Problem 713. Find the maximum number of decimal places in a set of numbers

Created by Vincent

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 vector or matrix of values, calculate the maximum number of decimal places within the input. Trailing zeros do not count as significant. No significant digits will result in an answer of 0.</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[x = [0.01 0.888 1.0 40.151 39.1244];\n\ny = 4;]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>The maximum number of significant decimal places from the input is 4 (39.1244).</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

10275 Solutions
1493 Solvers

Last Solution submitted on May 15, 2022

Last 200 Solutions

Problem Comments

7 Comments

7 Comments

Show 4 older comments

nguyen thai son son on 30 Sep 2019

hại não

galaxy on 23 Oct 2019

good for improve skill

goc3 on 29 Mar 2021

@Ayesha Alfili HCT2021: your comment was deleted, as it revealed a large part of a potential solution. If you need help with an attempted solution, comment on that solution without copying it into a comment.

akihisa yorozu on 21 Aug 2021

I feel some uncomfortableness to solve with a not mathematical method, like text processing. But it may smarter than take care of floating point, round error, etc.

Amit Jakubowitz on 18 Sep 2021

hi my code works for tests 1 3 4 but not for test 2, can anyone help me?
here is my code:

function y = find_max_sigdec(x)
how_much_dec=[0]*[length(x)];
for i=1:length(x);
count=0;
while x(i)~=round(x(i))
x(i)=x(i)*10;
count=count+1;
end
how_much_dec(i)=count
end
y=max(how_much_dec)
end

Matthew Bronson on 7 Oct 2021

struggled for a bit with "format long" adding a value at 1e15.

Elizabeth Moschello on 1 Dec 2021

definitely a tough problem!

Solution Comments

Solution 7503175

1 Comment

1 Comment

kt on 9 Feb 2022

~fun with strings~

Solution 6981414

1 Comment

1 Comment

Haoran Tian on 28 Nov 2021

it is a hard problem

Solution 6912019

1 Comment

1 Comment

Josh Klueber on 18 Nov 2021

not sure why the format and spacing mattered on this specific problem

Solution 5953890

2 Comments

2 Comments

KARTIK SHARMA on 13 Jun 2021

A tough one!

Isabella Stellitano on 8 Nov 2021

good problem

Solution 5680875

1 Comment

1 Comment

john perkins on 4 May 2021

this was a very challenging problem!

Solution 4143505

1 Comment

1 Comment

Cory Cunningham on 11 Dec 2020

Had a tough time with this one

Solution 1733391

Problem Recent Solvers1493

Problem Tags

decimal strings

Community Treasure Hunt

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

Start Hunting!