I have the ideal point (500,700) and the calculated point (499.79,700.44). I want to calculate the error but i can't. Please help me out

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Mehedi
Mehedi 2014-6-11
评论： Star Strider 2014-6-12
clc
clear
Idealpoint=(500,700)
calculatedpoint=(499.79,700.44)
error=?
  4 个评论
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José-Luis
José-Luis 2014-6-11
编辑：José-Luis 2014-6-11
What have you tried so far? If you would like to learn how to perform basic arithmetics in Matlab, please refer to the "Getting started" part of the documentation.
absolute_error = abs((observed - simulated) ./ observed) .* 100
Mehedi
Mehedi 2014-6-11
your answer is perfect when i calculate error for a single value. but i want to calculate error for two value x and y. please, help me

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回答（2 个）

José-Luis
José-Luis 2014-6-11
absolute_error = mean(abs((observed(:) - simulated(:)) ./ observed(:)) .* 100)
Star Strider
Star Strider 2014-6-12
How I would do it:
Idealpoint = [500,700];
calculatedpoint=[499.79,700.44];
pct_abs_err = 100 * abs((Idealpoint-calculatedpoint)./Idealpoint)
produces:
pct_abs_err =
42.0000e-003 62.8571e-003
  2 个评论
Mehedi
Mehedi 2014-6-12
In your result, we found two error. one error for x and one error for y. But i need a single error which contain above both error. Please, help me in this regard
Star Strider
Star Strider 2014-6-12
The usual practice is to calculate the error for each one.
If you want the combined error, I suppose taking the mean of both would work:
pct_abs_err = mean(100 * abs((Idealpoint-calculatedpoint)./Idealpoint))

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