optimization of n for dual blaze wavelength

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This code has two optimization value along with two weight i.e. [1541;3160;0.5;0.5]
everytime i run the code i recieved the mentioned error
Please provide the solution of same.
thank you
clear all
clc
% N=[linspace(700,5000,0.5) linspace(0,0.5,0.01)];
N= linspace(700,5000,500);
% n= linspace(0,0.5,500);
y = cell2mat(arrayfun(@roo2d, N, 'uniform', 0));
% Z = cell2mat(arrayfun(@roo2d, X, 'uniform', 0));
plot(N, y.');
yline(0, 'k')
format long g
[sol, fval1] = fsolve(@roo2d, 1300);
function F = roo2d(n)
F=[((sin(pi*((n(1)/700)-1))/(pi*((n(1)/700)-1)))^2)*n(3)+ ((sin(pi*((n(2)/700)-1))/(pi*((n(2)/700)-1)))^2)*n(4)-0.31;
((sin(pi*((n(1)/1100)-1))/(pi*((n(1)/1100)-1)))^2)*n(3)+ ((sin(pi*((n(2)/1100)-1))/(pi*((n(2)/1100)-1)))^2)*n(4)-0.42;
((sin(pi*((n(1)/1500)-1))/(pi*((n(1)/1500)-1)))^2)*n(3)+ ((sin(pi*((n(2)/1500)-1))/(pi*((n(2)/1500)-1)))^2)*n(4)-0.50;
((sin(pi*((n(1)/2000)-1))/(pi*((n(1)/2000)-1)))^2)*n(3)+ ((sin(pi*((n(2)/2000)-1))/(pi*((n(2)/2000)-1)))^2)*n(4)-0.59;
((sin(pi*((n(1)/2500)-1))/(pi*((n(1)/2500)-1)))^2)*n(3)+ ((sin(pi*((n(2)/2500)-1))/(pi*((n(2)/2500)-1)))^2)*n(4)-0.64;
((sin(pi*((n(1)/3000)-1))/(pi*((n(1)/3000)-1)))^2)*n(3)+ ((sin(pi*((n(2)/3000)-1))/(pi*((n(2)/3000)-1)))^2)*n(4)-0.655;
((sin(pi*((n(1)/3500)-1))/(pi*((n(1)/3500)-1)))^2)*n(3)+ ((sin(pi*((n(2)/3500)-1))/(pi*((n(2)/3500)-1)))^2)*n(4)-0.64;
((sin(pi*((n(1)/4000)-1))/(pi*((n(1)/4000)-1)))^2)*n(3)+ ((sin(pi*((n(2)/4000)-1))/(pi*((n(2)/4000)-1)))^2)*n(4)-0.59;
((sin(pi*((n(1)/4500)-1))/(pi*((n(1)/4500)-1)))^2)*n(3)+ ((sin(pi*((n(2)/4500)-1))/(pi*((n(2)/4500)-1)))^2)*n(4)-0.50;
((sin(pi*((n(1)/5000)-1))/(pi*((n(1)/5000)-1)))^2)*n(3)+ ((sin(pi*((n(2)/5000)-1))/(pi*((n(2)/5000)-1)))^2)*n(4)-0.39;
abs(n(3));
abs(n(4));
n(3)+n(4)-1];
end
I am receiving this error everytime
Index exceeds the number of array elements (1).
Error in multiroo2d>roo2d (line 13)
F=[((sin(pi*((n(1)/700)-1))/(pi*((n(1)/700)-1)))^2)*n(3)+
((sin(pi*((n(2)/700)-1))/(pi*((n(2)/700)-1)))^2)*n(4)-0.31;
Error in multiroo2d (line 6)
y = cell2mat(arrayfun(@roo2d, N, 'uniform', 0));

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