How can i solve the Too many output arguments error problem ?

clc
clear
syms x
f=input('\n Enter the function f(x): '); %inline('((x^2)*log(x))')
f=@ (x) (x^2)*log(x)
a=input('Enter lower limit a: '); % for our example a=1
b=input('Enter upper limit b: ');  % for our example b=5
n=input('Enter the  number of sub-intervals n: '); % for our example n=8,16,32
h=(b-a)/n;
Df=diff((x.^2)*log(x),x,4);
if rem(n,2)==1
   fprintf('\n Enter valid n!!!'); 
   n=input('\n Enter n as even number ');
end
so=0;
se=0;
for k=1:1:n-1
    x(k)=a+k*h;
    y(k)=f(x(k));
    if rem(k,2)==1
       so=so+y(k);%sum of odd terms
     else
       se=se+y(k); %sum of even terms
    end
end
% Formula:  (h/3)*[(y0+yn)+4*(y1+y3+y5+..odd term)+2*(y2+y4+y6+...even terms)]
answer=h/3*(f(a)+f(b)+4*so+2*se);
Error=-(((b-a)/180)*(h^4)*(Df))
fprintf('\n The value of integration is %f',answer);
fprintf('\n The value of error is %f',error);

and after the run, error is :

Error using error
Too many output arguments.

Error in compos (line 30)
fprintf('\n The value of error is %f',error);

Answer 1

[Star Strider]

You are overshadowing the error function (although there are also two other error functions in the Statistics and Machine Learning Toolbox that do have outputs).

fprintf('\n The value of error is %f',error);

Error using error
Too many output arguments.

In any event, it should probably be:

Error=-(((b-a)/180)*(h^4)*(Df))
fprintf('\n The value of error is %f',Error);

instead.

.

[Torsten]

... and since "Error" is symbolic, it cannot be printed the way you do.

[Star Strider]

@Torsten — Noted! I missed the syms call.