Problem 45881. Reindex a vector (★★)

Created by Anirban Pal

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>(copy of Prob. 676)</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>You are given two vectors of equal length. Vector N has numeric values (no Inf or NaN) while vector IDX has integers. Place the numerical values in a vector N in the output vector y at indices IDX. All other values in the output vector should be zero.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>For example:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[N = [1 3 2 7];\nIDX= [2 3 4 6];]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>then</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[y_correct = [0 1 3 2 0 7];]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>N(1) goes into y at IDX(1). N(2) goes into y at IDX(2), and so on...</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>If N is a row vector, your output should be a row vector. If N is a column vector, your output should be a column vector.</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

80 Solutions
29 Solvers

Last Solution submitted on Jun 07, 2021

Last 200 Solutions

Problem Recent Solvers29

Problem Tags

vector indexing

Community Treasure Hunt

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

Start Hunting!

Problem 45881. Reindex a vector (★★)

Solution Stats

Last 200 Solutions

Problem Recent Solvers29

Suggested Problems

More from this Author53

Problem Tags

Community Treasure Hunt

Problem 45881. Reindex a vector (★★)

Solution Stats

Last 200 Solutions

Problem Recent Solvers29

Suggested Problems

More from this Author53

Problem Tags

Community Treasure Hunt

Players