How can this probability function be entered?

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Matthew Nanos
Matthew Nanos 2015-3-8
评论： Star Strider 2015-3-9
I'm very new to matlab. I want to take this equation and use matlab to graph it:
I used this code
The variable P is created but it has a value for the first element, then all zeros.

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采纳的回答

Star Strider
Star Strider 2015-3-8
You have to vectorise your assignment for ‘P’:
k = 1.3806488E-23;
e = 6.0217657E-19;
z = 2;
Vh = 1E-3;
T1 = 25+273.15;
T2 = 37+273.15;
V = linspace(-0.1, 0.09);
VV = V-Vh;
P = 1./(1+exp(-z*e*(VV/(k*T1))));
figure(1)
plot(V, P)
grid
See Matrix vs Array Operations for details.

更多回答（1 个）

Greig
Greig 2015-3-8
Change P to
P = (1./(1+exp(-z*e*(VV/(k*T1)))));
Since the (1+exp(..)) is a vector you have to use array division (./)

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