Re: what dose this error mean -- urgency

no one cant answer me??????????????/
"maia " <antonietta.arista@yahoo.com> wrote in message <kdtquo$og5$1@newscl01ah.mathworks.com>...
> hi every one
>
> when i write this program it give me this eroor
>
> why?
> and what i should do to solve it
>
> thank you
>
>
> --------------------------------------
> error
> --------------------------------------
> ??? Error using ==> char
> Cell elements must be character arrays.
>
> Error in ==> ezplot at 158
> fmsg = char(f);
>
> Error in ==> sym.ezplot at 45
> h = ezplot(char(f));
>
> Error in ==> test7 at 33
> ezplot(pin10);
>
> ------------------------------------------
>
> code
>
> ------------------------------------------
>
> close all
> clear
> clc
> re=0.5;
> syms k r n t
> s=k*r;
> m=k*re;
> eps=70/9600;
>
> %*************************************
> %for n=1
> %*************************************
> pin1= besseli(1,s);
> pin11=besselk(1,m);
> pin14=pin1*pin11;
> pin12=((1-eps)*besseli(1,m)*besselk(1,k)*diff(besselk(1,k)));
> pin13=1/(eps*diff(besselk(1,k))*besseli(1,k)-besselk(1,k)*diff(besseli(1,k)));
> pin17=pin13*pin12;
> pin18=2*pin14*pin17;
> pin19=cos(t);
> pin10=pin18*pin19;
> ezplot(pin10);
>
> %*************************************
>
>
> thank you again