Problem 139. Determine if a Given Number is a Triangle Number

Created by @bmtran (Bryant Tran)

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:rPr><w:b/></w:rPr><w:t>Description:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Determine if the elements of an input array are triangle numbers and return the result as an array with the same dimensions as the input.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:rPr><w:b/></w:rPr><w:t>Example:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[    Input  = [ 1 2 3 ];\n    Output = [ 1 0 1 ];]]></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

1062 Solutions
311 Solvers

Last Solution submitted on Oct 21, 2020

Last 200 Solutions

Problem Comments

Solution Comments

Solution 2003102

1 Comment

1 Comment

Bob Lin on 5 Nov 2019

Watch out! Martix size!

Solution 1102049

2 Comments

2 Comments

Lucinda King on 11 Jan 2017

This works in Matlab but not here? It fails on Test 3, but when I use the same value of x and the same function in Matlab it works...

Jan Orwat on 13 Jan 2017

Your output y is a row vector (or scalar), but in 3'rd test it should be a column vector. Predefine y first with the same size as x.

Solution 549639

1 Comment

1 Comment

Ramoflaple on 10 Jul 2015

good solution

Problem Recent Solvers311

Problem Tags

triangle numbers

Community Treasure Hunt

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

Start Hunting!

Problem 139. Determine if a Given Number is a Triangle Number

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers311

Suggested Problems

More from this Author56

Problem Tags

Community Treasure Hunt

Problem 139. Determine if a Given Number is a Triangle Number

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers311

Suggested Problems

More from this Author56

Problem Tags

Community Treasure Hunt

Players