Solving Gas Dynamics Equation with Secant Method - Troubleshooting Float Error

[trish129]

please help mee remove this error

i coded a secantt method ..the function was a gas dynamics equation.on executing it is giving me an error:float error...

i have attached both the question and the code..

thank u..

 

[fahad20]

please help me correct this error in fortran

hey i coded secant method in fortran ...the equation was quite big and diffocult to put in..someow managed to do it..but on execution it is giving errors..please can you correct the mistake..thank you..would be a great learning for you...

heres the file containing the image of the equation and the fortran code..

erro:math erorr..floating error..

where am i wrong in the code

 

[Mark44]

Where you think you are defining a function, you are actually attempting to assign values an array that you haven't declared.

!C     DEFINE FUNCTION F
      F(M_20)=10-(6**(1/2))*(atan((((M_20)**2)-1)/6)**(1/2))-((atan((((m_1)**2)-1)/6)**(1/2)))+(atan((((M_20)**2)-

1)**(1/2))-(atan((((m_1)**2)-1)**(1/2))))

Here's a link to a topic on Fortran functions and subroutines: http://www.livephysics.com/computational-physics/fortran/fortran-subroutines-and-functions.html

 

[berkeman]

i coded a secantt method ..the function was a gas dynamics equation.on executing it is giving me an error:float error...

i have attached both the question and the code..

thank u..

hey i coded secant method in fortran ...the equation was quite big and diffocult to put in..someow managed to do it..but on execution it is giving errors..please can you correct the mistake..thank you..would be a great learning for you...

heres the file containing the image of the equation and the fortran code..

erro:math erorr..floating error..

where am i wrong in the code

How is it that you both independently coded up this problem, and have exactly the same document? :grumpy:

 

[LudusRex]

I understand the frustration of encountering errors in our calculations. In this case, the float error is most likely due to the limitations of floating-point numbers in computer calculations. This means that the numbers involved in your gas dynamics equation are too large or too small to be accurately represented in the computer's memory.

To troubleshoot this issue, there are a few things you can try. First, check the values of your variables and make sure they are within the range of floating-point numbers. If they are not, you may need to use a different data type or scaling factor to handle the values.

Another solution is to use a library or package that supports arbitrary-precision arithmetic, which can handle larger numbers with more precision. This will require some modifications to your code, but it may be worth considering if your gas dynamics equation involves very large or small numbers.

You can also try increasing the precision of your floating-point numbers by using double or long double instead of float. This can help reduce the error, but it may not completely eliminate it.

Finally, it is important to carefully check your code for any potential errors or bugs that may be causing the float error. Double-check your equations and make sure they are correct, and also check for any potential division by zero or other mathematical errors.

I hope these suggestions help you in troubleshooting the float error in your code. Remember to always double-check your calculations and consider using alternative methods or data types if necessary. Good luck with your research!