Trends, Correlations and Outliers
Data visualisation is very much a mathematical endeavour as it is a design one. It is important to analyse the data you have collected in order to find anything interesting which a data visualisation would serve the purpose of explaining this in a visual and easy to understand way.
Quantitative
Data that can be counted or measured; all values are numerical.
Discrete
Numerical data that has a nite number of possible values. Example: Number of employees in the office.
Continuous
Data that is measured and has a value within a range. Example: Rain fall within a year.
Categorical
Data that can be sorted according to group or category. Example: Types of products sold.