RK4 (Runge-Kutta 4th order ) Using Calculator

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PA3040D

Junior Member
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Jan 30, 2021
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91
Dear all,

I am not sure if this question is relevant for this group, but it pertains to mathematics and calculations. I entered the following function into my calculator, but when I press the CALC button, it requests enter the value for X, A, and B, but not for Y. I am using calculator for the RK4 (Runge-Kutta 4th order ) method. If anyone has experience with this, could you please assist?

If I published wrong post on this group please apologize and erase the post

My calculator is a Casio FX 991 EX.

I have Casio Simulator so it is working fine

Thank you

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I have used the RK4 method before for approximating the solution of first order differential equations, but I have never used a calculator. Probably, you wanna use a calculator to check if your solution agrees with the actual solution which I think that it is very important after these cumbersome calculations. I used to compare my solution with the solution at the back of the book for odd answers and it was fair enough to master the method accurately.

It is rare to find someone who has used this method in a calculator, but I have some advices for you to check your solution.

1. Of course, the first advice to check it with an online calculator.

2. If an online calculator is boring, you can always make your own calculator by learning the basics of any programming language.

3. You can always use the odd answers at the back of the book which is a very useful reference.

4. If all of these three advices above are boring, you can always share your RK4 method solution in this forum. I know that it is cumbersome, but I am one of the few students who is very interested in approximation methods. Not only approximations for those differential equations, but also for other things. I will be so glad to help you in that.
 
mario99 said:
I have used the RK4 method before for approximating the solution of first order differential equations, but I have never used a calculator. Probably, you wanna use a calculator to check if your solution agrees with the actual solution which I think that it is very important after these cumbersome calculations. I used to compare my solution with the solution at the back of the book for odd answers and it was fair enough to master the method accurately.

It is rare to find someone who has used this method in a calculator, but I have some advices for you to check your solution.

1. Of course, the first advice to check it with an online calculator.

2. If an online calculator is boring, you can always make your own calculator by learning the basics of any programming language.

3. You can always use the odd answers at the back of the book which is a very useful reference.

4. If all of these three advices above are boring, you can always share your RK4 method solution in this forum. I know that it is cumbersome, but I am one of the few students who is very interested in approximation methods. Not only approximations for those differential equations, but also for other things. I will be so glad to help you in that.
Click to expand...

This forum is a great resource where many people help each other, especially you, who have replied to me the most. I really appreciate it and want to express my great thanks again and again. I want to practice this method, as it helps me improve myself. However, I want to point out that during exam times, I aim to minimize the time spent, so I have decided to use a calculator to reduce the amount of time needed during the exam

Anyway, I wanted to double-check if my calculator has a bug.
 
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