Index exceeds the number of array elements (1).
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I am trying to generate a graph for the analytical expression I got and I used for loop since my solution is in summation but i am getting the error
Index exceeds the number of array elements (1).
here is the expression, please help me to rectify the error
for n=0:1:N
d=a.*pi.*(-1).^n.*(2.*n + 1).*sin(sqrt(m./r).*(x - 1)).*exp(-(a + pi.^2.*(2.*n + 1).^2./4).*t)./(m.*(a.*r - m.*(r - 1)).*sin(sqrt(m./r))) - 2.*a.*(((-1).^n.*sin(n.*pi.*(x - 1))./(n(a.*r - n.^2.*pi.^2.*r.*(r - 1)).*cosh(sqrt(-n.^2.*pi.^2.*r + a))) - sin(n.*pi.*x)).*exp(-n.^2.*pi.^2.*r.*t) + (r - 1).*(2.*sin(sqrt(a./(r - 1)).*(x - 1))./sin(2.*sqrt(a./(r - 1))) - sin(sqrt(a./(r - 1)).*x)./sin(sqrt(a./(r - 1))) + cos(sqrt(a./(r - 1)).*x)./cos(sqrt(a./(r - 1)))).*exp(-a.*r.*t./(r - 1))./r)./pi;
end
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