MATLAB: ERROR: Undefined function ‘sum’ for input arguments of type ‘cell’. Kindly help me resolve the error.

Question

ERROR:

Undefined function 'sum' for input arguments of type 'cell'.

Error in PSCCandPSSCoptiWdVss (line 45)

p=sum(arrayfun(@(x) x*wdwd, 1:2*N, 'un', 0));

CODE:

clear all;

close all;

d=1;

f=9*10^6;

w=2*pi*f;

u=4*pi*(10^-7);

N=15

%ro=1.72*(10^-8); %copper

ro=0.0005 % Resistance

dout=0.15

t=0.000035

wd=[0.005 0.006 0.007 0.008]

s=[0.006 0.007 0.008 0.009]

%Saad Mutasgar

[wdwd,ss]=meshgrid(wd,s);

C1=1

C2=2.46

C3=0

C4=0.2

din=dout-(2*N*wdwd)-((2*N-2)*ss)

rout=dout/2

rin=din/2

U=2;

phi=(dout-din)/(dout+din)

davg=0.5*(dout+din)

L0=((C1.*u.*N.*N.*davg)./2).*(log(C2./phi)+(C3.*phi)+(C4.*phi.*phi))

M_cir=((u.*N.*(dout.^2).*N.*(dout.^2).*pi)./(2.*sqrt(((dout.^2)+(d.^2)).^3)))

syms x

p=sum(arrayfun(@(x) x*wdwd, 1:2*N, 'un', 0));

q=sum(arrayfun(@(x) x*ss, 1:((2*N)-1)))

Answer 1

Use

p = cellfun(@sum,arrayfun(@(x) x*wdwd, 1:2*N, 'un', 0),'un',0) ; 

instead:

p=sum(arrayfun(@(x) x*wdwd, 1:2*N, 'un', 0));

As the output is cell...you need to use cellfun like arrayfun.