order of convergence of a numerical method

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Mubashara Wali el 30 de Mzo. de 2021

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https://la.mathworks.com/matlabcentral/answers/788064-order-of-convergence-of-a-numerical-method

I have computed the approximate solution of a differential equation applying trapezoidal rule and also have the exact solution. Now I need to find the order of convergence. My question is how to code it in Matlab to find order of convergence of a numerical method?