How do I get my code to display the associated x values for maximum and minimum
1 view (last 30 days)
Show older comments
In addition, How do I get it to label the coordinates in the graph it makes? I tried getting it to display Xmax or Xmin, but it says not defined.
a = -7.0;
b = 1.0;
c = 2.0;
d = 20.0;
e = 2.0;
f = 5.0;
p = @(x) c * x.^3 + d * x.^2 + e * x + f;
CP = quadratic(3 * c, 2 * d, e);
crit_pt1 = CP(1);
crit_pt2 = CP(2);
if isreal(crit_pt1)
disp('Crit Point 1:');
disp(crit_pt1);
disp('p(Crit Point 1):');
disp(p(crit_pt1));
disp('Crit Point 2:');
disp(crit_pt2);
disp('p(Crit Point 2):');
disp(p(crit_pt2));
else
disp('The critical points are complex.');
end
disp('Left Endpoint:');
disp(a);
disp('p(Left Endpoint):');
disp(p(a));
disp('Right Endpoint:');
disp(b);
disp('p(Right Endpoint):');
disp(p(b));
Q=[p(a),p(b),p(crit_pt1),p(crit_pt2)];
disp('p(Xmax):');
disp(max(Q));
disp('p(Xmin):');
disp(min(Q));
delta = (b - a) / 100;
x = a:delta:b;
y = p(x);
plot(x, y)
0 Comments
Accepted Answer
Matt J
on 21 Sep 2014
You can use the text() command. Or, you can do
set(axis_handle,'XTick',whatever)
to have the x-axis show "whatever".
4 Comments
More Answers (0)
See Also
Categories
Find more on Interactive Control and Callbacks in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!