Rank: Advanced Member Groups: Registered
Joined: 18/12/2014(UTC) Posts: 38
|
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
|
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 28/08/2014(UTC) Posts: 1,356 Was thanked: 815 time(s) in 516 post(s)
|
Hi. There are not equivalent, but this is how to convert it into usual summation operator. Best regards. Alvaro.
|
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 18/12/2014(UTC) Posts: 38
|
Hi,
Still cant get it to work, I will strip out the identifying material and post the worksheet.
Thanks Ian
|
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 18/12/2014(UTC) Posts: 38
|
|
|
|
|
Rank: Guest
Groups: Registered
Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 981 time(s) in 809 post(s)
|
Originally Posted by: ianlh Attached is sheet, this is a MRM for beam frequency analysis Sum over 'n' ... NOT over 'k' Model summation attached. Function Running Summation.sm (33kb) downloaded 10 time(s).
|
|
|
|
Rank: Advanced Member Groups: Registered, Advanced Member Joined: 10/11/2010(UTC) Posts: 1,494 Was thanked: 1274 time(s) in 745 post(s)
|
Originally Posted by: ianlh Attached is sheet, this is a MRM for beam frequency analysis Better to attach the original Mathcad document. |
Russia ☭ forever Viacheslav N. Mezentsev |
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 18/12/2014(UTC) Posts: 38
|
Mathcad sheet attached, striped version beam frequency test 2.xmcd (172kb) downloaded 10 time(s).Jean, I am at a loss as to which part of your file I should be looking at. Ian
|
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 28/08/2014(UTC) Posts: 1,356 Was thanked: 815 time(s) in 516 post(s)
|
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.
|
|
|
|
Rank: Guest
Groups: Registered
Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 981 time(s) in 809 post(s)
|
Originally Posted by: ianlh 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.
|
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 18/12/2014(UTC) Posts: 38
|
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
|
|
|
|
Rank: Guest
Groups: Registered
Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 981 time(s) in 809 post(s)
|
Originally Posted by: ianlh 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.
|
|
|
|
Rank: Advanced Member Groups: Registered, Advanced Member Joined: 10/11/2010(UTC) Posts: 1,494 Was thanked: 1274 time(s) in 745 post(s)
|
Originally Posted by: ianlh 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. |
Russia ☭ forever Viacheslav N. Mezentsev |
|
|
|
Rank: Advanced Member Groups: Registered, Advanced Member Joined: 10/11/2010(UTC) Posts: 1,494 Was thanked: 1274 time(s) in 745 post(s)
|
You can use debugging in both programs to check that the functions are working correctly. |
Russia ☭ forever Viacheslav N. Mezentsev |
|
|
|
Rank: Advanced Member Groups: Registered
Joined: 18/12/2014(UTC) Posts: 38
|
Hi,
Thanks for the pointers, will revisit tomorrow
Ian
|
|
|
|
Forum Jump
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.