Problem 2172. Delete the rows in the middle

Created by Mehmet OZC

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>We will delete the rows in the middle and keep the first and the last rows.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>For example if input is</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[ [1 2\n  1 7\n  1 8\n  1 6\n  1 5]]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>then output will be</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[ [1 2\n  1 5]]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>keeping the first and the last rows. However there will be more than one row index and that makes this question challenging.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Note: Elements of input row index is always greater than or equal to 2.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Related Challenge -</w:t></w:r><w:r><w:t> </w:t></w:r><w:hyperlink w:docLocation=\"http://www.mathworks.com/matlabcentral/cody/problems/2084-sum-rows\"><w:r><w:t>Problem 2084. Sum Rows</w:t></w:r></w:hyperlink></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

125 Solutions
28 Solvers

Last Solution submitted on Sep 23, 2021

Last 200 Solutions

Problem Comments

2 Comments

2 Comments

Jon on 25 Mar 2014

The description of this problem is not very clear. It's really asking for the first and last row for each unique value in the first column.

rifat on 11 Jun 2014

"However there will be more than one row index and that makes this question challenging." - that really explains nothing to me

Problem Recent Solvers28

Problem Tags

row deletion

Community Treasure Hunt

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

Start Hunting!

Problem 2172. Delete the rows in the middle

Solution Stats

Last 200 Solutions

Problem Comments

Problem Recent Solvers28

Suggested Problems

More from this Author75

Problem Tags

Community Treasure Hunt

Problem 2172. Delete the rows in the middle

Solution Stats

Last 200 Solutions

Problem Comments

Problem Recent Solvers28

Suggested Problems

More from this Author75

Problem Tags

Community Treasure Hunt

Players