# 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 on 11 Jun 2014
Commented: Star Strider on 12 Jun 2014
clc
clear
Idealpoint=(500,700)
calculatedpoint=(499.79,700.44)
error=?
Mehedi on 11 Jun 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

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

Star Strider on 12 Jun 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 CommentsShowHide 1 older comment
Star Strider on 12 Jun 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))