Trial and error

[kshaikh]

Hi,

I am trying to get a solution in mathcad in which we provide a specific value (say 0) initially followed by set of equations and finally giving result.

But if the result obtained is <> zero, program will automatically change the initial value until we get the final result (by trial and error) as or nearly zero.

this is one example.

Please help me solve this using Mathcad.

Thanks.

[RichardJ]

Please post the worksheet (click on "use advanced editor" at the top right of the edit dialog)

[StuartBruff]

Khalid Shaikh wrote:

Hi,

I am trying to get a solution in mathcad in which we provide a specific value (say 0) initially followed by set of equations and finally giving result.

But if the result obtained is <> zero, program will automatically change the initial value until we get the final result (by trial and error) as or nearly zero.

this is one example.

....

There are several methods of doing this in Mathcad.  For example:

1.  Rewrite your expressions as a program and then write a standard divide-and-conquer algorithm to change x such that Eq gets nearer to 0.

2.  Rewrite your expressions as a function and use the function Root to find the zeros.

3. Write a Solve Block around your expressions and use Find to look for an exact solution.  Use Minerr if Find fails to get an exact solution.

eg:  Solve Block to find square root of 9, given an initial guess of 9.

As Richard says, please post your worksheet ... nobody will want to retype all your work! 🙂   Plus there are a few values you havent' specified (eg, E) and it's also often a lot easier to diagnose problems from the worksheet than by looking at a picture.

Stuart

[kshaikh]

Hi All,

please find attached MATHCAD file.

Thank you.

[RichardJ · Accepted solution]

Change your variables to functions of x, and then use a solve block to find the values of x for which Eq=0

[kshaikh]

Thank you sir,

Wouldn't have been possible without your help

Regards,

Khalid Shaikh