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# UserFunctionMD¶

## Description¶

A UserFunctionMD is the multi-dimensional equivalent of UserFunction. It is defined by a string formula. The formula is assigned by setting string attribute Formula:

 “name=UserFunctionMD,Formula=a + y + (b + 0.1*y) * x, a=0, b=2”

The fitting parameters become defined only after the Formula attribute is set that is why Formula must go first in UserFunctionMD definition.

Categories: FitFunctions | General