In this article, we explore practical techniques that are extremely useful in your initial data analysis and plotting.Content What is a histogram How to plot a basic histogram in python Histogram grouped by categories in same plot Histogram grouped by categories in separate subplots Seaborn Histogram and Density Curve on the same plot Histogram and Density Curve in Facets Difference between a Histogram and a Bar Chart Practice Exercise Conclusion 1.What is a Histogram A histogram is a plot of the frequency distribution of numeric array by splitting it to small equal-sized bins.
If you want to mathemetically split a given array to bins and frequencies, use the numpy histogram() method and pretty print it like below. It required the array as the required input and you can specify the number of bins needed. This can be useful if you want to compare the distribution of a continuous variable grouped by different categories. But since, the number of datapoints are more for Ideal cut, the it is more dominant. By doing this the total area under each distribution becomes 1. Histogram grouped by categories in separate subplots The histograms can be created as facets using the plt.subplots() Below I draw one histogram of diamond depth for each category of diamond cut. Seaborn Histogram and Density Curve on the same plot If you wish to have both the histogram and densities in the same plot, the seaborn package (imported as sns ) allows you to do that via the distplot(). Since seaborn is built on top of matplotlib, you can use the sns and plt one after the other. Python Plotting Numpy How To Draw TheHistogram and Density Curve in Facets The below example shows how to draw the histogram and densities ( distplot ) in facets. Difference between a Histogram and a Bar Chart A histogram is drawn on large arrays. It computes the frequency distribution on an array and makes a histogram out of it. On the other hand, a bar chart is used when you have both X and Y given and there are limited number of data points that can be shown as bars. You might be interested in the matplotlib tutorial, top 50 matplotlib plots, and other plotting tutorials. Theme by Superb WordPress Themes Home Contact Us Privacy Policy About Selva Terms and Conditions.
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