how can I plot graphs of function with various input arguments?

Question

hyunmin 2014-2-28

评论： hyunmin 2014-2-28

mfunction.m

      function[P] = mfunction(v,M,R,T)
      P=4*pi*(M/(2*pi*R*T)).^(3/2)*v.^2*exp((-M*(v.^2))/(2*R*T));
      end

I want to make a graph. x would be v and the range is 1: 1200,

M = 0.032,R = 8.31, T= 300

and I want to plot " y=mfunction(x)"

and errors pop up.

??? Error using ==> mtimes Inner matrix dimensions must agree.

Error in ==> mmfunction at 2 P=4*pi*(0.032/(2*pi*8.31*300)).^(3/2)*x.^2*exp((-0.032*(x.^2))/(2*8.31*300));

How can I draw a graph?

please help me

Answer 1

Chandrasekhar 2014-2-28

Hi, use the below script to plot the graph. I think this is what you are looking for,

for v = 1:1200
    Y(v,1) = mfunction(v,0.032,8.31,300);
    X(v,1) = v;
end
plot(X,Y)

hyunmin 2014-2-28

Thank you! Thank you so much!!