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find roots and assign

SOLVED
Level 7

find roots and assign

Hello,

 

I need to find roots of a periodic equation by making initial guesses of x and assign the derived roots in "a". But, Mathcad is saying " the value must be a scalar". What does "scalar" in this case and how can I solve this?  I also need to sort "a" after assigning.

 

Thank you very much,

 

Faisal

1 ACCEPTED SOLUTION

Accepted Solutions

Re: find roots and assign

Its always better to post the worksheet itself rather than just a picture.

How about this approach:

B.png

Worksheet in Format P5 attached

10 REPLIES 10

Re: find roots and assign

Its always better to post the worksheet itself rather than just a picture.

How about this approach:

B.png

Worksheet in Format P5 attached

Re: find roots and assign

I tried it but did not work

Re: find roots and assign

See my approach in the answer above

Re: find roots and assign

Thank you very much for your help. Can you please direct as what does "scalar" and "vector" means in Mathcad language. what I understand is one is in a matrix form and the other isn't. You can also direct me to any previously discussed topic about this.

Re: find roots and assign


@fahmed-2 wrote:

Thank you very much for your help. Can you please direct as what does "scalar" and "vector" means in Mathcad language. what I understand is one is in a matrix form and the other isn't. You can also direct me to any previously discussed topic about this.


A scalar is a simple value, like 15.6.

A vector is a n x 1 matrix, a column vector.

Obviously vector elements are not allowed in the "root" command which made is necessary to create our own "Root" command which does ;-)

 

Re: find roots and assign

Thank you again

Re: find roots and assign

I am very close in getting my solution but I am having an issue. the roots that I am getting has some repetitive and negative roots. My solution only involves positive non-repetitive roots. I have tried this approach but not working. Could please see to it. Thank you. My Mathcad version is 4.0

Re: find roots and assign

This should help:

B.png

Worksheet in Format P4 attached

Re: find roots and assign

Thank you very much, it worked. I truly appreciate your concern and time for this,