Formula for Relative Percent Difference...
I'm trying to develop a data control chart and I can't find the function for
relative percent difference...I think it might be a nested function that I need to use? I'm new to this aspect of excel so, please be kind. I have found the formula ABS (A-B)/A but I need a function for relative percent difference....how can I chage the following formula into something that works in excel? (a-b)/((a+b)/2)*100 = relative percent difference, where a is a data point in colum A and b is a data point in colum B? Thanks |
Answer: Formula for Relative Percent Difference...
That's it! You now have the relative percent difference between your two data points. Let me know if you have any other questions or if there's anything else I can help you with. |
Formula for Relative Percent Difference...
JIn an empty cell, just replace the a and b with the actual cell references..and place an = sign in front. e.g =(A2-B2)/((A2+B2)/2)*100 where cell A2 contains your a data point and cell B2 contains your b data point. -- NBVC Where there is a will there are many ways. 'The Code Cage' (http://www.thecodecage.com) ------------------------------------------------------------------------ NBVC's Profile: http://www.thecodecage.com/forumz/member.php?userid=74 View this thread: http://www.thecodecage.com/forumz/sh...d.php?t=125550 |
Formula for Relative Percent Difference...
"bnorris" wrote:
(a-b)/((a+b)/2)*100 = relative percent difference No. I believe RPD is: abs(a-b) / ( (a+b)/2 ) * 100. See http://en.wikipedia.org/wiki/Percent_difference . In Excel, that can be written: =ABS(A1-B1) / AVERAGE(A1,B1) formatted as Percentage. Alternatively: =2*ABS(A1-B1) / (A1 + B1) again formatted as Percentage. ----- original message ----- "bnorris" wrote in message ... I'm trying to develop a data control chart and I can't find the function for relative percent difference...I think it might be a nested function that I need to use? I'm new to this aspect of excel so, please be kind. I have found the formula ABS (A-B)/A but I need a function for relative percent difference....how can I chage the following formula into something that works in excel? (a-b)/((a+b)/2)*100 = relative percent difference, where a is a data point in colum A and b is a data point in colum B? Thanks |
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