matrix decision

I'm trying to write a simple code, but I get error "Error Using==> mldivide" "Matrix dimensions must agree".....

what am i doing wrong?:

d=1000:1:20000;

y1=14400/d;%estimation

y2=(0.0001759/(d^2))*(2-2*cos(9046/d));%exact

plot(d,y1,'r');

hold on;

plot(d,y2);

Answer 1

[David Young]

I think you need

y1=14400./d;%estimation
y2=(0.0001759./(d.^2)).*(2-2*cos(9046./d));

but I see this gives a very big difference between y1 and y2 so I'm not sure if it's entirely right.

[Daniel]

thanks, actually this solution worked just fine.

-Lee