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Joined: 30/03/2020(UTC) Posts: 31 Location: KU Was thanked: 3 time(s) in 2 post(s)
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Rank: Advanced Member Groups: Registered, Advanced Member Joined: 13/01/2012(UTC) Posts: 2,648 Location: Italy Was thanked: 1331 time(s) in 876 post(s)
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Originally Posted by: hawe This link doesn't works, be sure to use the share button link (on the right of the save button), because the address bar link is restricted to the author only. |
If you like my plugins consider to support SMath Studio buying a plan; to offer me a coffee: paypal.me/dcprojects |
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Rank: Advanced Member Groups: Registered
Joined: 30/03/2020(UTC) Posts: 31 Location: KU Was thanked: 3 time(s) in 2 post(s)
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Upps, sorry Made a link https://de.smath.com/cloud/worksheet/3BgYDE7e,Maxima pure (%i6) A: matrix([1,1,1,-1,0],[0,1,0,0,1],[0,0,0,1,0],[0,0,-1,2,1],[0,0,0,0,1])$ (%i7) A-1*ident(5)$ (%i5) rank(A-1*ident(5)); (%o5) 3 but Maxima(rank(A-1*identity(5)))=4 or DimEigenraum: (n-rank(A-λ*E))=1
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The referenced sheet seems to use Maxima(). This doesn't work, as third party plug-ins aren't available in the cloud version. It is better to attach such files here. |
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rank(M) ... matrix rank is Smath built-in. Here is a most precious application. Matrix PseudoInverse.sm (112kb) downloaded 9 time(s).
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Joined: 30/03/2020(UTC) Posts: 31 Location: KU Was thanked: 3 time(s) in 2 post(s)
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Originally Posted by: Jean Giraud and in how far do your example explain the incorrect calculation Originally Posted by: mkraska The referenced sheet seems to use Maxima(). This doesn't work, as third party plug-ins aren't available in the cloud version. It is better to attach such files here. the Maxima part calculate the single eigenvalue which is set manually in cloud version JordanMatrix5x5-5fachEW-HV.1.2.Stufe .sm (48kb) downloaded 11 time(s).Edited by user 20 April 2020 00:59:39(UTC)
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Joined: 28/08/2014(UTC) Posts: 1,356 Was thanked: 815 time(s) in 516 post(s)
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Hi. You're right, it's a bug and there are no way to make this works (numerical nor symbolic): First column is zero and 3th = - 4th columns, so can't be rank = 4. Best regards. Alvaro.
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Originally Posted by: hawe and in how far do your example explain the incorrect calculation Just advanced maths above the classroom. Your example replies bug from incorrectly threaded input. As given, your [5*5] matrix has no mathematical meaning. Page1 rank.sm (12kb) downloaded 14 time(s).
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1 user thanked Jean Giraud for this useful post.
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Rank: Guest
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... clean the bugger What application do you have for "rank(,) ? Don't confuse with Rank in Data Analysis. rref [Row Reduce Echelon Function] is a damned long monkey business. Has it been done in Smath ... Watson ?
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Rank: Guest
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Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 981 time(s) in 809 post(s)
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... Rank(V) Given a set of data values, the rank of each value is the position at which that value appears in a sorted list of the data. When values repeat, the rank is an average of the indices where the value occurs after sorting.
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