Why can I not plot two simple vectors? Matlab keeps returning "too many input arguments" Help!

function [t,y] = Euler(h)

% Simple Euler integration method for the Ordinary Differential Equation

%

%  dy/dt = f(t,y),    initial condition: y(1) [see below]

%

% with stepsize h. t and y are vector-valued outputs for the solution

% y at time t.

Tmax = 1; % final time

f = @(t,y) -3.*y;

y(1) = 1;

t = [0:h:Tmax]; % h is the stepsize: make sure Tmax is divisible by h!

for i=1:length(t)-1

      y(i+1) = y(i) + h*f(t(i),y(i));

end

figure

plot(t,y)

end

Answer 1

[the cyclist]

I saved your code to a file named Euler.m, and then called it with

Euler(0.1)

and it ran just fine. Is that what you are doing?

What is the output of

which Euler

?

Maybe you defined Euler as both a variable and a function?

[Cole Hayden]

This is what it gave me when I input what you suggested.

>> which Euler

/Users/****/Downloads/Euler.m (this is my folder containing the file)

>> [t,y] = Euler(0.1)

Error using plot

Too many input arguments.

Error in Euler (line 20)

plot(t,y)

I have a feeling it has something to do with my computer. I've had this problem before. I'm using a code provided that worked in the computer labs on campus. But for some reason the same code on my personal computer is returning this error? Do you have any suggestions? Maybe my pathway or folder or something...? Thanks

Answer 2

[Cole Hayden]

Actually, turns out I had a file on my computer called "plot.m"......... -____- thanks for your help though. Your suggestion kind of got me thinking if I had a function of that sort.