Problem 43301. Calculate inverse matrix in m by n matrix

Created by Jang geun Choi

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=\"code\"/></w:pPr><w:r><w:t><![CDATA[x=(1:10)'\ny=roundn(2*x+7*rand(size(x)),-1)]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>a*x=y</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Estimate a using inverse matrix calculation. This is principle of linear regression.</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

382 Solutions
65 Solvers

Last Solution submitted on Aug 12, 2020

Last 200 Solutions

Problem Comments

2 Comments

2 Comments

Matthew Eicholtz on 10 Oct 2016

As a friendly reminder, we can see the test suite, so it makes the problem more challenging if the solution is not explicitly in the test suite.

David Verrelli on 4 Jul 2018

The Test Suite needs to allow for floating-point errors in all test cases, as demonstrated in Solution 1575603. (Refer to Problem 44690.) Also, there should be at least four test cases for every problem.

Problem Recent Solvers65

Problem Tags

easy koaa linear algebra math poor_problem_statement poor_test_suite review simple

Problem 43301. Calculate inverse matrix in m by n matrix

Solution Stats

Last 200 Solutions

Problem Comments

Problem Recent Solvers65

Suggested Problems

More from this Author27

Problem Tags

Problem 43301. Calculate inverse matrix in m by n matrix

Solution Stats

Last 200 Solutions

Problem Comments

Problem Recent Solvers65

Suggested Problems

More from this Author27

Problem Tags

Players