Data Table Alternative

Ray_Gianantoni 

Certainly! It sounds like you want to convert your Excel worksheet, which currently uses Data Tables and Macros, into a web page. Since the vendor's software cannot handle Data Tables or Macros, you'll need to find a way to achieve similar functionality using mathematical formulas that can be implemented on a web page.

Here's a high-level approach to convert your Excel worksheet into a web-based solution:

1. Understand the Logic:

   • Identify the logic behind your Excel calculations. Understand how the random interest rates, systematic withdrawal, and the Data Table contribute to the final results.

2. Use JavaScript for Web Calculations:

   • You can write JavaScript functions to replicate the calculations you were performing in Excel.

3. Random Number Generation:

   • Use JavaScript's built-in Math.random() function to generate random interest rates.

4. Systematic Withdrawal Calculation:

   • Write a JavaScript function to calculate the systematic withdrawal based on your original logic.

5. Loop for Multiple Scenarios:

   • Implement a loop in JavaScript to run through the desired number of scenarios (1,000 in your case). For each iteration, generate random interest rates, calculate systematic withdrawals, and store the results.

6. Determine Percentage of Positive Ending Values:

   • Analyze the results obtained from the loop to determine the percentage of positive ending values. You can do this by counting the number of positive outcomes and dividing by the total number of scenarios.

7. HTML and CSS for Web Page Structure:

   • Use HTML to structure your web page and CSS for styling. This is where you'll create input fields for user input and areas to display the results.

8. Implement User Interface (Optional):

   • If you want a user-friendly interface, consider using JavaScript libraries or frameworks (e.g., React, Angular, Vue.js) to create a dynamic interface that allows users to input parameters and see results in real-time.

9. Host the Web Page:

   • Once you've developed the web page, you can host it on a web server or use platforms like GitHub Pages for free hosting.

Online Calculator Link: SWP Systematic Withdrawal plan Calculator

Remember, this is a broad overview, and the actual implementation will depend on the complexity of your calculations and the specific requirements of your project. If you need help with specific code snippets or have more detailed questions, feel free to ask!

Ray_Gianantoni 

You can use the Excel formula "FV" (Future Value) within a formula to calculate the ending value for each simulation, as I described in my previous answer. Here is an example formula that uses the FV formula within it:

=SUM(IF(FV(A2/12,B2*12,-C2,-D2:D2)>0,1,0))/B2

This formula assumes that your simulation data is in columns A to D, with the interest rate in column A, the number of years in column B, the systematic withdrawal amount in column C, and the initial investment amount in column D.

By using this method, you can achieve the same result as with the data table, but without using macros or any special Excel features that may not be supported by your vendor's software.

Here's how the formula works:

• FV(A2/12,B2*12,-C2,-D2:D2) calculates the ending value for each simulation using the interest rate, number of years, systematic withdrawal amount, and initial investment amount.
• The IF function checks whether the ending value for each simulation is greater than zero (i.e., positive), and returns a 1 if it is, or a 0 if it is not.
• The SUM function adds up the 1s and 0s from the IF function to count the number of positive ending values.

• The final division by B2 calculates the percentage of positive ending values, where B2 is the total number of simulations.

This formula should give you the same result as using a data table to simulate 1,000 different ending values.

Additional Link: SWP Calculator - Systematic Withdrawal Plan Calculator

Hope I could help you with that!