Getting the data from events in ode 113

I created the following events function to terminate the integration at dot product sign change

function [value,isterminal,direction] = terminator(t,yy)

    jed = mjd20002jed(t);
    ncent = 12;
    kmflag = 0;
    inc =  deg2rad(23+26/60+21.448/3600);
    [rr, vv] = body(jed, 3, ncent, kmflag);

    rrE = equ2ecl(rr, inc);
    vvE = equ2ecl(vv, inc);

    A = yy(1) - rrE(1);
    B = yy(2) - rrE(2);
    C = yy(3) - rrE(3);
    D = yy(4) - vvE(1);
    E = yy(5) - vvE(2);
    F = yy(6) - vvE(3);
    T_1 = [A, B, C];
    T_2 = [D, E, F];

    d_term = dot(T_1, T_2);

    value = [d_term];
    isterminal = 1;         
    direction  = 1;         

end

However now I want to use the first value of yy(4:6) that enters in the event function to be used instead of the current value. Is there any way to capture that inside a variable. I tried looping but since the program executes completely the counter resets everytime. Any ideas how to proceed

[Bruno Pop-Stefanov]

What do you mean by using the first value that enters the function? Could you describe a bit more what the counter you are mentioning is?

I am not sure what you would like to do but you can use persistent variables to capture a state between several executions of a function:

http://www.mathworks.com/help/matlab/ref/persistent.html

[Divas]

The input variable for this integration starts from variables from previous integration which I terminated at some given condition.

This value enters first in 'yy' when the events function is called from the second integration, and I want to use that to compute the difference between that value and the values that are being generated following the integration.

If I use a variable to store that data, it gets overwritten with each call of events function. Although I'll give it a try using persistent variable

********Edit********

Persistent does the job. Thanks a lot.