Long Run Markov Chain Calculator

Analyze steady behavior across states using transition probabilities. Test matrices, compare outcomes, and examine convergence. Download reports and charts for faster statistical interpretation workflows.

Calculator

Enter the number of states, labels, initial distribution, and transition probabilities. Each row must sum to 1.

Live row sums help confirm that every row remains a valid probability distribution.

Example Data Table

This example models three weather states and their transition behavior.

From \ To Sunny Cloudy Rainy Row Sum
Sunny 0.70 0.20 0.10 1.00
Cloudy 0.30 0.40 0.30 1.00
Rainy 0.20 0.30 0.50 1.00

Initial distribution: [0.50, 0.30, 0.20]

Use the example button above to load this matrix into the calculator instantly.

Formula Used

A Markov chain transition matrix is written as P. The long run distribution is the stationary vector π, where:

πP = π and Σπi = 1

The calculator solves that stationary system and also tests convergence through repeated multiplication. Starting from an initial distribution x0, the step distribution becomes:

xn = x0Pn

When repeated transitions stabilize, the chain approaches the same long run probability pattern. The recurrence estimate for a state uses 1 / πi.

How to Use This Calculator

  1. Choose the number of states in your chain.
  2. Enter short state labels separated by commas.
  3. Provide an initial distribution matching the state count.
  4. Fill the transition matrix so each row sums to 1.
  5. Set preview steps, tolerance, and maximum iterations.
  6. Click the calculate button to generate long run results.
  7. Review the stationary table, step preview, and chart.
  8. Download the output as CSV or PDF when needed.

Frequently Asked Questions

1. What does the long run distribution mean?

It shows the proportion of time the chain spends in each state after many transitions. It summarizes the chain’s steady behavior rather than one short sequence.

2. Why must each row sum to 1?

Each row lists the probabilities of moving from one state to every possible next state. Those outcomes must cover all possibilities, so the total probability equals 1.

3. What is a stationary distribution?

It is a probability vector that remains unchanged after multiplication by the transition matrix. In symbols, it satisfies πP = π.

4. Does every Markov chain have one long run answer?

Not always. Some chains are periodic or reducible. In those cases, steady convergence can fail or depend on the starting distribution.

5. What does the preview step distribution show?

It shows the distribution after a chosen number of transitions. This helps compare short term behavior against the estimated long run distribution.

6. Why include tolerance and maximum iterations?

Tolerance defines how close two consecutive distributions must be. Maximum iterations prevents endless looping when stabilization is slow or absent.

7. What is mean recurrence time?

For a positive stationary probability, it estimates the average number of steps needed to return to that state. It is computed as 1 / πi.

8. Can I use this for more than three states?

Yes. This page supports between two and six states. Larger state spaces are possible, but they usually need a bigger custom interface.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.