Data Visualization

Data Visualization

• graphical representation of data

• techniques used to communicate insights from data through visual representation.

• to distill large datasets into visual graphics to allow for easy understanding of complex relationships within the data

• to analyze massive amounts of informationand make data-driven decisions.

Common Visualization Techniques

• Bar Graph

• Line Graph

• Pie Graph

• Histogram

• Scatterplot

• Boxplot

• Heatmap

Bar Graph

to compare counts, percentage, or other measures (average) for different discrete categories of data

Line Graph

to observe trend

Pie Graph

shows the relative contribution that different categories contribute to an overall total

Histogram

- the frequency distribution of continuous attribute

Bar graph presents categorical attribute while histogram represents

numerical attribute

Scatterplot

- plots two numerical attributes

Boxplots

graphical representation of the quartiles

Heat maps

- a graphical representation of data where the individual values contained in a matrix (map) are represented as colors.