how to create or save new workshop file every time finished a loop so that i can do a graph that has multiple line. if not the value will be keep overwritten. Need help to create new workshop file within the loop.

clc 
m=100;
c=1.7;
s=7;
xcm=0.5*c;
xf=0.5*c;
e=xf/c-0.25;
Kk=1.2277e7*2*pi;
Kt=7.2758e5*2*pi;
rhow=1.225;
Mt=-1.2;
Ik=m*s^3*c/3;
Ikt=m*s^2/2*(c^2/2-c*xf);
It=m*s*(c^3/3-c^2*xf+c*xf^2);
aw=2*pi    %assume
i=1  

for Kk=1.2277e4:1e1:1.2277e7;
    %     j=1
    % for V=0:1:200
    %  %preparing matrix for eig solution
    % I=eye(2);
    % Va(i)=V;
    % MA=[Ik Ikt;Ikt It];
    % MCE=[rhow*V^2*[0 c*s^2*aw/4;0 -e*c^2*s*aw/2]+[Kk 0;0 Kt]];
    % MBD=[rhow*V*[c*s^3*aw/6 0;-e*c^2*s^2*aw/4 -c^3*s*Mt/8]];
    % Q=[zeros(2) I;-inv(MA)*MCE -inv(MA)*MBD]
    % 
    % %find lamdar by using eigensolution
    % lamdar=eig(Q)
    % 
    %  for j=1:4
    %     im=imag(lamdar(j)); %separating real and imaginary
    %     re=real(lamdar(j));
    %     ome=sqrt(im^2+re^2);
    %     f(j,i)=ome/(2*pi);
    %     zeta(j,i)=-re/ome; %damping ratio
    %  end 
    %  
    % i=i+1;
    % end 
    % 
    % end

     %my problem is i want to create graph V vs f but with multiple line of f which represent every time of each loop