Problem 308. Matrix with different incremental runs

Created by Julio

Solve Later

{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","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\"?><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 vector of positive integers a (>=0); How does one create the matrix where the ith column contains the vector 1:a(i) possibly padded with zeros:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/><w:jc w:val=\"left\"/></w:pPr><w:r><w:t>in->a = [3 2 4];</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/><w:jc w:val=\"left\"/></w:pPr><w:r><w:t>out->b = [1 1 1;2 2 2;3 0 3;0 0 4];</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

168 Solutions
93 Solvers

Last Solution submitted on May 25, 2020

Last 200 Solutions

Problem Comments

Solution Comments

Solution 37925

1 Comment

1 Comment

Julio on 12 Feb 2012

yes of course. Leading solution:
function b = matInc(a)
[b aa] = ndgrid(1:max(a), a);
b(b > aa) = 0;
end
regards,

Problem Recent Solvers93

Problem Tags

logical matrix

Problem 308. Matrix with different incremental runs

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers93

Suggested Problems

More from this Author10

Problem Tags

Problem 308. Matrix with different incremental runs

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers93

Suggested Problems

More from this Author10

Problem Tags

Players