topic Re: Shifting Matrix/Vector in Mathcad in Mathcad

Shifting Matrix/Vector in Mathcad

Mathcad111 — Sat, 18 Jun 2022 09:48:18 GMT

Example:

Re: Shifting Matrix/Vector in Mathcad

terryhendicott — Sat, 18 Jun 2022 10:28:47 GMT

Hi,

Like this:-

Cheers

Terry

Re: Shifting Matrix/Vector in Mathcad

Mathcad111 — Mon, 20 Jun 2022 04:33:38 GMT

Hi, this method is not working for -ve values and floating values in 'D', Pse suggest

Eg: D=(0 1 -2 0)

Eg: D=(0 1.5 -2 0)

Re: Shifting Matrix/Vector in Mathcad

terryhendicott — Mon, 20 Jun 2022 05:24:26 GMT

Hi,

Can you please provide an original "S" matrix and a Resulting matrix "Res" when you use a negative whole number in "D"? I imagine this means a rotation of "S" values downwards in that column? Can do this.

Can you please provide an original "S" matrix and a Resulting matrix "Res" when you use a floating value in "D"? Not sure what this means?

Cheers

Terry

Re: Shifting Matrix/Vector in Mathcad

Mathcad111 — Mon, 20 Jun 2022 05:47:56 GMT

terryhendicott - 'I imagine this means a rotation of "S" values downwards in that column?' - Yes

terryhendicott -'when you use a floating value in "D"? Not sure what this means?' - ok just for now, we will avoid/omit this requirement, let only focus on '-ve' values

terryhendicott -'Can you please provide an original "S" matrix and a Resulting matrix "Res"', - currently I can't, i'll work on the same shortly.

Re: Shifting Matrix/Vector in Mathcad

Mathcad111 — Mon, 20 Jun 2022 06:31:13 GMT

Pse check below attached,

Re: Shifting Matrix/Vector in Mathcad

Mathcad111 — Mon, 20 Jun 2022 07:14:04 GMT

Tried this method but its not working, PFA.

Re: Shifting Matrix/Vector in Mathcad

terryhendicott — Mon, 20 Jun 2022 08:31:56 GMT

Hi,

Hoping this is what you are seeking:-

Cheers

Terry

Re: Shifting Matrix/Vector in Mathcad

Mathcad111 — Mon, 20 Jun 2022 08:50:33 GMT

Thanks lot for response, i'll check the same.

Re: Shifting Matrix/Vector in Mathcad

LucMeekes — Mon, 20 Jun 2022 11:39:36 GMT

Note that with a matrix of 4 rows, shifting 2 or -2 is the same.

Shifting a matrix over a non-integer amount of rows is not obvious. How would you define it?

Success!
Luc

Re: Shifting Matrix/Vector in Mathcad

Werner_E — Mon, 20 Jun 2022 12:29:33 GMT

Her are my 2 cents

Re: Shifting Matrix/Vector in Mathcad

LucMeekes — Mon, 20 Jun 2022 21:14:02 GMT

OK, here's an implementation that takes an approach also for non-integer values of the 'number of elements to shift':

Works also in Express.

(Prime 4 file attached)

Success!

Luc