# MATLAB: Error using plot vectors must be the same length

errorvectors

Why i am getting this error in plot (Data, hx,) and how to fix it?
This is my code
``for i=2:test_points  x_rec(i)=c1+c2*x_rec(i-1)+c3*hx(i-1)+c4*x_rec(i-1)*hx(i-1)+c5*x_rec(i-1)^2+c6*hx(i-1)^2+c7*x_rec(i-1)^2*hx(i-1)^2;  hx(i)=d1+d2*x_rec(i-1)+d3*hx(i-1)+d4*x_rec(i-1)*hx(i-1)+d5*x_rec(i-1)^2+d6*hx(i-1)^2+d7*x_rec(i-1)^2*hx(i-1)^2;  x_real(i)=x(start_point+i-1);  error=error+(x_rec(i)-x_real(i))^2;  DN=DN+x_real(i)^2;endError_x(count)=sqrt(error)/sqrt(DN);endfigurehold onplot (Data,Error_x,'s-r')plot (Data,hx,'s-b')``
This is the error
``Vectors must be the same length.Error in PE_HT (line 136)plot (Data,hx,'s-b')``

``for i=2:test_points  x_rec(i)=c1+c2*x_rec(i-1)+c3*hx(i-1)+c4*x_rec(i-1)*hx(i-1)+c5*x_rec(i-1)^2+c6*hx(i-1)^2+c7*x_rec(i-1)^2*hx(i-1)^2;  hx(i)=d1+d2*x_rec(i-1)+d3*hx(i-1)+d4*x_rec(i-1)*hx(i-1)+d5*x_rec(i-1)^2+d6*hx(i-1)^2+d7*x_rec(i-1)^2*hx(i-1)^2;  x_real(i)=x(start_point+i-1);  error=error+(x_rec(i)-x_real(i))^2;  DN=DN+x_real(i)^2;  Error_x(i)=sqrt(error)/sqrt(DN);endend``