In the given program it is not saving the ls value and is not giving plot, what do i need to do for it?

if true
 clear all;
kn=100;
W=360*(10^(-9));
L=180*(10^(-9));
beta=kn*W/L;
Vth=1;
lambda=1/1000;
vds=0:0.5:10;
vgs=input('ENTER THE Vgs in volts');
m=length(vds);
lsvals = [2 3 4 5 6 7];n=length(lsvals);
a=1;
for i=1:m
  gm(i)=(lambda/2)*kn*(vgs-Vth)^2;
if(a<=n)
ls = lsvals(a);
a=a+1;
end
end
plot(ls(1,:),gm)
end

[ES]

You do not get a plot because, ls is a double number. ls(1,:) is also so. What equation do you want to model exactly?

[ARTI]

Atually the plot is a variation of ls and gm. the formulae of gm is given and ls is varying from 2nm to 5nm......