Seaborn regression plot with datetime object

Question

I am trying to produce a Regression/Scatterplot with a datetime.time object between the Amplitude of several Nerves and the Time they have been in use in a trial.

>>> df.head()
   Amp strain 8 min [mA] Time in use [hh:mm]
0                    0.1            00:22:00
1                    0.0            00:46:00
2                    0.8            00:18:00
3                    0.3            00:23:00
4                    0.6            00:14:00

However sns.regplot(y=df.iloc[:, 1], x=df.iloc[:, 0]) causes a

TypeError: float() argument must be a string or a number, not 'datetime.time'

I tried everything from here to there and several other links that I can't find anymore but haven't been able to do so. Is there anything I haven't seen yet?

Although that creates an empty figure, the error remains the same — Seneo
– Seneo, Commented Jul 8, 2021 at 23:27

Seneo · Accepted Answer · 2021-07-10 08:21:34Z

0

I solved it by

Code:

df["Time in use [hh:mm]"] = pd.to_numeric(df["Time in use [hh:mm]"].astype(str).str.replace(":", ""))
sns.regplot(y=df["Time in use [hh:mm]"], x=df["Amp strain 8 min [mA]"])

This produces a SettingWithCopyWarning that can be disabled, but I'm not sure if that's advisable.

edited Jul 10, 2021 at 8:21

answered Jul 10, 2021 at 8:11

Seneo

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