Subtracting matrices with a different number of columns

Subtracting matrices with a different number of columns - Arithmetic operation with a varying number of columns. - Mensajes

#1 Publicado: 19/11/2025 8:25:09
Thomas

Thomas

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Hi,

Rc can have any number of columns and I want to subtract one column (xc, xy...) from that.

Is this only possible with a loop, or is there a more elegant way?


Bildschirmfoto vom 2025-11-19 09-24-20.png
Yoshi
#2 Publicado: 19/11/2025 20:07:43
Martin Kraska

Martin Kraska

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It seems that you should write Rc: L-xc where xc is the vector of coordinates of the reference point. But you better attach an sm file and a more comprehensible description of what you want. I don't see a matrix with multiple columns in your example.
Editado 19/11/2025 20:08:39
Technische Mechanik mit SMath Studio: https://link.springer.com/book/10.1007/978-3-658-50592-9
#3 Publicado: 20/11/2025 7:43:34
Thomas

Thomas

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Hi Martin, here is the worksheet.
Rc should be calculated automatically depending on the number of forces entered.

bolt_pattern.sm (42,76 KiB) descargado 991 vez(es).
Editado 20/11/2025 9:52:44
Yoshi
#4 Publicado: 21/11/2025 10:11:24
StvMath

StvMath

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Like this?

Vectors.png
#5 Publicado: 21/11/2025 12:02:20
Martin Kraska

Martin Kraska

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Slightly different solution

grafik.png
Technische Mechanik mit SMath Studio: https://link.springer.com/book/10.1007/978-3-658-50592-9
#6 Publicado: 21/11/2025 13:22:56
Thomas

Thomas

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Thank you very much for your help, it works perfectly now. Martin's solution is a little more compact, but both work.

bolt_pattern.sm (39,73 KiB) descargado 982 vez(es).

Editado 21/11/2025 13:51:59
Yoshi
#7 Publicado: 21/11/2025 16:10:30
Alvaro

Alvaro

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Hi. Third option: vectorize twice.

image.png

bolt_pattern.sm (52,91 KiB) descargado 986 vez(es).

Best regards.
Alvaro.
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