Problem 137. wait for me

Created by AMITAVA BISWAS

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>wait exactly x seconds please, need not be more than 2 seconds but must be accurate within say 50 milliseconds, your function must honestly output the amount of time it has actually waited and that will be tested against what it was supposed to do.</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

461 Solutions
85 Solvers

Last Solution submitted on May 16, 2021

Last 200 Solutions

Problem Comments

3 Comments

3 Comments

@bmtran (Bryant Tran) on 28 Jan 2012

i think the best thing for this problem would be for you to do the timing in the test suite so that the player only needs to write the code to do the waiting. This will also prevent the user from just outputting the input argument.

Matt Fig on 28 Jan 2012

You say that the function should return the time to within tol, yet you test for exact equality in the test suite? Why not test using the tol to conform to your description?

Peter Wittenberg on 29 Jul 2012

I succeeded in making this work in MATLAB, but I can't get it to work for the tests that occur here. From the solution map, it looks like others have the same frustration. Please follow the advice of bmtran and Fig, rewriting the problem so that the requirements are clear and there is not a problem with using tic in the function itself.

Solution Comments

Solution 74303

1 Comment

1 Comment

Mark Taylor on 11 Apr 2012

Currently the test for this problem demands accuracy to the nearest 1/10 millisecond. I see a number of solutions (including mine) resort to cheating to achieve this. I'm not sure whether it is currently possible to solve this problem without cheating.

Problem Recent Solvers85

Problem Tags

poor_problem_statement poor_test_suite wait

Community Treasure Hunt

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

Start Hunting!

Problem 137. wait for me

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers85

Suggested Problems

More from this Author100

Problem Tags

Community Treasure Hunt

Problem 137. wait for me

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers85

Suggested Problems

More from this Author100

Problem Tags

Community Treasure Hunt

Players