Asammdf：重命名频道组

编程问答 2022-04-30

问题描述

我正在使用 asammdf 绘制信号，但现在我遇到了一个问题，如何使用信号名称重命名通道组？

这是我的代码：

mdf = MDF()
sigs = []
for equipment in table_list:
    print("Table name:",equipment[0])
    df = pd.read_sql_query('select * from ' + equipment[0],con)
    df = df.replace(np.nan,0)
    if equipment[0] == 'state':
        df_time = (df['id']-df.iloc[0]['id'])
    else:
        df_time = (df['ts']-df.iloc[0]['ts']) * 1e-6
        df.pop('ts')
    sigs = []
    for signal in df.columns.to_list():
        df[signal]
        test_signal = Signal(samples=df[signal],timestamps=df_time,name=signal,unit='')
        sigs.append(test_signal)
    mdf.append(sigs)
mdf.save('..\\Output\\test_complete.mf4',overwrite=True)

enter image description here

解决方法

您应该更改频道组评论

mdf = MDF()
sigs = []
for equipment in table_list:
    print("Table name:",equipment[0])
    df = pd.read_sql_query('select * from ' + equipment[0],con)
    df = df.replace(np.nan,0)
    if equipment[0] == 'state':
        df_time = (df['id']-df.iloc[0]['id'])
    else:
        df_time = (df['ts']-df.iloc[0]['ts']) * 1e-6
        df.pop('ts')
    sigs = []
    for signal in df.columns.to_list():
        df[signal]
        test_signal = Signal(samples=df[signal],timestamps=df_time,name=signal,unit='')
        sigs.append(test_signal)
    mdf.append(sigs)
    channel_group = mdf.groups[-1].channel_group
    channel_group.comment = "fancy name"
mdf.save('..\\Output\\test_complete.mf4',overwrite=True)
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