What is it?
A bar chart is a graphical method of showing the difference between various discrete categories of data.
A histogram is used to show how data is spread across a continuous range of values.
When to use it
- Gathering data
- Analysing data
- implementing and testing solutions
What does it achieve?
The bar chart shows a comparison between different categories. The histogram is used when data is spread across a continuous range of values.
Summary
- In a standard bar chart items are valued from high to low
- A deviation bar chart illustrated negative and positive values
- A range bar chart can show the spread between high and low amounts
- A sliding bar chart is used when there are only two groups of data
- A 100% bar chart has all its bars equal length and divided according to the size of its components
- A grouped bar chart can be used to display two different points in time
- An overlap bar chart can be used to highlight further, two different points in time
- The histogram is used to show data over a continuous range of values