Pivotal Rounding Floating Point Error
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Floating Point Precision Error
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Excel Rounding Error Example
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Floating Point Numbers Explained
only takes a minute: Sign up 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 correct floating point round-off error in Microsoft https://support.microsoft.com/en-us/kb/214118 Excel for Macintosh 2011? up vote 0 down vote favorite I'm using Microsoft Excel for Macintosh 2011 and have a spreadsheet of start and stop time spent on activities with some time differences between start and stop times that are converted into total hours in two different paths. In one path, the whole column of time differences is summed all at once. In a separate path, a series of subsets of the column for adjacent http://superuser.com/questions/863192/how-to-correct-floating-point-round-off-error-in-microsoft-excel-for-macintosh-2 rows is summed into a different column (all corresponding to a single day), which is itself summed to theoretically get the same sum as the first sum. I am subtracting these two sums and if the result is non-zero, I have conditional formatting to color it red to alert the user to an error in their spreadsheet and that the two paths/methods for summing do not agree. My formula has been working well, however, as my spreadsheet has now grown to around 1,500 rows, I am now seeing round-off errors where the two different paths to sum up the times get slightly different values that differ by 0.000000000000909494701773 hours and the cell is being highlighted red for being non-zero. How can I avoid the round-off drift that is occurring between these two paths to compute the same sum? I have found that I can temporarily work around the issue by increasing one entry in the sum by 1 second and the difference returns to zero again and the cell goes green again. Is this a known issue with Excel? Can I cause my zero compare conditional formatting to allow more slop in the comparison? Can I force the two paths to compute the sums to agree without adding in a second to one of the times? microsoft-excel microsoft-excel-2011 share|improve this question edited Jan 13 '
van GoogleInloggenVerborgen veldenBoekenbooks.google.nl - Software requirements for engineering and scientific applications are almost https://books.google.com/books?id=jtKc0k5BWA8C&pg=PA370&lpg=PA370&dq=pivotal+rounding+floating+point+error&source=bl&ots=kHWVfjZn78&sig=3gc088P5x-SJI4dHeC9S7o9Zk8Q&hl=en&sa=X&ved=0ahUKEwi68dKeq-fPAhWEuhoKHZV9CvsQ6AEISzA always computational and possess an advanced mathematical component. However, an application that calls for calculating a statistical function, or performs basic differentiation of integration, cannot be easily developed in...https://books.google.nl/books/about/Software_Solutions_for_Engineers_and_Sci.html?hl=nl&id=jtKc0k5BWA8C&utm_source=gb-gplus-shareSoftware Solutions for Engineers and ScientistsMijn bibliotheekHelpGeavanceerd zoeken naar boekeneBoek kopen floating point - € 109,40Dit boek in gedrukte vorm bestellenCRC PressBol.comProxis.nlselexyz.nlVan StockumAlle verkopers»Software Solutions for Engineers and ScientistsJulio Sanchez, Maria P. CantonCRC Press, 18 okt. 2007 - 944 pagina's 0 Recensieshttps://books.google.nl/books/about/Software_Solutions_for_Engineers_and_Sci.html?hl=nl&id=jtKc0k5BWA8CSoftware requirements for engineering and scientific applications are almost always computational and rounding error example possess an advanced mathematical component. However, an application that calls for calculating a statistical function, or performs basic differentiation of integration, cannot be easily developed in C++ or most programming languages. In such a case, the engineer or scientist must assume the role of software developer. And even though scientists who take on the role as programmer can sometimes be the originators of major software products, they often waste valuable time developing algorithms that lead to untested and unreliable routines. Software Solutions for Engineers and Scientists addresses the ever present demand for professionals to develop their own software by supplying them with a toolkit and problem-solving resource for developing computational applications. The authors' provide shortcuts t