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

    clc
    clear
    Idealpoint=(500,700)
    calculatedpoint=(499.79,700.44)
    error=?

[José-Luis]

What's the error function? Absolute error? Squared error? Separately for x and y?

[Mehedi]

Absolute error in percentage

[José-Luis]

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]

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

Answer 1

[José-Luis]

 absolute_error = mean(abs((observed(:) - simulated(:)) ./ observed(:)) .* 100)

Answer 2

[Star Strider]

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

[Mehedi]

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]

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))