Errorbar

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##### Question

I'm not able to understand the use of error bar. Can you please elaborate?

Python-3.4.3 Plotting-Data 05-06 min 0-10 sec

__Answers:__

Error Bars

Matplotlib line plots and bar charts can include error bars. Error bars are useful to problem solvers because error bars show the confidence or precision in a set of measurements or calculated values. Bar charts without error bars give the illusion that a measured or calculated value is known to high precision or high confidence.

A Basic errorbar can be created with a single Matplotlib function call:

%matplotlib inline

import matplotlib.pyplot as plt

plt.style.use('seaborn-whitegrid')

import numpy as np

x = np.linspace(0, 10, 50)

dy = 0.8

y = np.sin(x) + dy * np.random.randn(50)

plt.errorbar(x, y, yerr=dy, fmt='.k');

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