equation

[kakomoji323]

hello everyone I try to use help quick sheets and I wrote the following eq but I get the red line almost for all the results and I do exactly step by step im sure there is something missing here but I can not find it could you check it out and let me know what's is the problem 

plz check the attachment

[PTCModerator]

Hello @kakomoji323 

What product is this in reference to? 

Thank you,

PTCModerator

[LucMeekes · Accepted solution]

Please attach your worksheet containing the equation.

Success!
Luc

[kakomoji323]

thank you for response I figured out , and I wrote it down,  my question is ,  how this output plot change depend on R value,  I  mean I would like  to add   variable value of R from 0.1 to 5 ohm  . in attached file r is fixed but I want make a loop with 5 different value of R  .

thank you in advance 

[VladimirN]

See this discussion: https://community.ptc.com/t5/PTC-Mathcad/Plotting-a-family-of-curves/m-p/43766

[kakomoji323]

hank you for help but I could not find my answer , I need to find the out put with 4 different value of R I already made a R vector BUT I could not find solution 

[kakomoji323]

thank you for response I figured out , and I wrote it down,  my question is ,  how this output plot change depend on R value,  I  mean I would like  to add   variable value of R from 0.1 to 5 ohm   I attached the file . 

thank you in advance 

[Werner_E]

You will have to turn all constants which depend on R into functions of R and add R as additional argument to your existing functions.

I show it here for the first few expressions

[kakomoji323]

I applied all the change you said and simplified the eq please check the plot . I made a R vector and it applied to all equation but as you see in picture it make no sense to me I need to show how I(current ) change due to different R, for that I need a 3 value plot which show G,I,R  I tried 3d plot but it said value not defined could you explain how to make it

[LucMeekes]

You did NOT apply all necessary changes.

What you show here is I's only dependent on phi, not on R.

From your remark I understand that you essentially need a 3-d plot. In that case follow my example of this thread: https://community.ptc.com/t5/PTC-Mathcad/equation/td-p/631776

Success!
Luc

[kakomoji323]

this is almost the same eq that I post with some change it end up like that I used you example to write R vector but how to use G plot depend on fi and R  I don't understand. please check the attachment there is 6 equations and I cant not apply those change to all of them  

[Fred_Kohlhepp]

"there is 6 equations and I cant not apply those change to all of them "

Unfortunately, sometimes, to make the changes we need to requires a lot of modifying.  Mathcad (15 and before) had a very robust and extremely useful "Find and replace," function for these kinds of changes.  The one available in Prime is woefully underpowered and inadequate for the task.

Sorry!  Start editing.

[kakomoji323]

I don't know how to apply to all equation I've try as you said but not working 

[LucMeekes]

Attach your worksheet, saved as a Mathcad 11 .MCD file and I'll see if I can help you.

Success!
Luc

[kakomoji323]

here you are I really appreciate you help

[Werner_E]

See if the attached file helps

[kakomoji323]

I really appreciate this. thank you so much , I do my best to learn Mathcad , every example you guys give I learn something new.

[LucMeekes]

Nice!

...' irritation loop '...

well chosen designation, or typo?

Luc

[Werner_E]

---

@LucMeekes wrote:

Nice!

...' irritation loop '...

well chosen designation, or typo?

Luc

---

It should read "irritating loop", but 'irritation loop' is not so far away from what I had in mind 😉

Actually I am famous for my typos 😉

[LucMeekes]

Oh, and I thought you had meant to write:

'iteration loop'

😲

[LucMeekes]

There are two remarks to be made regarding the definition of the function G(phi):

There is a FOR loop that uses loop variable n, but n is not used further in the function.

There is a number of IF statements, covering the range 0 to 2pi, but what if phi is <0 or > 2pi...? You need  an OTHERWISE.

Success!
Luc

Once more. Here's an example for a (plot of) a function of two variables:

[kakomoji323]

luc thank you with response , IF function I use because each I (current ) has specific interval for example I2 FROM PI/3 TO 2PI/3  only that means each I has own phi just I need to  check and study how R can effect current in equation