Histogram Maker
A histogram is a graphical representation of the distribution of numerical data. It groups data into bins or intervals and displays the frequency of observations in each bin as bars. Unlike bar charts, histograms have no gaps between bars (unless there are no values in a particular bin).
What is a Histogram?
A histogram is similar to a bar chart but is used specifically for continuous numerical data. The horizontal axis (X-axis) represents the range of values divided into intervals called "bins," while the vertical axis (Y-axis) shows how many data points fall into each bin (frequency).
When to Use a Histogram
- To visualize the distribution of a single continuous variable
- To identify the shape of data distribution (normal, skewed, bimodal, etc.)
- To detect outliers or unusual patterns in your data
- To assess whether data follows a normal distribution
- To compare distributions between different groups
Key Features
- Auto-calculate bins: Automatically determines optimal bin count using Sturges' formula
- Custom bin count: Manually specify the number of bins you want
- Interactive controls: Toggle labels, adjust appearance
- Download: Save your histogram as a PNG image
Interpreting Histograms
- Symmetry: A symmetric bell shape suggests normal distribution
- Skewness: A tail extending to the right indicates positive skew; to the left indicates negative skew
- Modality: One peak is unimodal, two peaks is bimodal, etc.
- Outliers: Data points far from the main cluster may appear as isolated bars