normcalc.m - function[L2 EN = normcalc(x,h,N for uniform...

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function [L2, EN] = normcalc(x,h,N) % for uniform mesh only for i = 1:N err_L2 = @(xi) (xi.^2 - ((-(1/h)*xi + x(i+1)/h)*(x(i).^2) +... ((1/h)*xi - x(i)/h)*(x(i+1).^2))).^2; L2 = integral(err_L2,x(i),x(i+1));
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