Problem 1057. Given a matrix, return the last eigen value

Created by Marco Castelli

Solve Later

{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","targetMode":"","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","targetMode":"","relationshipId":"rId2","target":"/matlab/output.xml"}],"parts":[{"partUri":"/matlab/document.xml","relationship":[],"contentType":"application/vnd.mathworks.matlab.code.document+xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<w:document xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\"><w:body><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Given a matrix, return the first eigen value</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>For example: x = magic(5)</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[   17   24    1    8   15\n   23    5    7   14   16\n    4    6   13   20   22\n   10   12   19   21    3\n   11   18   25    2    9]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>the function return the last term of eigen vector:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[   65.000\n  -21.277\n  -13.126\n   21.277\n   13.126]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>y = 13.126</w:t></w:r></w:p></w:body></w:document>"},{"partUri":"/matlab/output.xml","contentType":"text/xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?><embeddedOutputs><metaData><evaluationState>manual</evaluationState><layoutState>code</layoutState><outputStatus>ready</outputStatus></metaData><outputArray type=\"array\"/><regionArray type=\"array\"/></embeddedOutputs>"}]}

Solve

Solution Stats

289 Solutions
176 Solvers

Last Solution submitted on Feb 06, 2021

Last 200 Solutions

Problem Comments

4 Comments

4 Comments

Show 1 older comment

Aurelien Queffurust on 30 Nov 2012

How is it possible that the same matrix x in test 2 and test3 give different results? I guess you copy in the test 3 the wrong matrix?

Jean-Marie Sainthillier on 1 Dec 2012

Impossible to understand the tests

@bmtran (Bryant Tran) on 1 Dec 2012

Too much variation on how many digits of precision you want

Marco Castelli on 2 Dec 2012

Now should be ok. Sorry but it is my first problem published.
For any question write me.

Solution Comments

Solution 169270

1 Comment

1 Comment

David on 27 Nov 2012

Add more tests to make this question's scores more relevant!

Problem Recent Solvers176

Problem Tags

eig

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 1057. Given a matrix, return the last eigen value

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers176

Suggested Problems

More from this Author11

Problem Tags

Community Treasure Hunt

Problem 1057. Given a matrix, return the last eigen value

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers176

Suggested Problems

More from this Author11

Problem Tags

Community Treasure Hunt

Players