topic Re: Vector or for loop? in Mathcad

Vector or for loop?

LN_9876459 — Mon, 22 Mar 2021 12:16:19 GMT

Help a Mathcad-beginner out!

I have programmed a design-model for bending of one single cross-section for a floor slab. I want to optimize this calculation-model to be able to calculate for several cross-sectional dimensions. My first idea was to vectorize the different values, but it wasn't as easy as i thought because of several dimension-errors.

What is the best solution to be able to compute this for all different combinations of cross-sectional dimensions (hw,bw,hf)?

Regards,
Lisa (Mathcad prime 6)

Re: Vector or for loop?

LucMeekes — Mon, 22 Mar 2021 15:08:32 GMT

Your sheet contains a lot of data and information, so it's not clear (to me) what operations you are talking about.

At first glance, I think you cannot use vectorisation, so you need to program. But it depends heavily on the type of operations you need to perform and how many variables are into play.

Success!
Luc

Re: Vector or for loop?

ttokoro — Tue, 23 Mar 2021 02:45:55 GMT

Instead of V, you can use the function you want to optimize. Then find the maximum or minimum you want.

Re: Vector or for loop?

Fred_Kohlhepp — Tue, 23 Mar 2021 05:30:01 GMT

I've made a start, but this is a long, complicated sheet.

See if the attached Prime 6 file sheds any light. (I got a far as the second moment of inertia.

Re: Vector or for loop?

LN_9876459 — Tue, 23 Mar 2021 12:43:59 GMT

Hi,

Thank you for the help.

This seems to be the solution i searched for. But, i get an error as below. Whats the problem?

Re: Vector or for loop?

ttokoro — Tue, 23 Mar 2021 13:28:40 GMT

Prime7 file attached.

Re: Vector or for loop?

LN_9876459 — Tue, 23 Mar 2021 13:37:04 GMT

Hi,

Thank you for the help, but is it possible for you to send a printscreen? Im using Prime 6, so i can´t open the file.

thanks,

Lisa

Re: Vector or for loop?

Fred_Kohlhepp — Tue, 23 Mar 2021 13:53:47 GMT

Next iteration, up thru glue in Prime 6.0

Re: Vector or for loop?

LN_9876459 — Tue, 23 Mar 2021 14:06:19 GMT

Hi,

Thank you so much for the help and the effort!

Re: Vector or for loop?

Fred_Kohlhepp — Tue, 23 Mar 2021 14:40:30 GMT

don't vectorize here

Re: Vector or for loop?

ttokoro — Tue, 23 Mar 2021 22:55:03 GMT

Your On may be O ctrl+- n, but it should be O [ n, therefore n is index of vector O.

Re: Vector or for loop?

Fred_Kohlhepp — Wed, 24 Mar 2021 14:27:44 GMT

It took some ingenuity, but the attached file (I believe) works thru your sheet and gets it all functioning correctly.

It's in Prime 6.0, and I think it would run in Express (I disabled the solve blocks and programs.