MATLAB: How can I draw this loop

hysteresis

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 ?

Best Answer

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?
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