When I plot, I only get 5 red dots and a blank graph.

if true
}
clc
clear all
L = 5;
D = 3;
d = 1;
t = 0.1;
w = 500;
x = linspace(0, 1, L);
di = (x./L) * ( d - D) + D;
do = D + d - di;
VR = do / di;
plot(x , VR , 'b');
}
end

i'm new to Matlab, but the graphing procedure sounds really convoluted. I want for 'x' to be my horizontal axis and for VR to be my vertical axis. The graph should look something like a trapezoid if I did my math correct but I can't tell because it won't print the graph. I used '(x./L)' because I read that that makes it a vector, but it didn't change anything with or without it.

Answer 1

[Roger Stafford]

You should make two changes:

   x = linspace(0, 1, w); (or just linspace(0,1) and get the default hundred points)

   VR = do ./ di; (You left out the dot)

Answer 2

[jeremy morgan]

Oh! that changes everything. Yes I see now why the "./" should be there instead of where I put it. I'll admit, I was guessing and focusing more on the "x" part of my equation rather than the equation itself. Thank you!

[Image Analyst]

Jeremy, you should have put this as a comment to Roger, rather than as a new Answer to your original question. Also, please vote for his answer and "Accept" it so he gets reputation points for it.