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Student Support Forum: 'Derivative of interpolated function of 2 variab...' topicStudent Support Forum > General > Archives > "Derivative of interpolated function of 2 variab..."

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Dmytro
06/23/09 04:13am

I have problem with the subject...

"f = ListInterpolation[a]" - here I get interpolated function of two variables from 2-dimensional array

Now I have to find extrema of this function. I've tried to do it next way: "Solve[{D[f[x, y], x] == 0, D[f[x, y], y] == 0}, {x, y}]" , but it doesn't work. It gives error: "Solve::dinv: The expression <<1>> involves unknowns in more than one argument, so inverse functions cannot be used. >>"

What should I do in this situation? How to find all minima and maxima of this function?

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