Data Visualisation Questions Long
Data visualization is the graphical representation of data to provide insights, patterns, and trends. There are various types of charts and graphs used in data visualization, each serving a specific purpose. Some of the commonly used types of charts and graphs are:
1. Bar Chart: A bar chart represents data using rectangular bars of varying lengths. It is useful for comparing discrete categories or showing changes over time.
2. Line Chart: A line chart displays data points connected by lines. It is effective for showing trends and patterns over time or continuous data.
3. Pie Chart: A pie chart represents data as a circle divided into slices, where each slice represents a proportion of the whole. It is suitable for displaying the composition or distribution of categorical data.
4. Scatter Plot: A scatter plot uses dots to represent individual data points on a two-dimensional plane. It is useful for visualizing the relationship between two continuous variables and identifying correlations.
5. Area Chart: An area chart is similar to a line chart but with the area below the line filled with color. It is effective for showing cumulative data or comparing multiple categories over time.
6. Histogram: A histogram displays the distribution of continuous data by dividing it into bins and representing the frequency or count of data points within each bin. It is useful for understanding the shape and spread of data.
7. Heatmap: A heatmap uses color to represent the magnitude of values in a matrix or table. It is suitable for visualizing patterns and relationships in large datasets.
8. Box Plot: A box plot, also known as a box-and-whisker plot, displays the distribution of data through quartiles, outliers, and median. It is useful for comparing multiple groups or variables.
9. Treemap: A treemap represents hierarchical data using nested rectangles, where the size and color of each rectangle indicate different attributes. It is effective for visualizing hierarchical structures and proportions.
10. Gantt Chart: A Gantt chart displays a project schedule or timeline, showing tasks, their durations, and dependencies. It is useful for project management and planning.
These are just a few examples of the many types of charts and graphs used in data visualization. The choice of chart or graph depends on the nature of the data, the purpose of visualization, and the insights you want to convey.