Hi,

I am trying to convert a Mathcad 15 sheet, and have a problem with the below equation:

Is there a summation within Smath that will do the second summation?
From the Mathcad help:


Thanks in advance
Ian

Hi. There are not equivalent, but this is how to convert it into usual summation operator.



Best regards.
Alvaro.

Hi,

Still cant get it to work, I will strip out the identifying material and post the worksheet.

Thanks
Ian

Attached is sheet, this is a MRM for beam frequency analysis

natural freq 5 v2 forum.sm (58 KiB) downloaded 47 time(s).

Wrote

Attached is sheet, this is a MRM for beam frequency analysis

Sum over 'n' ... NOT over 'k'
Model summation attached.

Function Running Summation.sm (32 KiB) downloaded 36 time(s).

Wrote

Attached is sheet, this is a MRM for beam frequency analysis

Better to attach the original Mathcad document.

Mathcad sheet attached, striped version
beam frequency test 2.xmcd (171 KiB) downloaded 30 time(s).

Jean, I am at a loss as to which part of your file I should be looking at.

Ian

Hi. As Viacheslav says, it's better in this case the mathcad file. Just a couple of notes.

You use a for loop with i as counter. Thus, at the exit, i equals the last count value, not the entire range. So, or you redefine i as range, or use this way for not changing i value



Actually, SMath doesn't have "range" variables, it only have scalars and matrices. But mathcad have "true" range variables, which it's more a complication than an adventage. BTW in SMath you can't use a range variable in the same way, and sometimes needs some dummy variable for detect them



Finally, remember that in mathcad sqrt(-1) is 1i, but in SMath it is just i, so using is as counter you loose all the complex algebra.

Bests regards.
Alvaro.

Wrote

Jean, I am at a loss as to which part of your file I should be looking at.

It just shows how to run summation wrt several dependent functions.

Hi Alvaro,

Some interesting hints there. I imagine its also the same going the other way.

Hi Jean,

OK, now I understand, just some pointers for me

Thanks
Ian

Wrote

Hi Jean,
OK, now I understand, just some pointers for me
Thanks
Ian

The A,B are numerical two vectors of coefficients.
Then introduced in the scalar function wrt sin/cos.

Wrote

I am trying to convert a Mathcad 15 sheet, and have a problem with the below equation:

I think that there should be such a replacement.

File not found. File not found.

You can use debugging in both programs to check that the functions are working correctly.

Hi,

Thanks for the pointers, will revisit tomorrow

Ian