slp error matlab function

I have error on my code.This slp method to minimize function

clear;
clc;
x=[1;1];
dxlb=[-1;-1];
dxub=[1;1];
Tolx=0.01;
TolCon=0.01;
[f,g]=f_SLPclass(x);    
[gradf,gradg]=g_SLPclass(x);
coverged=false;
iter=0;
while converged 
    c=gradf';
    a=gradg';
    b=-g;
    dx=linprog(c,a,b,[],[],dxlb,dxub);
    x=x+dx;
    [f,g]=f_SLPclass(x);
    [gradf,gradg]=g_SLPclass(x);
    iter=iter+1;
    converged=max(abs(dx)<Tolx)&& max(g)<TolCon;
end 
fprintf('\n number of iteration	%f\n',iter);
fprintf('\n Optimum Point: (%f,%f,%f,%f,%f)\n',x1,x2,x3,x4,x5);

[Matt J]

What error?

[Ous Chkiri]

Error using SLP>f_SLPclass

Too many output arguments.

Error in SLP (line 8)

[f,g]=f_SLPclass(x);

Answer 1

[Matt J]

Your functions f_ and g_SLPclass have missing parts.

function [f,g]=f_SLPclass(x) %return outputs

  assert(length(x)==5, "x should be 5 elements long, but instead it is length " + length(x));
  
  xcell=num2cell(x);
  [x1,x2,x3,x4,x5]= deal(xcell{:});

  f=0.0624*(x1+x2+x3+x4+x5);
  g=-1+61/x1^3 +37/x2^3 +19/x3^3 +7/x4^3 +1/x5^3;
  
end

[Ous Chkiri]

same error : Error

using SLP>f_SLPclass (line 28)

x should be 5 elements long, but it is only length 2

Error in SLP (line 8)

[f,g]=f_SLPclass(x);

[Matt J]

It is not the same error message.

[Ous Chkiri]

clear;

clc;

x=[1;1];

dxlb=[-1;-1];

dxub=[1;1];

Tolx=0.01;

TolCon=0.01;

[f,g]=f_SLPclass(x);

[gradf,gradg]=g_SLPclass(x);

coverged=false;

iter=0;

while converged

c=gradf';

a=gradg';

b=-g;

dx=linprog(c,a,b,[],[],dxlb,dxub);

x=x+dx;

[f,g]=f_SLPclass(x);

[gradf,gradg]=g_SLPclass(x);

iter=iter+1;

converged=max(abs(dx)<Tolx)&& max(g)<TolCon;

end

fprintf('\n number of iteration %f\n',iter);

fprintf('\n Optimum Point: (%f,%f,%f,%f,%f)\n',x1,x2,x3,x4,x5);

function [f,g]=f_SLPclass(x) %return outputs

assert(length(x)==5, "x should be 5 elements long, but instead it is length " + length(x));

xcell=num2cell(x);

[x1,x2,x3,x4,x5]= deal(xcell{:});

f=0.0624*(x1+x2+x3+x4+x5);

g=-1+61/x1^3 +37/x2^3 +19/x3^3 +7/x4^3 +1/x5^3;

end

function [gradf,gradg]=g_SLPclass(x)

assert(length(x)==5, "x should be 5 elements long, but it is only length " + length(x));

xcell=num2cell(x);

[x1,x2,x3,x4,x5]= deal(xcell{:});

gradf=0.312;

gradg=-183/x1^4 - 111/x2^4 -57/x3^4 -21/x4^4 -3/x5^4;

end

[Ous Chkiri]

I just run it and it gives me the same error :

Error using SLP>f_SLPclass (line 28)

x should be 5 elements long, but instead it is length 2

Error in SLP (line 8)

[f,g]=f_SLPclass(x);

[Matt J]

That is not the same error message as the one you posted here,

https://www.mathworks.com/matlabcentral/answers/765806-slp-method-to-minimize-function#comment_1376576

[Ous Chkiri]

Yes your right Sorry. It gives another error