我如何 plot 数据随时间变化？

Question

I have a csv where I have recorded my calorie intake throughout the day for 7 days.

There are two columns in the csv: time of day and amount of calories

I need to load this data and plot it in a graph. I'm trying to do a line plot where I compare the 7 days to each other on the same graph.

The x ticks range from 0-24 (representing each hour of the day), but I don't know how to plot each recording accordingly to the x ticks. I'm not sure I'm making sense. What I mean is that if I have a recording at 21:30, it should plot between the x ticks, 21 and 22, but I'm not sure how to do that.

Any help is appreciated.

Answer 1

not really sure what you expected from x-axis to be. Let's take the following example:

import pandas
from matplotlib import pyplot as plt

df = pandas.DataFrame({"Time":["07:10", "09:30", "21:30"], "Value": [1000, 1200, 1400]})
plt.plot(df["Time"], df["Value"] ,'ro')
plt.show()

output:

As you can see, it will automatically will plot the x-values (time of day). If you want to be precisely 0-24 with 1 hour jump, I recommend to first convert values to datetime or time objects and work with them, as it easier that way.