Percent Error When The Theoretical Is 0
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Percent Error When Actual Value Is Zero
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Percent Error When True Value Is 0
_ Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. Join them; it only takes a minute: Sign up percent error when expected value is zero Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top How to calculate relative error when true value is zero? up vote 10 down vote favorite 3 How do I calculate relative error when the true value is zero? Say I have $x_{true} = 0$ and $x_{test}$. If I what is a good percent error define relative error as: $\text{relative error} = \frac{x_{true}-x_{test}}{x_{true}}$ Then the relative error is always undefined. If instead I use the definition: $\text{relative error} = \frac{x_{true}-x_{test}}{x_{test}}$ Then the relative error is always 100%. Both methods seem useless. Is there another alternative? statistics share|cite|improve this question asked Feb 15 '14 at 22:41 okj 9511818 1 you need a maximum for that.. –Seyhmus Güngören Feb 15 '14 at 23:06 1 Simple and interesting question, indeed. Could you tell in which context you face this situation ? Depending on your answer, there are possible alternatives. –Claude Leibovici Feb 16 '14 at 6:24 1 @ClaudeLeibovici: I am doing a parameter estimation problem. I know the true parameter value ($x_{true}$), and I have simulation data from which I infer an estimate of the parameter ($x_{test}$). I want to quantify the error, and it seems that for my particular case relative error is more meaningful than absolute error. –okj Feb 17 '14 at 14:05 1 What about $\text{error} = 2 \frac{x_{true}-x_{test}}{x_{true}+x_{test}}$ if it is for an a posteriori analysis ? –Claude Leibovici Feb 17 '14
value=0.00012. What is the percentage error? Is it infinite?UpdateCancelAnswer Wiki3 Answers Ratish Saroya, learnerWritten 57w agoPercent error = (Estimated
Absolute Error Formula
value - Actual value) / Actual value × 100% (in percent error calculator absolute value)Percent error = (Theoretical value - Actual value) / Theoretical value × 100% (in absolute value)*It
Percentage Error
will be treated as Theoretical value if it is well known, otherwise it is an estimate.In first case % error is 100%and in second, it can not http://math.stackexchange.com/questions/677852/how-to-calculate-relative-error-when-true-value-is-zero be found i.e. infinite You can say that 50% of 1 is .5, or 20% of 1 is .2but what would be 50% or x% of 0.0 is just a point on number line, whereas other numbers are intervals, from 0 to that number, when we talk in sense of %age.842 Views · Answer requested https://www.quora.com/When-doing-a-lab-practical-I-got-a-theoretical-value-0-and-practical-value-0-00012-What-is-the-percentage-error-Is-it-infinite by 1 personRelated QuestionsMore Answers BelowIs 1/0 infinity?Division by Zero: If 1/1 equals 1, 2/2 equals 1, and 3/3 equals 1, then what does 0/0 equal?Why do scientists consider (infinite/infinite) an undefined value?Are there any practical application for mean value theorem?Is 0×0 a finite value? Subhajit Das, Learning the ways of a grown up lifeWritten 57w agoNo, the percentage error is 0.527 Views · Answer requested by 1 person Howard Shi, 16+ years of mathematics, always interested in learning something newWritten 57w ago0.00012 rounds to 0.00, or just o. Percentage error is 0523 Views · Answer requested by 1 personView More AnswersRelated QuestionsWhat is the practical application of Logarithmic values?Imagine two parallel lines, and you tilt one of them by an infinitely small value (or 0.00000001 degrees) what would happen?What is the value of [math]\dfrac{ ∞}{0}[/math]?What is the value of [math]\dfrac{0}{∞}[/math] ?What are the best practical applications of infinite series?Math: how do you find all the values of t so that 10e/\Bt>0?
»PhysicscommentsWant to join? Log in or sign up in seconds.|Englishlimit my search to /r/Physicsuse the following search parameters to narrow your results:subreddit:subredditfind submissions in "subreddit"author:usernamefind submissions by "username"site:example.comfind https://www.reddit.com/r/Physics/comments/11x431/how_to_calculate_the_percent_error_when_the/ submissions from "example.com"url:textsearch for "text" in urlselftext:textsearch for "text" in self post contentsself:yes (or self:no)include https://en.wikipedia.org/wiki/Relative_change_and_difference (or exclude) self postsnsfw:yes (or nsfw:no)include (or exclude) results marked as NSFWe.g. subreddit:aww site:imgur.com dogsee the percent error search faq for details.advanced search: by author, subreddit...this post was submitted on 23 Oct 20120 points (50% upvoted)shortlink: remember mereset passwordloginSubmit a new linkSubmit a new text postPhysicssubscribeunsubscribe143,980 readers306 users here nowThe aim of /r/Physics percent error when is to build a subreddit frequented by physicists, scientists, and those with a passion for physics. Posts should be pertinent and generate a discussion about physics. Please choose a user flair using the 'edit' option next to your username above. IRC Channel: #physics on irc.snoonet.org chat with us Encouraged submissions Open-ended discussions Debates and discussions on all topics related to physics are welcome. Please make an effort to engage the community rather than simply state your views and expect others to validate them. Shorter questions which are more st
"sizes" of the things being compared. The comparison is expressed as a ratio and is a unitless number. By multiplying these ratios by 100 they can be expressed as percentages so the terms percentage change, percent(age) difference, or relative percentage difference are also commonly used. The distinction between "change" and "difference" depends on whether or not one of the quantities being compared is considered a standard or reference or starting value. When this occurs, the term relative change (with respect to the reference value) is used and otherwise the term relative difference is preferred. Relative difference is often used as a quantitative indicator of quality assurance and quality control for repeated measurements where the outcomes are expected to be the same. A special case of percent change (relative change expressed as a percentage) called percent error occurs in measuring situations where the reference value is the accepted or actual value (perhaps theoretically determined) and the value being compared to it is experimentally determined (by measurement). Contents 1 Definitions 2 Formulae 3 Percent error 4 Percentage change 4.1 Example of percentages of percentages 5 Other change units 6 Examples 6.1 Comparisons 7 See also 8 Notes 9 References 10 External links Definitions[edit] Given two numerical quantities, x and y, their difference, Δ = x - y, can be called their actual difference. When y is a reference value (a theoretical/actual/correct/accepted/optimal/starting, etc. value; the value that x is being compared to) then Δ is called their actual change. When there is no reference value, the sign of Δ has little meaning in the comparison of the two values since it doesn't matter which of the two values is written first, so one often works with |Δ| = |x - y|, the absolute difference instead of Δ, in these situations. Even when there is a reference value, if it doesn't matter whether the compared value is larger or smaller than the reference value, the absolute difference can be considered in place of the actual change. The absolute difference between two values is not always a good way to compare the numbers. For instance, the absolute difference of 1 between 6 and 5 is more significant than the same absolute difference between 100,000,001 and 100,000,000. We can adjust the comparison to take into account the "si