How to plot fourier sin series

Hi Folks,

I have a column of amplitudes d_n and frequencies Omega both from 1 to 664.

1) How to i create the series? I have attempted V_x=sum(d_n.*cos(Omega.*x)) (which generated all the sin terms with values of d_n and Omega, however I cannot repeat this now for some reason) but then when I attempted to plot, I got error message stating

"cannot convert from syms to double"

2) Then plot the series in sysmbolic mode?

Any information will be appreciated. Regards

[Star Strider]

deltanabla’s ‘Answer’ moved here:

For example if both the vector d_n and Omega have 2 numerical entries, what is the syntax to automatically write

A cos (b x)+ C cos(d x)

and then plot this...?

Thanks