plot line by matlab

please, who can plot a line by matlab, when I used this steps its pot x,y only.

[Star Strider]

Please copy your code and paste it to your original post or to a Comment here.

My MATLAB version will not run images of code.

[alnawiers Almaliki]

f=2*10^9; % frequency = 2 GHz

c=3*10^8; % light speed

w=c/f % wavelength

n1=10; %number of points for n1 on L1

a=1*w; %Radius the cylinder

L1=1.5*w %lenght

seq1=L1/n1; %The first section

for i=1:n1-1;

for p=1:4;

t(i,p)=i+((p-2.5)/2);

stp=seq1*t(i,p)

if 0<stp<L1

end

plot(i,stp,a)

end

end