 Rank: Newbie
Groups: Registered
Joined: 21/02/2013(UTC) Posts: 3  Location: Barre, MA
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I'm using SMATH for a controls class that I am taking. I am getting bad values for rank of a matrix.
A=[0,1;1,0]
should return a rank of 2
I keep getting a 1
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 Rank: Advanced Member Groups: Registered
Joined: 15/04/2012(UTC) Posts: 1,986  Was thanked: 1124 time(s) in 721 post(s)
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Seems that you defined A as a column vector. Depending on your settings, the comma serves as decimal point or as function argument separator. type A:mat Enter This gives you a 2x2 Matrix of placeholders. mkraska attached the following image(s): |
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Rank: Newbie
Groups: Registered
Joined: 21/02/2013(UTC) Posts: 3 Location: Barre, MA
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The comma's are from my Scilab equation, sorry about the confusion. It looks like my problem is in the way I calculate the matrix. Attached is a quick test I put together. Ward.Holloway attached the following image(s):
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 Rank: Advanced Member Groups: Registered, Advanced Member Joined: 13/01/2012(UTC) Posts: 2,647   Location: Italy Was thanked: 1329 time(s) in 875 post(s)
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You have made an error defining Γ You need to use the augment() function; without this function you create a nested matrix. BTW there is a bug because calling directly the rank function when the first matrix element is a nested matrix, a type conversion error appears. regards, w3b5urf3r Edited by user 21 February 2013 19:12:44(UTC)
| Reason: Not specified File Attachment(s):  rank.sm (12kb) downloaded 13 time(s).Davide Carpi attached the following image(s): |
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Rank: Newbie
Groups: Registered
Joined: 21/02/2013(UTC) Posts: 3 Location: Barre, MA
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Excellent, thanks to both of you.
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