running m file from command window

i have this code for bisection method to calculate smallest root

    %     if true
  function[x,e]=MyBisect(f,a,b,n)

%Does n iterations of the bisection method for a function f.
%Inputs f--Inline function
 %     a,b--Left and Right edges of interval
  %     n-- no.of bisections to do
%Outputs x--estimated solution of f(x)=0
 %       e--An upper bound on error

format long
c=f(a);d=f(b);
if c*d>0.0
error('Function has same signs')
end
disp(' x  y')
for i=1:n
x=(a+b)/2;
y=f(x);
disp([ x  y])
if y==0.0
e=0;
break
end
if c*y<0
b=x;
else
a=x;
end
e=(b-a/2);      % code
    endcode
  end

i dont know how to run it from command window

f is equation of which to find the root eg(x-3-cosx)

a and b value is 1 and 2 resp

n no of iterations

Answer 1

[Wayne King]

Just save your function MyBisect.m in a folder that either already is on the Matlab path, or save it in a folder, and then add that folder to the Matlab path with

   >>addpath 'path/to/folder'

or use pathtool

For example, assume that you are using Windows and that you create a folder called mfiles. Save MyBisect.m in that folder and then enter

   >>addpath 'c:\mfiles'

After that command executes, you should be able to enter

   >>which MyBisect

and see that Matlab recognizes the path to the Matlab program.

Now you should be able to call it from the command line with the syntax:

   [x,e]=MyBisect(f,a,b,n)