Ympyräkaavio

Ympyräkaavio, also known as a circle diagram or circle chart, is a type of graphical representation used to show how different data categories contribute to a whole. It is a circle divided into segments, where each segment represents a category and its corresponding size relative to the whole is shown.

The concept of ympyräkaavio was first introduced by Finnish statistician Ragnar Frisch in the 1930s. However, the term "ympyräkaavio" was popularized in Finland during the 1950s and 1960s, especially in the field of economics.

A ympyräkaavio typically consists of a circular chart with equal areas representing different data categories. Each segment is divided into additional sections, often using colors or patterns to distinguish between them. The size of each segment is proportional to the corresponding data value, allowing for easy comparison of different categories.

Ympyräkaavio is commonly used in statistics, economics, and marketing to visualize and analyze data. It is particularly useful for showing how different components contribute to a whole, or for comparing parts to the total. The transparent and easy-to-understand nature of ympyräkaavio makes it a popular choice for various types of data.

Despite its widespread use, the ympyräkaavio has relatively little attention in the scientific literature compared to other chart types such as bar charts or column charts.