Graph not plotting at all

I am very unsure of why this does not work. I want to plug in a range of Xa into V equation and plot Xa vs V

k=1; %mol3L-3sec-1
Fa0=1; %molA/sec
v0=1; %L/sec
Ca0=Fa0/v0;

Xa=(0:.05:1);
V=(Fa0-(Ca0*v0*((1-Xa)/(1-(.5*Xa)))))./(-k*((Ca0*((1-Xa)/(1-(.5*Xa)))).^-2));

plot(Xa,V);
xlabel('Conversion');
ylabel('Volume');

Answer 1

[Walter Roberson]

k=1; %mol3L-3sec-1
Fa0=1; %molA/sec
v0=1; %L/sec
Ca0=Fa0./v0;

Xa=(0:.05:1);
V=(Fa0-(Ca0.*v0.*((1-Xa)./(1-(.5*Xa)))))./(-k.*((Ca0.*((1-Xa)./(1-(.5*Xa)))).^-2));

plot(Xa,V);
xlabel('Conversion');
ylabel('Volume');

In short: get in the habit of using ./ instead of / (except perhaps for simple fractions like 2/3 ) . The / function is not element-by-element division: it is "matrix right divide", in which A/B acts similar to A*pinv(B) where * is algebraic matrix multiplication.

[Kara Scully]

thank you so much! i honestly was not sure when to use ./ specifically if it had to be for like every step in the equation but now i know :)