我正在使用 matplotlib 基于数据框制作步骤图，但我希望显示数据框的键/值之一( signals_df['Gage'] )，而不是坐标作为注释，但我总是收到错误:AttributeError: 'Line2D' object has no attribute 'get_offsets'当我从下到上单击第一个子图并且注释没有出现时。其实我注释掉了annot.set_visible(False)并替换了 ""Với val_gage 的示例，这样当单击子图中的某个点时，它看起来就像我希望注释一个一个地出现。
这是有问题的代码:

nhập pandas dưới dạng pd
nhập numpy dưới dạng np
import matplotlib as mtpl
from matplotlib import pyplot as plt
import matplotlib.ticker as ticker

annot = mtpl.text.Annotation

data = {
    # 'Name': ['Status', 'Status', 'HMI', 'Allst', 'Drvr', 'CurrTUBand', 'RUSource', 'RUReqstrPriority', 'RUReqstrSystem', 'RUResReqstStat', 'CurrTUBand', 'DSP', 'SetDSP', 'SetDSP', 'DSP', 'RUSource', 'RUReqstrPriority', 'RUReqstrSystem', 'RUResReqstStat', 'Status', 'Delay', 'Status', 'Delay', 'HMI', 'Status', 'Status', 'HMI', 'DSP'],
    # 'Value': [4, 4, 2, 1, 1, 1, 0, 7, 0, 4, 1, 1, 3, 0, 3, 0, 7, 0, 4, 1, 0, 1, 0, 1, 4, 4, 2, 3],
    # 'Gage': ['H1', 'H3', 'H3', 'H3', 'H3', 'H3', 'H3', 'H3', 'H3', 'H3', 'H3', 'H3', 'H3', 'H3', 'H3', 'H3', 'H3', 'H3', 'H3', 'H1', 'H1', 'H3', 'H3', 'H3', 'H1', 'H3', 'H3', 'H3'],
    # 'Id_Par': [0, 0, 0, 0, 0, 0, 10, 10, 10, 10, 10, 0, 0, 22, 22, 28, 28, 28, 28, 0, 0, 38, 38, 0, 0, 0, 0, 0]
    'Name': ['Lamp_D_Rq', 'Status', 'Status', 'HMI', 'Lck_D_RqDrv3', 'Lck_D_RqDrv3', 'Lck_D_RqDrv3', 'Lck_D_RqDrv3', 'Lamp_D_Rq', 'Lamp_D_Rq', 'Lamp_D_Rq', 'Lamp_D_Rq'],
    'Value': [0, 4, 4, 2, 1, 1, 2, 2, 1, 1, 3, 3],
    'Gage': ['F1', 'H1', 'H3', 'H3', 'H3', 'F1', 'H3', 'F1', 'F1', 'H3', 'F1', 'H3'],
    'Id_Par': [0, 0, 0, 11, 0, 0, 0, 0, 0, 0, 0, 0]
    }

signals_df = pd.DataFrame(data)


def plot_signals(signals_df):
    print(signals_df)
    # Count signals by parallel
    signals_df['Count'] = signals_df.groupby('Id_Par').cumcount().add(1).mask(signals_df['Id_Par'].eq(0), 0)
    # Subtract Parallel values from the index column
    signals_df['Sub'] = signals_df.index - signals_df['Count']
    id_par_prev = signals_df['Id_Par'].unique()
    id_par = np.delete(id_par_prev, 0)
    signals_df['Prev'] = [1 if x in id_par else 0 for x in signals_df['Id_Par']]
    signals_df['Final'] = signals_df['Prev'] + signals_df['Sub']
    # Convert and set Subtract to index
    signals_df.set_index('Final', inplace=True)

    # Get individual names and variables for the chart
    names_list = [name for name in signals_df['Name'].unique()]
    num_names_list = len(names_list)
    num_axisx = len(signals_df["Name"])

    # Matplotlib's categorical feature to convert x-axis values to string
    x_values = [-1, ]
    x_values += (list(set(signals_df.index)))
    x_values = [str(i) for i in sorted(x_values)]

    # Creation Graphics
    fig, ax = plt.subplots(nrows=num_names_list, figsize=(10, 10), sharex=True)
    plt.xticks(np.arange(0, num_axisx), color='SteelBlue', fontweight='bold')

    # Loop to build the different graphs
    for pos, name in enumerate(names_list):
        # Creating a dummy plot and then remove it
        dummy, = ax[pos].plot(x_values, np.zeros_like(x_values))
        dummy.remove()

        # Get names by values and gage data
        data = signals_df[signals_df["Name"] == name]["Value"]
        data_gage = signals_df[signals_df["Name"] == name]["Gage"]

        # Get values axis-x and axis-y
        x_ = np.hstack([-1, data.index.values, len(signals_df) - 1])
        y_ = np.hstack([0, data.values, data.iloc[-1]])
        y_gage = np.hstack(["", "-", data_gage.values])
        # print(y_gage)

        # Plotting the data by position
        steps = ax[pos].plot(x_.astype('str'), y_, drawstyle='steps-post', marker='*', markersize=8, color='k', linewidth=2)
        ax[pos].set_ylabel(name, fontsize=8, fontweight='bold', color='SteelBlue', rotation=30, labelpad=35)
        ax[pos].yaxis.set_major_formatter(ticker.FormatStrFormatter('%0.1f'))
        ax[pos].yaxis.set_tick_params(labelsize=6)
        ax[pos].grid(alpha=0.4, color='SteelBlue')
        # Labeling the markers with Values and Gage
        xy_temp = []
        for i in range(len(y_)):
            if i == 0:
                xy = [x_[0].astype('str'), y_[0]]
                xy_temp.append(xy)
            khác:
                xy = [x_[i - 1].astype('str'), y_[i - 1]]
                xy_temp.append(xy)

            # Creating values in text inside the plot
            ax[pos].text(x=xy[0], y=xy[1], s=str(xy[1]), color='k', fontweight='bold', fontsize=12)

            for val_gage, xy in zip(y_gage, xy_temp):
                annot = ax[pos].annotate(val_gage, xy=xy, xytext=(-20, 20), textcoords="offset points",
                                         bbox=dict(boxstyle="round", fc="w"),
                                         arrowprops=dict(arrowstyle="->"))
                # annot.set_visible(False)

    # Function for storing and showing the clicked values
    def update_annot(ind):
        print("Enter update_annot")
        coord = steps[0].get_offsets()[ind["ind"][0]]
        annot.xy = coord
        text = "{}, {}".format(" ".join(list(map(str, ind["ind"]))),
                                " ".join([y_gage[n] for n in ind["ind"]]))
        annot.set_text(text)
        annot.get_bbox_patch().set_alpha(0.4)

    def on_click(event):
        print("Enter on_click")
        vis = annot.get_visible()
        # print(event.inaxes)
        # print(ax[pos])
        # print(event.inaxes == ax[pos])
        if event.inaxes == ax[pos]:
            cont, ind = steps[0].contains(event)
            if cont:
                update_annot(ind)
                annot.set_visible(True)
                fig.canvas.draw_idle()
            khác:
                if vis:
                    annot.set_visible(False)
                    fig.canvas.draw_idle()

    fig.canvas.mpl_connect("button_press_event",on_click)

    plt.hiển thị()

plot_signals(signals_df)

我已经测试并审查了许多答案和代码，如下所示:

How to add hovering annotations in matplotlib

How to make labels appear when hovering over a point in multiple axis?

¿Es posible que aparezcan etiquetas al pasar el mouse sobre un punto en matplotlib?

Matplotlib Cursor — How to Add a Cursor and Annotate Your Plot

我什至回顾了 mplcursors 模块很长时间，因为它带有一个示例，其中包含与我正在做的类似的步骤图: https://mplcursors.readthedocs.io/en/stable/examples/step.html ，但它给了我相同的结果，我找不到解决方案。

1 Câu trả lời

鼠标悬停在图形数据点上时，使用 Plotly 进行数据注释标签动画

Not to mention a huge slew of other awesome, easy-to-use, widely-compatible JS-interactive graphing capabilities, all free, all in Python. Just install with conda (or pip) no online account required and the plots default to "offline mode" in latest version(s).

所以用plotly，特别是plotly express，很简单!
就轴/数据的细节而言，我不是 100% 想要的，但我认为下面展示了 Plotly 可用于创建交互式图形的极大便利，以及非常强大的自定义功能。
通过粗略阅读 the plotly tài liệu，您可以轻松地将这些交互式图表调整为您想要的目的。 .

And through plotly.express you still have access to the built-in Fig features relevant to all the other submodules, too. So don't overlook those [e.g., the docs link above shows sections specific for subplotting, custom annnotations/hover annotations, custom style formatting, etc., all which still apply to objects within plotly.express!]).

I - 数据结构设置

Identical to yours... Plotly is designed to work with pandas.DataFrames, specifically*.

*_{(Unlike matplotlib — not that it isn't still loved!, just...
    well, it's aging rather poorly let's face it.)}

例如。，

import plotly.express as px
import plotly.graph_objs as go

nhập pandas dưới dạng pd
nhập numpy dưới dạng np

data = {
    "Name": [
        "Lamp_D_Rq", "Status", "Status", "HMI",
        "Lck_D_RqDrv3", "Lck_D_RqDrv3", "Lck_D_RqDrv3",
        "Lck_D_RqDrv3", "Lamp_D_Rq", "Lamp_D_Rq",
        "Lamp_D_Rq", "Lamp_D_Rq",
    ],
    "Value": [0, 4, 4, 2, 1, 1, 2, 2, 1, 1, 3, 3],
    "Gage": [
        "F1", "H1", "H3", "H3", "H3",
        "F1", "H3", "F1", "F1", "H3",
        "F1", "H3",
    ],
    "Id_Par": [0, 0, 0, 11, 0, 0, 0, 0, 0, 0, 0, 0],
}

signals_df = pd.DataFrame(data)

Để ý:然后我跑了 signals_df通过您的绘图功能，并添加 return signals_df获取更新的 df，即:


最终的
Tên
值(value)
量具
Id_Par
数数
子
上一页


0
Lamp_D_Rq
0
F1
0
0
0
0

1
地位
4
H1
0
0
1
0

2
地位
4
H3
0
0
2
0

3
人机界面
2
H3
11
1
2
1

4
Lck_D_RqDrv3
1
H3
0
0
4
0

5
Lck_D_RqDrv3
1
F1
0
0
5
0

6
Lck_D_RqDrv3
2
H3
0
0
6
0

7
Lck_D_RqDrv3
2
F1
0
0
7
0

8
Lamp_D_Rq
1
F1
0
0
8
0

9
Lamp_D_Rq
1
H3
0
0
9
0

10
Lamp_D_Rq
3
F1
0
0
10
0

11
Lamp_D_Rq
3
H3
0
0
11
0

II - 使用 plotly.express 绘制自定义悬停注释(像素)

Here's one relatively (i.e., to mpl) quite simple, possible multi-featured, modern interactive display of your data using Plotly (via điểm ảnh):

fig = px.line(
    signals_df,
    y="Value",
    x="Sub",
    color="Name",
    hover_data=["Gage"],
    custom_data=["Gage"],
    markers=True,
    height=500,
    render_mode="svg")

fig.update_traces(line={"shape": 'hv'})
fig.update_traces(
    hovertemplate="
".join([
        "Gage: %{customdata[0]}",
    ])
)
fig.show(config={'displaylogo': False})

关于python - 单击 matplotlib(或可能是 plotly)中的阶梯图子图点时如何使标 checkout 现？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/69730420/