Unable to store data in while loop to plot

I am trying to display a smooth graph/plot of the position over time, but I cannot for the life of me figure out how to store the values in order to display the data from he loop. here is the code:

%%Initialized Conditions
clear all;close all;clc;
g = 32.2 ./6; %gravity constant in ft/s^2
h = randi([1000 10000],1); %initial height
v = randi([-100 -40],1); %initial velocity
weight = 2500; %lbs
mass = weight./g; %craft mass (tons/gravity)
playing_flag = 1;
t = 0; %time elapsed in seconds
dt = 1; %time interval in seconds
vmax = 7; %max successful landing speed in ft/s

%%Introduction
fprintf('You are in a %.0f lb spacecraft\n',weight);
fprintf('Try to land with a speed of less than %.0f ft/s\n',vmax);

%%Game loop until done
while playing_flag==1
    %%current position and velocity
   fprintf('\nTime:%3.0f sec, Altitude: %6.1f ft, Velocity: %5.1f ft/s\n',t,h,v);
    %%user input
    input_flag = 1;
    while input_flag==1
        fprintf('<strong>Please enter a vertical thrust value.</strong>\n');
        thrust = input('*Thrust input must be between -10 and 10(k-lbs/s)* ');
        if isempty(thrust)
            thrust = 0;
        end
        if abs(thrust)<=10
            input_flag=0;
        else
            fprint('Invalid input. Thrust must be between -10 and 10\n');
        end
    end
    %%calculate new values
    a = -g + thrust*1000./mass;

      %time to hit the ground from current position
      %if it is less than dt, use it
      thit=roots([a./2 v h]);
      if length(thit)>=1 && isreal(thit(1)) && thit(1)>0 && thit(1)<dt
          dt=thit(1);
      end
      if length(thit)>=2 && isreal(thit(2)) && thit(2)>0 && thit(2)<dt
          dt=thit(2);
      end

      h = h + v.*dt + a./2.*dt.*dt;
      v = v + a.*dt;
      t = t + dt;

      %%check if landed
      if abs(h)<=0.1
          playing_flag = 0;
          if abs(v)<vmax
              msg = 'Successful landing!';
          else
              msg = 'Houston, we have a problem. Spacecraft down.';
          end
          fprintf('%s \nYou landed with a velocity of %.1f ft/s\n',msg,v);
      end
  end

pause