MATLAB: Dont Know , What is error. It shows busy

dont know reasonerror

The Program is

fun=@(x)cos(x)-1.3*x;
x1=input('Enter The Value of Initial Guess x1 = ');
x2=input('Enter The Value of Initial Guess x2 = ');
acc=input('Enter Accuracy Criteria = ');
y1=fun(x1);
y2=fun(x2);
while(y1*y2>0)
    x1=input('Enter The Value of Initial Guess x1 = ');
    x2=input('Enter The Value of Initial Guess x2 = ');
    y1=fun(x1);
    y2=fun(x2);
end
while(abs(x2-x1)>acc)
    x3=x1+x2/2;
    y3=fun(x3);
        if(y1*y3<0)
            x2=x3;
            y2=y3;
        else
            x1=x3;
            y1=y3;
        end
end
fprintf('The Root of Equation is %f ',x3);

after running program and giving input , it shows nothing :

and fun=@(x)cos(x)-1.3*x; also tried fun=inline('(cos(x)-1.3*x)');

but no result …

Best Answer

x3=x1+x2/2;

is wrong. It does not take the value half-way between the two. It can get stuck. Consider that if x1 = 1 and x2 = 2, then 1 + (2/2) = 1+1 = 2, so your x3 would be the same as your x2 and you would get stuck in an infinite loop.

Related Solutions

MATLAB: I have a problem with the nested function.

Multiple functions way:

x1=input('Enter the x coordinate of the first point ');
y1=input('Enter the y coordinate of the first point ');
x2=input('Enter the x coordinate of the second point ');
y2=input('Enter the y coordinate of the second point ');
x3=input('Enter the x coordinate of the third point ');
y3=input('Enter the y coordinate of the third point ');
[a,b,c]=dist(x1,x2,x3,y1,y2,y3)                         %first function call
s=(a+b+c)/3;
area=calcarea(a,b,c,s)                                  %second function call
fprintf('The area of the triangle is %.2f\n',area) 
function [a,b,c]=dist(x1,x2,x3,y1,y2,y3)   
a=sqrt((x1-x2)^2 + (y1-y2)^2);
b=sqrt((x1-x3)^2 + (y1-y3)^2);
c=sqrt((x2-x3)^2 + (y2-y3)^2);
end
function area=calcarea(a,b,c,s)
area=sqrt(s*(s-a)*(s-b)*(s-c));
end

nested function way:

x1=input('Enter the x coordinate of the first point ');
y1=input('Enter the y coordinate of the first point ');
x2=input('Enter the x coordinate of the second point ');
y2=input('Enter the y coordinate of the second point ');
x3=input('Enter the x coordinate of the third point ');
y3=input('Enter the y coordinate of the third point ');
area=calcarea(x1,x2,x3,y1,y2,y3)                        %parent function call
fprintf('The area of the triangle is %.2f\n',area) 
 function [area]=calcarea(x1,x2,x3,y1,y2,y3)     %parent function
 [a,b,c]=dist(x1,x2,x3,y1,y2,y3) 
 s=(a+b+c)/3;
 area=sqrt(s*(s-a)*(s-b)*(s-c));
 function [a,b,c]=dist(x1,x2,x3,y1,y2,y3)       %nested function
 a=sqrt((x1-x2)^2 + (y1-y2)^2);
 b=sqrt((x1-x3)^2 + (y1-y3)^2);
 c=sqrt((x2-x3)^2 + (y2-y3)^2);
 end
 end

MATLAB: How to store output values in a matrix for each output variable

Initialize another variable say X3 as X3 = []

Then use X3 to store x1 and g(x) values

Modify this portion of code as

X3 = [];
x1=input('\n enter initial value:-');
acc=input('\n enter accuracy:-');
n=input('\n itterations:-');
X3 = [X3 x1];
while (dg(x1)>1)
    x1=input('\n enter initial value:-');
    X3 = [X3 x1];
 end

Then other changes in below portion of Code

 if abs(x2-x1)>acc
        x1=x2;
        X3 = [X3 x1];
    else
        fprintf('\n root is %f',x2');
        X3 = [X3 x2];
        break;
    end

Best Answer

Related Solutions

MATLAB: I have a problem with the nested function.

MATLAB: How to store output values in a matrix for each output variable

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