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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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Idealpoint=(500,700)
calculatedpoint=(499.79,700.44)
error=?
  4 Commenti
José-Luis
José-Luis il 11 Giu 2014
Modificato: José-Luis il 11 Giu 2014
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 il 11 Giu 2014
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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Risposte (2)

José-Luis
José-Luis il 11 Giu 2014
absolute_error = mean(abs((observed(:) - simulated(:)) ./ observed(:)) .* 100)

Star Strider
Star Strider il 12 Giu 2014
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 Commenti
Mehedi
Mehedi il 12 Giu 2014
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 il 12 Giu 2014
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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