Vector & matrix element magnitudes

Vector & matrix element magnitudes - Absolute or magnitude of elements in a vector - Messages

#1 Posted: 12/18/2012 8:16:17 AM
FrugalTPH

FrugalTPH

0 likes in 2 posts.

Group: User

Hi,

I have a vector of tension & compression values signified by positive or negative values.

I am trying to return the maximum absolute value, regardless of tension or compression. In other words, I need to knock all the minus's off every element in the vector, and then return the Max value in the vector.

Is there a function for this (I can't find one), or how do I implement it quite simply?

I have found and installed customfunctions.dll which gives me better Max / Min functions that work on vectors, but this will still not work for me in this case, as it doesn't account for +ve or -ve.

Anyone got a solution?

Thanks.
#2 Posted: 12/18/2012 8:48:03 AM
kilele

kilele

133 likes in 397 posts.

Group: User

try 'absolute value' with the function 'mat2sys' included in customFunctions-plugin

Look at this post to see if it applies to your problem:
Apply a function over an array or vector
#3 Posted: 12/18/2012 9:01:46 AM
FrugalTPH

FrugalTPH

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Group: User

Ah, that kind of worked.

Went with: Max(abs(mat2sys(V)))

I'm not familiar with 'systems', so unsure why that works and it doesn't with a matrix as defined. Is that an Smath thing? I don't recall MathCAD doing that.
#4 Posted: 12/18/2012 9:19:48 AM
Davide Carpi

Davide Carpi

1415 likes in 2872 posts.

Group: Moderator

Wrote

Hi,

I have a vector of tension & compression values signified by positive or negative values.

I am trying to return the maximum absolute value, regardless of tension or compression. In other words, I need to knock all the minus's off every element in the vector, and then return the Max value in the vector.

Is there a function for this (I can't find one), or how do I implement it quite simply?

I have found and installed customfunctions.dll which gives me better Max / Min functions that work on vectors, but this will still not work for me in this case, as it doesn't account for +ve or -ve.

Anyone got a solution?

Thanks.



Hi FrugalTPH,

You can find the absolute maximum/minimum value also using the built-in functions (see the attachment).


regards,

w3b5urf3r
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1 users liked this post
Radovan Omorjan 12/18/2012 11:31:00 AM
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