Storing found values in array

Hello I have a code set to do a bisection method. I need to store the values of a, b, c, x,and y for each iteration of the code so i can make a table and plot them. How would i go about doing that? 

clear; clc;

f=@(x)2 * x^4 +3 * x^3 - 11 * x^2 - 9 * x + 15 ;

a=input('\n Enter left point of interval ');

b=input('\n Enter right point of interval ');

toll= 1e-4;

err=abs(b-a);

c = ( a + b )/2;

if f(a) *f(b) > 0

disp 'Enter valid interval!!!');

else

c = ( a + b) /2;

toll= 1e-4;

err=abs(b-a);

while err > toll

if abs(f(c)) < err

else

c = ( a + b )/2;

x = abs( b - c);

y = abs(f(c));

if ( f(a) * f(c)) <= 0

b = c;

else

if ( f(b) * f(c)) <= 0

a = c;

end

end

end

c = ( a + b) /2;

err = abs(b-a);

end

fprintf( 'The Root is: %4.4f\n', c)

end

Answer 1

[Fangjun Jiang]

I had this example code for answering a similar question. I think you can utilize it as an example for storing while-loop results.

x=100;y=200;
k=0;
result=ones(100,2);
while x>1e-3 && y>1e-4
    k=k+1
    [x,y]=D23(x,y);
    result(k,:)=[x,y];
end
result(k+1:end,:)=[]
function [x,y]=D23(x,y)
x=x/2;
y=y/3;
end