can anybody tell me whats wrong with this program?

kn=1e-3;
vt=1.5;
vds=0:0.5:12;
vgs=4:2:8;
m=length(vds);
n=length(vgs);
for i=1:n
for j=1:m
if vgs(i) < vt
cur(i,j)=0;
elseif vds(j) >= (vgs(i) - vt)
cur(i,j)=kn * (vgs(i) - vt)^2;
elseif vds(j) < (vgs(i) - vt)
cur(i,j)= kn*(2*(vgs(i)-vt)*vds(j) - vds(j)^2);
end
end
end
plot(vds,cur(1,:),'w',vds,cur(2,:),'w',vds,cur(3,: ),'w')
xlabel('Vds, V')
ylabel('Drain Current,A')
title('I-V Characteristics of a MOSFET')
text(6, 0.009, 'Vgs = 4 V')
text(6, 0.023, 'Vgs = 6 V')
text(6, 0.045, 'Vgs = 8 V')

i m unable to run this program on MATLAB. its showing errors.

[Andreas Goser]

I can run this code without errors - looks like you should provide the error message...

[MOUMITA]

thanks Andreas. will provide d error msg.

Answer 1

[the cyclist]

The program runs fine for me.

In your plot command, you chose to plot all your lines in white, so they do not show up against the white plot background. Choose another plotting color.

[MOUMITA]

thanks, will make d correction.

[Andreas Goser]

The cyclist was effective - I was efficient :-)

I am still curious about the error message.

[the cyclist]

If this answer did, in fact, help resolve your issue, you should consider "accepting" it for the benefit of future readers.

[Jan]

@Cyclist: But the errors are still unclear.