条形 plot 与 x 轴上的时间

Question

I have a pandas dataframe (filtered_4_6) from which i extract the occurance of event on an hourly basis with the following code:

Filtered_time = filtered_4_6['Date'].dt.time.value_counts()

this gives me 24 rows with time in the first column and number of event on the second. i want to bar plot these 24 bars but can't seem to find how to use the time column as x axis

the result looks like this:

i've tried different ideas but none works:

plt.bar(Filtered_time.index, Filtered_time.values)

it is certainly a format conversion error, but i can't figure it out.

i've tried to make Filtered_time a dataframe

Filtered_time = pd.DataFrame(filtered_4_6['Date'].dt.time.value_counts())

but still get an error

TypeError: the dtypes of parameters x (object) and width (float64) are incompatible

Answer 1

Try plotting with the strings instead:

filtered_time = filtered_4_6['Date'].dt.strftime('%H:%M:%S').value_counts()
filtered_time.plot()