MASK modulation problem (HELP!)

clc

data=get(handles.txt1,'String');
%data=[1 0 1 1 0];
rbt2ASK=get(handles.rb2ASK,'Value');
data=str2num(data);
t=0:2*pi/99:2*pi;
cp=[];sp=[];
mod=[];mod1=[];bit=[];
at=[];
ft=0;
phit=0;
fs=1200000;
fc=150000;
i=[];
teta=[0:95];
i=[1:96];
    ft=fc;
    phit=0;%phi teta
for n=1:length(data);
    if data(n)==0; 
        die=ones(1,100);
        se=zeros(1,100);
    else 
        die=1.5*ones(1,100);
        se=ones(1,100);    
    end
    c=(0.8*teta+0.2).*cos(2*pi*ft.*i/fs+phit);% the problem is right here! :( i used above equation for 2ASK but this is not working
    cp=[cp die];    
    mod=[mod c];    
    bit=[bit se];
end
    ask=cp.*mod;
    axes(handles.axes1)
    plot(bit,'LineWidth',1.5);grid on;
    axis([0 100*length(data) -2.5 2.5]);
    xlabel('Zaman (s)');
    ylabel('Damane');
    legend('input Signal m(t)');  
if rbt2ASK==1
    i=[1:96];
    ft=fc;
    phit=0;
    teta=[0:95];
    set(handles.txtinfo,'string','2ASK has been selected');
    %at=(0.8*teta+0.2).*cos(2*pi*ft.*i/fs+phit);
    axes(handles.axes2);
    plot(ask,'LineWidth',1.5);grid on;
    title('2ASK modulation');
    axis([0 100*length(data) -2.5 2.5]); 
end