CODEWITHSUNDEEP
pythonmatplotlib
Joey
Joey

Reputation: 934

Matplotlib axis tickmarker alteration

I have the following code that simply imports temperature data, assigns variables and plots 3 lines on the same figure. However, the x-axis values are in milliseconds (undesirable) and I would like to convert them to hours... any idea how to do this? Here is my code: 

def plot_temp(file_name, name):

    df = pd.DataFrame.from_csv(file_name, index_col = None)

    w = df['Time']
    x = df['Input 1']
    y = df['Input 2']
    z = df['Input 3']

    figsize(6,4)
    plot(w,x, label = "Top_sensor")
    plot(w,y, label = "Mid_sensor")
    plot(w,z, label = 'Bot_sensor')
    title('Temperature log' + name)
    xlabel('Time(ms)')
    ylabel('Temperature (K)')
    legend()

Upvotes: 0

Views: 70

Answers (1)

Simon Gibbons
Simon Gibbons

Reputation: 7194

Converting to Hours

The easiest way of doing this would be to convert the array w to hours before plotting it.

Just take

w = df['Time']
w /= 3600000 # Convert milliseconds to hours

Changing the initial time

To change the initial time of the xaxis to a certain value (say 12 hours) then you could do:

initial_time = 12.0
w += initial_time - min(w)

Upvotes: 2

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