Problem with Legend command.
4 views (last 30 days)
Show older comments
syms x
f=log(x);
hold on
T1=taylor(f,'Expansionpoint',2,'order',1)
T2=taylor(f,'Expansionpoint',2,'order',2)
T3=taylor(f,'Expansionpoint',2,'order',3)
T4=taylor(f,'Expansionpoint',2,'order',4)
x=-5:.1:5;
xx=subs(x);
yy1=subs(T1);
plot(xx,yy1,'m');
yy2=subs(T2);
plot(xx,yy2,'r');
yy3=subs(T3);
plot(xx,yy3,'c');
yy4=subs(T4);
plot(xx,yy4,'b');
legend('po(x)','p1(x)','p2(x)','p3(x)')
xlabel('x');
ylabel('y');
grid on
The problem is very silly and i think i am missing something elementary.Why the legend command not giving different colors to the p0,p1,p2,p3 in the image.Any help will be appreciated.
0 Comments
Answers (1)
Star Strider
on 15 Dec 2017
Edited: Star Strider
on 15 Dec 2017
The problem is the first plot call.
Change it to:
fplot(yy1,[-5 5],'m');
and everything else works.
EDIT —
Also, the ‘xx’ assignment is not necessary. Simply delete it and use ‘x’ instead in the rest, or use fplot for the rest, as with the first one.
2 Comments
Walter Roberson
on 16 Dec 2017
The first couple of versions that had fplot did not support symbolic variables. You might be using an older release. If so then instead of passing yy to fplot, call matlabFunction on yy and pass the result to fplot
See Also
Categories
Find more on Legend 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!