how can I draw this loop ?

hey guys, I have to draw a hysteresis loop like this

http://www.doitpoms.ac.uk/tlplib/ferroelectrics/images/img011.gif

I have values of the loop. for example;

a=[48 52 58 73 85 103 135 193 80 42 2 -18 -29 -40 -45 -48]

b=[0 0.2 0.4 0.6 0.7 0.8 0.9 1 0.95 0.9 0.8 0.7 0.6 0.4 0.2 0]

how can I draw this loop ?

Answer 1

[sixwwwwww]

try this:

a = [48 52 58 73 85 103 135 193 80 42 2 -18 -29 -40 -45 -48];
b = [0 0.2 0.4 0.6 0.7 0.8 0.9 1 0.95 0.9 0.8 0.7 0.6 0.4 0.2 0];
a = [a, -a];
b = [b, -b];
plot(a, b)

it gives

do you need this?

[murat]

excuse me I had an important error thank you very much

Answer 2

[Andrei Bobrov]

plot([a,-a],[b,-b]);

[murat]

thank you but it does not resemble this:

http://www.doitpoms.ac.uk/tlplib/ferroelectrics/images/img011.gif

Answer 3

[Omair]

plot(a,b)
hold on
plot(-a,-b)

[murat]

unfortunately same result :(

[Omair]

This is what i get when i execute the above command.

[murat]

excuse me I had an important error thank you very much