Setting xlim() removes the xticks

Question

I am trying to plot 3 lines in matplotlib but whenever I add the xlim([]) the line disappears.

Without xlim:

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
from matplotlib.lines import Line2D 

df.iloc[3:6,5:].T.plot()

with xlim:

df.iloc[3:6,5:].T.plot()
plt.xlim([410,1004])

I have made sure that the column I plot are astype float, so what could be the reason for this?

@JohanC then why when it has no xlim argument is does plot it? and also I have cganed it to flaot and checked with dypes, it is float — Reut, Sep 16 '20 at 06:23

score 1 · Accepted Answer · answered Sep 16 '20 at 06:47

I found the problem: the labels of the X axis were string.

I have changed them using the following finction from here: Python - How to convert only numbers in a mixed list into float?

cols=df.columns.tolist()

def maybe_float(s):
    try:
        return float(s)
    except (ValueError, TypeError):
        return s
cols1=[maybe_float(v) for v in cols]
df.columns=cols1

After that it worked

Setting xlim() removes the xticks

1 Answers1