Problem 1140. RMS value from a set of observations

Created by HARISANKAR PS

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Find rms value of a set of observations of a physical quantity?

Hint: The observations are accessed in the form of vectors

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Last solution submitted on Apr 13, 2019

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HARISANKAR PS on 25 Dec 2012

Dear friends some problems with TestBench
assert(isequal(rms_value(x),y_correct))
??? Assertion failed.
I don't know why it happens....

Amin Bashi on 25 Dec 2012

format long
rms_value(x)

ans =

6.204836822995429

Brandon Nipper on 27 Dec 2012

The assertion calls in the last two checks will always fail because they are missing a ). This problem is unsolvable until it gets fixed.

Aritra Chatterjee on 11 Jan 2013

there is certainly some problem wid the test suite...

Aurelien Queffurust on 16 Jan 2013

Please correct or remove test suite 3 : x = [0 0.5 1/sqrt(2) 1 sqrt(2)];

Jihye Sofia Seo on 10 Feb 2017

Bad test cases!

Solution Comments

Solution 890683

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William on 17 May 2016

The RMS is defined as the root-mean-squared deviation *from the mean*, not from zero ... so I think the whole test suite needs fixing.

Solution 185311

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1 Comment

Christopher on 3 Jan 2013

All but one of the test cases require solutions truncated to an arbitrary precision. The other expects an exact solution, but not quite the exact solution I arrive at. Maybe RMS has a special connotation I've forgotten when it involves complex numbers?

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Problem 1140. RMS value from a set of observations

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Problem 1140. RMS value from a set of observations

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