topic Re: Trial and error in Mathcad

Trial and error

kshaikh — Thu, 03 May 2018 15:06:00 GMT

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

Re: Trial and error

RichardJ — Sun, 27 Sep 2015 14:35:03 GMT

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

Re: Trial and error

StuartBruff — Sun, 27 Sep 2015 14:42:13 GMT

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

Re: Trial and error

kshaikh — Mon, 28 Sep 2015 13:31:24 GMT

Hi All,

please find attached MATHCAD file.

Thank you.

Re: Trial and error

RichardJ — Mon, 28 Sep 2015 14:13:26 GMT

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

Re: Trial and error

kshaikh — Mon, 28 Sep 2015 14:49:10 GMT

Thank you sir,

Wouldn't have been possible without your help

Regards,

Khalid Shaikh