it is showing not enough input arguments

function out = g(x1 , x2)
out = x1 * x2 - 1140;

function [dGdX1 dGdX2] = dGdX(x1 , x2)
dGdX1 = x2 ;
dGdX2 = x1 ;
clc ;
clear ;
close a l l ;
format short g ;
% −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− %
mu_x1 = 38;
sigma_x1 = 3.8;
mu_x2 = 54;
sigma_x2 = 2.7;
x1 = mu_x1
x2 = mu_x2
[dg_dx1 dg_dx2] = dGdX(x1 , x2 ) ;
g_ = g(x1 , x2)
beta = g_ / sqrt (( dg_dx1 * sigma_x1)^2 + (dg_dx2 * sigma_x2)^2)
alpha_1 = -dg_dx1 * sigma_x1 / sqrt (( dg_dx1 * sigma_x1)^2 +...
(dg_dx2 * sigma_x2 )^2);
alpha_2 = -dg_dx2 * sigma_x2 / sqrt (( dg_dx1 * sigma_x1)^2 +...
(dg_dx2 * sigma_x2 )^2);
u1 = beta * alpha_1 ;
u2 = beta * alpha_2 ;
x1 = mu_x1 + u1 * sigma_x1
x2 = mu_x2 + u2 * sigma_x2
epsilon = 1.0;
while epsilon > 1E-3
g_ = g(x1 , x2)
[dg_dx1 dg_dx2] = dGdX(x1 , x2 ) ;
beta_old = beta ;
beta = (g_ - dg_dx1 * sigma_x1 * u1 - dg_dx2 * sigma_x2 * u2 )...
/ sqrt (( dg_dx1 * sigma_x1)^2 + (dg_dx2 * sigma_x2)^2)
epsilon = abs( beta - beta_old ) / beta_old
alpha_1 = -dg_dx1 * sigma_x1 / sqrt (( dg_dx1 * sigma_x1)^2 +...
(dg_dx2 * sigma_x2 )^2);
alpha_2 = -dg_dx2 * sigma_x2 / sqrt (( dg_dx1 * sigma_x1)^2 +...
(dg_dx2 * sigma_x2 )^2);
u1 = beta * alpha_1 ;
u2 = beta * alpha_2 ;
x1 = mu_x1 + u1 * sigma_x1
x2 = mu_x2 + u2 * sigma_x2
end

can any one help?

[Azzi Abdelmalek]

What is the aim of assigning variables then clearing them?

dGdX1 = x2 ;
dGdX2 = x1 ;
clc ;
clear

[Jan]

"close a l l ;"? Do you mean "close all;" without magic spaces?

You forgot to post the complete error message. Most of all the line, which causes the error, would be a useful information.

Answer 1

[Kuifeng]

 %Remove the following lines from the code 
clc ;
clear ;
close a l l ;

[vaibhav mohadikar]

Thank you but its still keep saying that not enough input arguments in line 2.

[Walter Roberson]

And lucky for you that it did, as otherwise your code would recurse infinitely. You invoke [dg_dx1 dg_dx2] = dGdX(x1 , x2 ) ; within your dGdX code, so it would go back and start the routine all over again, and hit that line and go back and start the routine all over again, and so on.