Index exceeds the number of array elements (1).

Can anybody please help why I am getting this error. I am unable to figure out what I am doing wrong in this code.

I am getting this error [ndex exceeds the number of array elements (1).

Error in trial (line 132)
    xhat(i)= d1+d2*x_rec(i-1)+d3*y_rec(i-1)+d4*x_rec(i-1)*y_rec(i-1)+d5*x_rec(i-1)^2+d6*y_rec(i-1)^2+d7*x_rec(i-1)^2*y_rec(i-1)^2+d8*x_rec(i-1)^2*y_rec(i-1)+d9*x_rec(i-1)*y_rec(i-1)^2+d10*x_rec(i-1)^3+d11*y_rec(i-1)^3+d12*x_rec(i-1)^3*y_rec(i-1)+d13*x_rec(i-1)*y_rec(i-1)^3+d14*x_rec(i-1)^3*y_rec(i-1)^2+d15*x_rec(i-1)^2*y_rec(i-1)^3+d16*x_rec(i-1)^3*y_rec(i-1)^3; 
>> ]

Answer 1

[KSSV]

Repalce with this the for loop.

for i=2:length(x_rec)
    xhat(i)= d1+d2*x_rec(i-1)+d3*y_rec(i-1)+d4*x_rec(i-1)*y_rec(i-1)+d5*x_rec(i-1)^2+d6*y_rec(i-1)^2+d7*x_rec(i-1)^2*y_rec(i-1)^2+d8*x_rec(i-1)^2*y_rec(i-1)+d9*x_rec(i-1)*y_rec(i-1)^2+d10*x_rec(i-1)^3+d11*y_rec(i-1)^3+d12*x_rec(i-1)^3*y_rec(i-1)+d13*x_rec(i-1)*y_rec(i-1)^3+d14*x_rec(i-1)^3*y_rec(i-1)^2+d15*x_rec(i-1)^2*y_rec(i-1)^3+d16*x_rec(i-1)^3*y_rec(i-1)^3;
end

[Heya :)]

Thank you for the response. Now, its giving me this error.

Unrecognized function or variable 'xhat'.

Error in trial (line 132)

PE_x(count)=PE_x(count)+(xhat(i)-x(i))^2;

Answer 2

[Alan Stevens]

You should put

x_rec = zeros(1000,1);
y_rec = zeros(1000,1);

just before

x_rec(1)=x(1);
y_rec(1)=y(1);

[Heya :)]

Thank you !