fyi, a function in Mathematica is defined using _ as in f[w_,x_,y_,z_]:=. Mathematica treats the Interpolating Function like a numerically defined function, so you can plot it, numerically integrate it, etc. Fortunately, many examples in electromagnetism have that property. The Mathematica commands in this tutorial are all written in bold black font, while Mathematica output is in normal font. This section is dedicated to the description of the di↵erent plotting functions available in Mathematica. This video tutorial covers basic plotting of functions using Mathematica. Choose the type of plot desired, supply the values of the parameters which are not selected as free variables, and click "Evaluate." Assigning and Inserting Variables or Parameters. The relation between the parameter sets is given in the Details section. The Mathematica commands in this tutorial are all written in bold black font, while Mathematica output is in normal font. 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