Python绘图格式轴号为%

Question

这是数据框

df = pd.DataFrame({"col_1":[0.00143,0.00653,0.00732],"col_2":[0.00984,0.00192,0.00751]},index=['A','B','C'])

这是我的密码：

trace0 = go.Bar(
x=[df.columns[0],df.columns[1]],
y=[df.ix[0,0],df.ix[0,1]],
name=df.index[0],
# marker=dict(color=cof_pal[0]
)


trace1 = go.Bar(
x=[df.columns[0],df.columns[1]],
y=[df.ix[1,0],df.ix[1,1]],
name=df.index[1],
# marker=dict(color=cof_pal[1]
)



trace2 = go.Bar(
x=[df.columns[0],df.columns[1]],
y=[df.ix[2,0],df.ix[2,1]],
name=df.index[2],
# marker=dict(color=cof_pal[2]
)


layout = go.Layout(showlegend=True, title="Title", font=dict(size=Chart_Title_Font_Size),
               yaxis=dict(title='Percentage Change(%)', titlefont=dict(size=yaxis_font_size), tickfont=dict(size=yaxis_font_size)),
               xaxis=dict(title='Time', titlefont=dict(size=xaxis_font_size), tickfont=dict(size=yaxis_font_size))
              )


data = [trace0,trace1,trace2]

fig = go.Figure(data=data, layout=layout)
iplot(fig, filename='fig1')

我需要y轴是x.xx%格式（或小数点后n位）。

另一个问题是：y轴标题“百分比变化（%）”太接近y轴编号。如何进一步推进？

Answer 1

您可以在布局选项中使用ticksuffix。

yaxis=dict(ticksuffix=".00%")

layout = go.Layout(                
                yaxis=dict(ticksuffix=".00%", tickangle=45, title='Percentage Change(%)')

https://plot.ly/python/reference/#layout-yaxis

Answer 2

您可以在layout选项中设置^{}。

layout = go.Layout(yaxis=dict(tickformat=".2%"))