This statement is not inside any function. (It follows the END that terminates the definition of the function "trap_wfp610".)

%% function [ w ] = trap_wfp610( n ) % Calculates the work done using numerical integration and the trapezoidal rule % Detailed explanation goes here h=(5*10^-2)/n; a=0; b=5*10^-2; f=@(a)(5*(10^5)*a+10^5)*pi*(5*10^-2)^2; g=@(b)(5*(10^5)*b+10^5)*pi*(5*10^-2)^2; w=h/2*(f(a)+g(b)); end

%% syms x k1=500000 k2=10^5 p=(k1*x+k2)*pi*.05^2 W=int(p,x,0,5*10^-2)

%% error=abs((w-W)/W)*100

Answer 1

[Mischa Kim]

Kevin, it's hard to tell what exactly you would like to do and what is going wrong. One thing you could do is do both computations within the same function and return all results:

 function [ w,Ws,error ] = trap_wfp610( n )
 % Calculates the work done using numerical integration and the trapezoidal rule
 % Detailed explanation goes here
 h = (5*10^-2)/n;
 a = 0;
 b = 5*10^-2;
 f = @(a)(5*(10^5)*a+10^5)*pi*(5*10^-2)^2;
 g = @(b)(5*(10^5)*b+10^5)*pi*(5*10^-2)^2;
 w = h/2*(f(a)+g(b));

 syms x 
 k1 = 500000 
 k2 = 10^5 
 p  = (k1*x+k2)*pi*.05^2 
 Ws = int(p,x,0,5*10^-2)

 error = abs((w-Ws)/Ws)*100;
 end

[kevin]

When I run this code under one function it says that there aren't enough input arguments.

[Mischa Kim]

Have you assigned a value to n? In other words try

 [ w,Ws,error ] = trap_wfp610( 3 )

or

 n = 3;
 [ w,Ws,error ] = trap_wfp610( n )

in the MATLAB command window.

[kevin]

That does it Thank you