Problem 367. Specific Element Count

Created by @bmtran (Bryant Tran)

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2633 Solutions
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Last Solution submitted on Jan 08, 2022

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Solution 3553135

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Swati Sarangi on 5 Nov 2020

The below code fails for the input:
assert(isequal(ecount([1 1 1 1 NaN NaN 1 1],NaN),2))

Can anyone show me the error?

function ct = ecount(v,e)
s=0;
for i=1:length(v)
if v(i)==e
s=s+1;
elseif v(i)=='NaN'
s=s+1;
i=i+1;
end
ct =s;

end

Solution 1552355

1 Comment

1 Comment

Peter Corke on 7 Jun 2018

The comment about NaNs being equal is rather vague, clarify or give a specific example

Solution 471034

2 Comments

2 Comments

Harish Maradana on 13 Jul 2014

NaN==NaN gives 0 help me

Xiangbing Jiao on 11 May 2019

Use isnan keyword. isnan(NaN) gives 1

Solution 397087

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1 Comment

Andrew on 5 Feb 2014

There should be a test to stop this from passing

Solution 217331

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1 Comment

Tim on 14 Mar 2013

This just got lucky on the test suite. It would fail on ecount(1:12,2), for example.

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Problem 367. Specific Element Count

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Problem 367. Specific Element Count

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