"Not enough input arguments" plotting a function

(Today is my first day using Matlab.) I've been trying to plot the following function:

function[Rs] = sFn(r)
        Rs = 2.*3^(-3./2).*(1-2.*r./3+2.*r^2/27).*exp(-r./3)
end

with

plot(sFn,r) or plot(Rs,r)

The first yields "Not enough input arguments" and the second "Undefined function or variable Rs". I cannot, for the life of me figure out how this is supposed to work. :( Help.

Answer 1

[Amit]

First define r like

r = 1:10;

Then do the plotting using,

plot(r,sFn(r))

[Amit]

Also if this is your first day with Matlab, I'll suggest 'help' commad. That comes in quite handy during the learning process. Like if you having trouble with 'plot' command,

help plot

will give you a quick reference to plot command. Also, the MATLAB documentation is pretty good too.

Happy Coding!

[Sarah]

Thank you so much! I tried watching tutorials and the help section on plotting, but I didn't realize I needed to write the function as sFn(r).

Answer 2

[manan goel]

x = linspace(-1,1,200);
y = 0.5.*sin.*[sin.*(12.*x)];
plot(x,y)