How to calculate absoulte error?

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Sam
Sam 2015-1-15
回答： Image Analyst 2015-1-15
I've got a datavector (775X1) (look attachment). How do I calculate the absolute error of it? Thanks
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John Petersen
John Petersen 2015-1-15
Typically we compute an error by using a truth with estimated values or desired with a fedback value. What does the data vector you have provided represent? If it's the error, then absolute error could be just the absolute value of the vector. Or if you want to represent the error with a scalar then you could take root mean square. or average the absolute value. It depends on what you want.
Sam
Sam 2015-1-15
this vector represents the force measured on a forceplate, in Newton.

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Image Analyst
Image Analyst 2015-1-15
Like John said, you need to know the "true" values to know the error. Or at least some educated guess at what they might be. Why do you think there is any error at all ? Maybe there's not. If you think there is , then you must have some idea of what the values should be. Given some true, or at least reference, values you can use metrics like PSNR or MAD or RMS to quantify the error or residuals.

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