Problem 1699. Find last zero for each column

Created by Matthew Eicholtz

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>Given a numeric array of arbitrary size, return the row index of the last zero for each column. If a column contains all nonzero values, return 0 for that column. Your output should be a row vector.</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[a = [0 0 9 0;\n     0 0 1 8;\n     0 0 4 0;\n     0 0 2 3;\n     0 6 7 5];\n\nz = [5 4 0 3]]]></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

630 Solutions
257 Solvers

Last Solution submitted on Apr 17, 2021

Last 200 Solutions

Problem Comments

1 Comment

1 Comment

Lesandu Wenitha Sugathadasa on 22 Oct 2020

function z = lastzerorow(a)
[~,c]=size(a);
k=zeros(1,c);
for ii=1:c
m=find(a(:,ii)==0)
k(ii)=length(m);
end
z=k;
end

why this isn't working???

Solution Comments

Solution 3055876

1 Comment

1 Comment

ivan fernandez on 4 Oct 2020

While evaluating the solution, the server encountered an error caused by temporary unavailability of MATLAB Service. Wait a few minutes for the MATLAB Service to return, and then rescore. I wanted to participate in the Cody challenge but this is impossible.

Solution 1210601

2 Comments

2 Comments

Xiaoyi Chin on 4 Oct 2017

wonderful

Jobin Jose on 4 Aug 2020

Good

Problem Recent Solvers257

Problem Tags

indexing matrix manipulation

Community Treasure Hunt

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

Start Hunting!

Problem 1699. Find last zero for each column

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers257

Suggested Problems

More from this Author44

Problem Tags

Community Treasure Hunt

Problem 1699. Find last zero for each column

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers257

Suggested Problems

More from this Author44

Problem Tags

Community Treasure Hunt

Players