Expression (equation)

6 views (last 30 days)
Jan
Jan on 8 Dec 2011
Hello, how to define an expression, for example 1-e^(-At) where I can define and change parameters A and t and than figure changes of the curve in a graph.
Thanks

Accepted Answer

Paulo Silva
Paulo Silva on 8 Dec 2011
Simplest version I can think of
t=0:0.1:100; % Time vector
A=0.1; % Value of A that you can change
plot(t,1-exp(-A(n)*t)) % Represent it on a figure
If you place the cursor on the value of A you can try several values using the Editor tools (look on the tools of your editor window - 1.0 + ... press those symbols and the script runs with a new value for A)
Just for fun here's a version using subplots
clf
t=0:0.1:10;
A=[0.01 0.1 0 1];
for n=1:4
subplot(2,2,n)
plot(t,1-exp(-A(n)*t))
title(['A=' num2str(A(n))])
end
  9 Comments
Jan
Jan on 8 Dec 2011
thx :)

Sign in to comment.

More Answers (1)

Sean de Wolski
Sean de Wolski on 8 Dec 2011
And to add on to Paulo's example:
t=0:0.1:100; % Time vector
A=0.1;
y = 1-exp(-A*t); % Value of A that you can change
H = figure;
plot(t,y)
linkdata(H,'on');
shg;
pause(2) %watch the magic in 2 seconds
A = .8;
y = 1-exp(-A*t);
if you want it to automagically update when you change A or y.
  3 Comments
Jan
Jan on 8 Dec 2011
Is it possible to model it in the Simulink?

Sign in to comment.

Categories

Find more on Exponents and Logarithms in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by