Basic Data Visualization

Data visualization is the presentation of data in a graphical or visual form which sums up the data in simple charts in order to help the decision makers make the best decisions by providing helpful insights and patterns.

Here are some useful basic data visualization:

1- Bar chart(bar graph):

It presents discrete categorical data with rectangular bars with heights or lengths proportional to the values that they represent. It can presented vertically or horizontally, one axis represent the categories and the other axis represent a measured value.

Example of a bar chart:

2- Histogram:

It present the distribution of numerical data , it’s similar to bar chart but a histogram groups numbers into ranges for one variable.

Example of a histogram:

3- Scatter plot:

It represent the values of two variables as a collection of points, the value of one variable represent it’s position in the horizontal axis and the value of the other value represent it’s position in the vertical axis.

Example of a scatter plot:

4- Heat map:

It represent the values of the data in colors, It’s very useful for correlation.

Example of a correlation heat map: