Iterative Proportional Fitting Calculator

Expert Guide to Iterative Proportional Fitting

Introduction & Importance

Iterative proportional fitting, also known as raking or raking ratio, is a statistical method used to adjust categorical data to match known marginal totals…

How to Use This Calculator

1. Enter your matrix data in the ‘Matrix’ field.
2. Enter your vector data in the ‘Vector’ field.
3. Specify the number of iterations in the ‘Iterations’ field.
4. Click the ‘Calculate’ button.

Formula & Methodology

The iterative proportional fitting procedure works by adjusting the cells of a contingency table to match the known marginal totals…

Real-World Examples

Case Study 1

Suppose we have a matrix representing the ages and genders of 100 people…

Data & Statistics

Initial Matrix

Age	Male	Female	Total
18-25	20	15	35

Adjusted Matrix

Age	Male	Female	Total
18-25	22	13	35

Expert Tips

• Always ensure your initial matrix and vector data are correct.
• Be mindful of the number of iterations you choose.
• Consider the stability of your data when using this method.

Interactive FAQ

What is iterative proportional fitting?

Iterative proportional fitting is a statistical method…

For more information, see the U.S. Census Bureau’s guide to iterative proportional fitting and the UK Office for National Statistics’ guide.