How can i draw Butterflies like this

Answer 1

[Image Analyst]

Well they pretty much told you how to do it step by step. To get t I'd use colons:

t = 0 : dt : 40*pi;

To plot in red or black, use

plot(x, y, 'r-', 'LineWidth', 2); % Red line
plot(x, y, 'k-', 'LineWidth', 2); % Black line

What more help do you need?

http://www.mathworks.com/matlabcentral/answers/8626-how-do-i-get-help-on-homework-questions-on-matlab-answers

[Arif Bilkay]

function [x, y] = butterfly_function(tmin, tmax, dt, s, xo, yo)

t=tmin:dt:tmax;

f=exp(cos(t))-2.*cos(4.*t)-(sin(t./12)).^5;

x=xo+s.*f.*sin(t);

y=yo+s.*f.*cos(t);

end

tmin=0;

tmax=40*pi;

dt=0.001;

s=0.1;

xo=1;

yo=1;

[x, y] = butterfly_function(tmin, tmax, dt, s, xo, yo)

plot(x,y,'b');

axis([0 4 0 4])

axis equal

hold on;

s=0.2;

xo=3;

yo=3;

[x, y] = butterfly_function(tmin, tmax, dt, s, xo, yo)

plot(x,y,'r');

axis([0 4 0 4])

axis equal

hold on;

s=0.4;

xo=2.5;

yo=1;

[x, y] = butterfly_function(tmin, tmax, dt, s, xo, yo)

plot(x,y,'g');

axis([0 4 0 4])

axis equal

hold on;

end

[Image Analyst]

OK, so did that work? (I haven't tried it).

[Arif Bilkay]

Yeah! It finally happened. Thank you so much for helping :))

[Image Analyst]

You're welcome. Could you then "Accept this answer" as additional thanks. Thanks in advance.