got an error while evaluating the value from equation.

while writing the equation for velocity vel=C*(w*vel+c1*r1*(localpar-par)+c2*r2*(ones(popsize,1)*globalpar-par)); I got an error.Please suggest me the correct form to write any equation.

[Roger Stafford]

You need to show what the matlab error message says and perhaps also tell us which of your variables are scalars and the sizes of any arrays involved in your expression. Also what is the value of 'popsize'?