# numerical derivate and central difference

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payam abubakr 2020년 5월 10일
can anyone help me with this function, please?
find numerical derivative of f(x) = tan−1(?) at x = 2 using central difference scheme where is x is in radians. Use different values of step size h in central difference scheme and compare with true value of the derivative by plotting error for the different h. f(x) means function of x.
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payam abubakr 2020년 5월 10일
i have tried nothing because i don't knoe how to start.

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### 답변(1개)

Jim Riggs 2020년 5월 10일
편집: Jim Riggs 2020년 5월 10일
Here are some Numerical difference formulas using the central difference method (substitute dt = h).
You can find more formulas with even higher accuracy on wikipedia. (see "numerical differentiation" and also "finite difference coefficient"
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@Jim Riggs @payam abubakri also want to calculate gradient(central difference) with window size=10smples with 50% overlap to previous window using attached equation.could you pls help. Thanks

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