1Lecture (4)

Plotting & Programming (1)Eng. Osama Talaat

2 Plotting

t 0 1 2 3 4 5s -5.18 6.08 24.97 36 54.98 66.07

3 Plotting

t 0 1 2 3 4 5s -5.18 6.08 24.97 36 54.98 66.07

4 Plotting: Line Colors>> plot(t,s,'r')Colors: 'r': red 'g': green 'y': yellow 'b': blue 'w': white 'k': black

5 Plotting: Line Style>> plot(t,s,'--') '-': Solid '--': Dashed ':': Dotted '-.': Dash-Dot '+': Plus signs '*': Asterisks 'x': Crosses 's': Squares 'd': Diamonds

6 Plotting: Line Style & Color Red Dashed line:

>> plot(t,s,'r--') >> plot(t,s,'--r')

7 Plotting Titles X-Axis Title:

>> xlabel('time')

8 Plotting Titles Y-Axis Title:

>> ylabel('Speed')

9 Plotting Titles Graph Title:

>> title('Speed Curve')

10 Plotting Grid>> grid

11 Plotting: Texts Using Coordinates:

>> text(0.6,-2,'Point(0.5,0)')

12 Plotting: Texts Using Mouse:

>> gtext('Point(0.5,0)')

13 Plotting: Axis Limits X-Axis Limits:

>> xlim([0.5 4])

14 Plotting: Axis Limits Y-Axis Limits:

>> ylim([-20 50])

15 Plotting: Figure window

ClickHere

16 Plotting in the same figure Close all windows. Plot sin(x)

>> x=0:0.1:4*pi;

>> plot(x,sin(x))

Plot 2cos(x)>> plot(x,2*cos(x))

???

17 Plotting in the same figure>> x=0:0.1:4*pi;>> y1=sin(x);>> y2=2*cos(x);>> plot(x,y1,x,y2)>> plot(x,y1,'r',x,y2,'--b')

18 Plotting in the same figure>> plot(x,y1,'r')>> hold on>> plot(x,y2,'--b')>> hold off

19 Plotting in the same figure: Legend>> legend('sin(x)','2cos(x)')

20 Plotting in separate figures>> plot(x,y1,'r')>> figure>> plot(x,y2,'--b')

21 Test yourself !!>> close all Insert each graph titles and grid ??>> plot(x,y1,'r')>> xlabel('x')>> ylabel('y1')>> title('sin(x)')>> grid>> figure>> plot(x,y2,'--b')>> xlabel('x')>> ylabel('y2')>> title('2cos(x)')>> grid

22 Subplotting

23 Subplotting>> subplot(2,2,1)

24 Subplotting>> plot(x,sin(x))

25 Subplotting>> title('sin(x)'); grid

26 Subplotting>> subplot(2,2,2)

27 Subplotting>> plot(x,cos(x)); title('cos(x)'); grid

28 Subplotting>> subplot(2,2,3)

>> plot(x,sin(2*x))

>> title('sin(2x)')

>> grid

>> subplot(2,2,4)

>> plot(x,cos(2*x))

>> title('cos(2x)')

>> grid

29 NB: Variable Plottingx = [2 3 4 12 15 14]

>> x = [2 3 4 12 15 14];>> plot(x)

1 2 3 4 5 6

30 Other Plotting Functions>> area(x,sin(x))

31 Other Plotting Functions>> stairs(x,sin(x))

32 Other Plotting Functions>> bar([2001:2006],[13 15 17 20 6 12])

33 Other Plotting Functions>> pie([15 23 57 5])

34 Other Plotting Functions>> pie3([15 23 57 5])

35 Other Plotting Functions Plotting an equation

>> ezplot('(x^2+y^2-1)^3-x^2*y^3=0')

>> xlim([-1.5 1.5])

>> ylim([-1.5 1.5])

36 Polar Coordinates>> th=0:0.01:2*pi;>> r=sin(4*th);>> polar(th,r)

37 3D Plotting: Curve>> t=0:0.1:10*pi; plot3(sin(t),cos(t),t); grid

38 Test Yourself !! Insert Z-Axis Label:>> zlabel('height')

39 3D Plotting: Surface

40 3D Plotting: Surface

>> [x,y]=meshgrid(-2:0.1:2,-2:0.1:2);>> z=x.*exp(-x.^2-y.^2);>> surf(x,y,z)

41 3D Plotting: Surface>> mesh(x,y,z)

42 Special Surfaces Sphere

>> sphere

43 Special Surfaces Cylinder

>> cylinder

44 Special Surfaces MATLAB Logo

>> logo

45Introduction to Programming

Create New Program: Ctrl + N New button File menu >> New >> script

46

x=[0:0.1:2*pi];y=sin(x);plot(x,y)xlabel('x')ylabel('sin(x)')title('Sine Curve')grid!!')

47

clear all;close all;clc;

x=[0:0.1:2*pi];y=sin(x);plot(x,y)xlabel('x')ylabel('sin(x)')title('Sine Curve')grid

Clean

Start

48 GOOD LUCKTo be continued in the next lecture …