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Goodness of fit between test and reference data for analysis and validation of identified models

`goodnessOfFit`

returns fit values that represent the error
norm between test and reference data sets. If you want to compare and visualize simulated
model output with measurement data, see also `compare`

.

returns the goodness of fit between the test data `fit`

= goodnessOfFit(`x`

,`xref`

,`cost_func`

)`x`

and the reference
data `xref`

using the cost function `cost_func`

.
`fit`

is a quantitative representation of the closeness of
`x`

to `xref`

. To perform multiple test-to-reference
fit comparisons, you can specify `x`

and `xref`

as
cell arrays of equal size that contain multiple test and reference data sets. With cell
array inputs, `fit`

returns an array of fit values.