python - 如何调整刻度数？

Question

这是我的代码：

import plotly.graph_objects as go

fig = go.Figure()
fig.add_trace(go.Bar(
    name='Group 1',
    x=['Var 1', 'Var 2', 'Var 3'], y=[3, 6, 4],
    error_y=dict(type='data', array=[1, 0.5, 1.5]),
    width=0.15
))
fig.add_trace(go.Bar(
    name='Group 2',
    x=['Var 1', 'Var 2', 'Var 3'], y=[4, 7, 3],
    error_y=dict(type='data', array=[0.5, 1, 2]),
    width=0.15
))
fig.update_layout(barmode='group')
fig.show()

输出：

y现在我需要调整轴的刻度数，比如1, 1.5, 2, 2.5，或者减少它，比如2,4,6。

我试图改变y0和dy争论什么都没有改变：

import plotly.graph_objects as go

fig = go.Figure()
fig.add_trace(go.Bar(
    name='Group 1',
    x=['Var 1', 'Var 2', 'Var 3'], y=[3, 6, 4],
    y0 = 0,
    dy = 50,
    error_y=dict(type='data', array=[1, 0.5, 1.5]),
    width=0.15
))
fig.add_trace(go.Bar(
    name='Group 2',
    x=['Var 1', 'Var 2', 'Var 3'], y=[4, 7, 3],
    y0 = 0,
    dy = 50,
    error_y=dict(type='data', array=[0.5, 1, 2]),
    width=0.15
))
fig.update_layout(barmode='group')
fig.show()

问题：如何为我的第一个代码调整轴的 tiks 数量y？

标签： pythonplotplotly

Answer 1

import plotly.graph_objects as go

fig = go.Figure()
fig.add_trace(go.Bar(
    name='Group 1',
    x=['Var 1', 'Var 2', 'Var 3'], y=[3, 6, 4],
    error_y=dict(type='data', array=[1, 0.5, 1.5]),
    width=0.15
))
fig.add_trace(go.Bar(
    name='Group 2',
    x=['Var 1', 'Var 2', 'Var 3'], y=[4, 7, 3],
    error_y=dict(type='data', array=[0.5, 1, 2]),
    width=0.15
))
fig.update_layout(barmode='group',yaxis=dict(
        tickmode = 'linear',
        tick0 = 1,
        dtick = 0.5
    ))
fig.show()

这里的技巧是yaxis在update_layout. xaxis刻度属性也是如此