不是我所期望的。在这种情况下,我想用索引不同的键绘制两个图表,并可能使用如下所示的不同颜色:
我该怎么做?
答案 0 :(得分:2)
尝试:
fig, ax = plt.subplots(1,op.key.nunique(), figsize=(15,5), sharex=True)
i = 0
#Fix some data issues/typos
op['key']=op.key.str.replace('noodels','noodles')
for n, g in op.assign(positive=op['score'] >= 0).groupby('key'):
g.plot.barh(y='score', x='descript', ax=ax[i], color=g['positive'].map({True:'red',False:'blue'}), legend=False)\
.set_xlabel(n)
ax[i].set_ylabel('Score')
ax[i].spines['top'].set_visible(False)
ax[i].spines['right'].set_visible(False)
ax[i].spines['top'].set_visible(False)
ax[i].spines['left'].set_position('zero')
i += 1
输出:
fig, ax = plt.subplots(1,op.key.nunique(), figsize=(15,5), sharex=True)
i = 0
#Fix some data issues/typos
op['key']=op.key.str.replace('noodels','noodles')
for n, g in op.assign(positive=op['score'] >= 0).groupby('key'):
g.plot.barh(y='score', x='descript', ax=ax[i], color=g['positive'].map({True:'red',False:'blue'}), legend=False)\
.set_xlabel(n)
ax[i].set_ylabel('Score')
ax[i].spines['top'].set_visible(False)
ax[i].spines['right'].set_visible(False)
ax[i].spines['top'].set_visible(False)
ax[i].spines['left'].set_position('zero')
plt.setp(ax[i].get_yticklabels(), transform=ax[i].get_yaxis_transform())
i += 1
输出: