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JC_109092061-Visitor
1-Visitor
January 3, 2024
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Comparing vector elements and updating element values

  • January 3, 2024
  • 1 reply
  • 1643 views

Hello,

 

I have been using mathcad for years as a basic user, but do not have much experience using it for matrix operations or programming. 

 

I am trying to create a worksheet that will allow me to feed in data in to several 3x1 matrices and then compare values of the elements of each matrix and then create a new matrix of only the largest values. 

 

However, the resulting output of what I have at the moment is a scaler. How do I instead get a vector result? Please note that I am using Mathcad 15 (and not Mathcad Prime).

 

Thanks!

 

JC_10909206_0-1704311812673.png

 

Best answer by LucMeekes

You get a scalar result from your function because a function always returns the result of the last statement executed.

 

You can define this function (I use a capital M, to distinguish it from the built-in function max ) :

LucMeekes_0-1704315071277.png

Then you can use it to compare two arrays/vectors, e.g.:

LucMeekes_1-1704315117406.png

like this:

LucMeekes_2-1704315128612.png

Note that the vectorise operator is used (the arrow over Max(A,B), you get it by selecting the function and pressing [CTRL _], that is Control-underscore ), if not you'll get an error message.

The vectors need to be the same size, but can be any length.

 

Success!
Luc

1 reply

L
LucMeekes23-Emerald IVAnswer
23-Emerald IV
January 3, 2024

You get a scalar result from your function because a function always returns the result of the last statement executed.

 

You can define this function (I use a capital M, to distinguish it from the built-in function max ) :

LucMeekes_0-1704315071277.png

Then you can use it to compare two arrays/vectors, e.g.:

LucMeekes_1-1704315117406.png

like this:

LucMeekes_2-1704315128612.png

Note that the vectorise operator is used (the arrow over Max(A,B), you get it by selecting the function and pressing [CTRL _], that is Control-underscore ), if not you'll get an error message.

The vectors need to be the same size, but can be any length.

 

Success!
Luc

J
JC_109092061-VisitorAuthor
1-Visitor
January 4, 2024

Many thanks! My version of mathcad did not like that if statement syntax, but I did get it to work as needed.

L
LucMeekes23-Emerald IV
23-Emerald IV
January 5, 2024

I did not use an if-statement, but the if-function... And Mathcad 15 should be happy with that as well.

 

Luc

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