2-d Plotting

Not this

And not this

But this

Line Plots

Syntax

X = linspace(0,2*pi,1000); Y1 = sin(X); Y2 = cos(X);

plot(X,Y1)

plot(X,Y1,':r')

plot(X,Y1,X,Y2)

plot(X,Y1,'-.m',X,Y2,'ok')

plot(Y1)

plot(Y1,'--g')

Pie Charts

X = [1 3 0.5 2.5 2]

pie(X)

explode = [0 1 0 1 0];

pie(X,explode)

X = 1:3;

labels = {'Taxes','Expenses','Profit'};

pie(X,labels)

Bar Graphs



Y = [75 91 105 123.5 131 150 179 203 226 249 281.5]

bar(Y)

X = 1900:10:2000;

bar(X,Y)

bar(Y,0.4)

Discrete Plots




X = linspace(0,3*pi,200); Y = cos(X) + rand(1,200);

scatter(X,Y)

sz = linspace(1,100,200);

scatter(X,Y,sz)

c = linspace(1,10,length(x));

scatter(X,Y,[],c)

sz = 25;

c = linspace(1,10,length(x));

scatter(X,Y,sz,c,'filled')

Intermission

Polar Plots

theta = 0:0.01:2*pi;

rho = sin(2*theta).*cos(2*theta);

polarplot(theta,rho)

theta = linspace(0,6*pi);

rho1 = theta/10;

polarplot(theta,rho1)

rho2 = theta/12;

hold on

polarplot(theta,rho2,'--')

hold off

th = pi/4:pi/4:2*pi;

r = [19 6 12 18 16 11 15 15];

polarscatter(th,r)

th = linspace(0,2*pi,20);

r = rand(1,20);

sz = 75;

polarscatter(th,r,sz,'filled')

Animation

t = 0:.01:20*pi;

x = t.*cos(t);

comet(x);

t = 0:.01:2*pi;

x = cos(2*t).*(cos(t).^2);

y = sin(2*t).*(sin(t).^2);

comet(x,y);

t = 0:.01:20*pi;

x = t.*cos(t);

y = t.*sin(t);

comet(x,y);

Symbolic Plotting

Symbolic?













fplot(@(x) sin(x))

xt = @(t) cos(3*t);

yt = @(t) sin(2*t);

fplot(xt,yt)

fplot(@(x) exp(x),[-3 0],'b')

hold on

fplot(@(x) cos(x),[0 3],'b')

hold off

grid on

fplot(@(x) sin(x+pi/5),'Linewidth',2);

hold on

fplot(@(x) sin(x-pi/5),'--or');

fplot(@(x) sin(x),'-.*c')

hold off

Example

x = linspace(0,2*pi,60);
a = sin(x);
b = cos(x);
plot(x,a+b,'r')

hold on
stem(x,a,'c')
stem(x,b,'g')
hold off

title('Linear Combination of Two Functions')
xlabel('Time in \musecs')
ylabel('Magnitude')
legend('a+b','a = sin(x)','b = cos(x)')

Algorism and Bushism of the Day

"There's an old saying in Tennessee — I know it's in Texas, probably in Tennessee — that says, fool me once, shame on — shame on you. Fool me — you can't get fooled again."

"I'm very familiar with the importance of dairy farming in Wisconsin. I've spent the night on a dairy farm here in Wisconsin. If I'm entrusted with the presidency, you'll have someone who is very familiar with what the Wisconsin dairy industry is all about."

Lesson of the Day

Failure – a few errors in judgment practiced everyday
in 30 days things are getting worse – imagine what happens in 5 years

Success – a few new disciplines practiced everyday
in 30 days things are getting better – imagine what happens in 5 years

Fix the errors of the past and pick up a few new disciplines for the future

Word of the day

Kramer



The End