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MC_93705338-Gravel
8-Gravel
May 23, 2022
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Retrive horizontal matrix rows based on vector in Mathcad

  • May 23, 2022
  • 1 reply
  • 1992 views

Hello everyone,

I would like to retrieve certain rows of a matrix based on an initial vector:

Lets say I have the vector Lp and and I want to search the rows in the matrix M (based on the first column) in order to achieve the matrix Final.

Note that the vector Lp can have more numbers as for the Matrix M (this is just an example).

MC_9370533_1-1653309709607.png

Is there a simple way to do this?

 

Thanks in advance for your help.

 

Miguel,

Best answer by StuartBruff
@MC_9370533 wrote:

Hello everyone,

I would like to retrieve certain rows of a matrix based on an initial vector:

Lets say I have the vector Lp and and I want to search the rows in the matrix M (based on the first column) in order to achieve the matrix Final.

Note that the vector Lp can have more numbers as for the Matrix M (this is just an example).

MC_9370533_1-1653309709607.png

Is there a simple way to do this?,

Is this of any help, Miguel?

 

2022 05 23 a.png

 

Prime 7 worksheet attached.   (You can safely ignore everything else that is in the collapsed Areas, I was just using this worksheet as a scratchpad for some other questions)

 

Stuart

1 reply

S
StuartBruff23-Emerald VAnswer
23-Emerald V
May 23, 2022
@MC_9370533 wrote:

Hello everyone,

I would like to retrieve certain rows of a matrix based on an initial vector:

Lets say I have the vector Lp and and I want to search the rows in the matrix M (based on the first column) in order to achieve the matrix Final.

Note that the vector Lp can have more numbers as for the Matrix M (this is just an example).

MC_9370533_1-1653309709607.png

Is there a simple way to do this?,

Is this of any help, Miguel?

 

2022 05 23 a.png

 

Prime 7 worksheet attached.   (You can safely ignore everything else that is in the collapsed Areas, I was just using this worksheet as a scratchpad for some other questions)

 

Stuart

    M
    MC_93705338-GravelAuthor
    8-Gravel
    May 23, 2022

    Hello Stuart,

     

    Yes it works perfectly.

     

    Great, thank you so much for your help.

     

    Miguel,

     

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