plotting the graphs using different commands

1. Miss. Patil Apurva Pandurang
M.Tech (Electronics)
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2.  x = 0:0.1:2*pi; % first value is 0, last is 2*pi &
incrementad by 0.1
 y = sin(x); % for sin wave
 plot(x,y)
OR
 x= linspace(0,2*pi,1000)
% taking 1000 samples between 0 to 2pi
 y = sin(x); % for sin wave
 plot(y)
0 1 2 3 4 5 6 7
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
2

3.  plot(.)
>> x=linspace(0,2*pi,50);
>>y=sin(x);
>>plot(y)
 stem(.)
>> x=linspace(0,2*pi,50);
>>y=sin(x);
>>stem(y)
0 5 10 15 20 25 30 35 40 45 50
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
0 5 10 15 20 25 30 35 40 45 50
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
3

4.  title(.)
>>title(‘This is the sinus function’)
 xlabel(.)
>>xlabel(‘time’)
 ylabel(.)
>>ylabel(‘sin(x)’)
 legend(.)
>>legend ('sin_x')
 grid
>> grid on
>> grid off
 axis([xmin xmax ymin ymax])
Sets the minimum and maximum limits of the x- and y-axes
0 1 2 3 4 5 6 7
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
time
sin(x)
This is the sinus function
sin(x)
4

5. 0 1 2 3 4 5 6 7
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
time
sin(x) This is the sinus function
sin(x)
Data
signal
X axis
label
grids
Tick
mark
legend
Graph
title
Y axis
label
5

6.  Multiple x-y pair arguments create multiple
graph
x = 0:pi/100:2*pi;
y = sin(x);
y2 = sin(x-0.25);
y3 = sin(x-0.5);
plot(x,y,x,y2,x,y3)
0 1 2 3 4 5 6 7
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
6

7.  plot(x,y,’line specifiers’)
Define style, color of line
& type of marker
7

8. Line Specifies Line Specifies Marker Specifies
Style Color Type
Solid - red r plus sign +
dotted : green g circle o
dashed -- blue b asterisk *
dash-dot -. Cyan c point .
magenta m square s
yellow y diamond d
black k
0 1 2 3 4 5 6 7
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
Example:
x=0:0.1:2*pi;
y=sin(x);
plot(x,y,'r-*')
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9.  fplot(‘function’,[limits])
E.g.
Plot the equation
x^3-2*cos(0.66*x)+4*sin(2*x)-1 in the limit
between -3 & 3
>>fplot('x^3-2*cos(0.66*x)+4*sin(2*x)-1', [-3 3])
-3 -2 -1 0 1 2 3
-30
-20
-10
0
10
20
30
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10. Subplots
 subplot(m,n,P)
rows
columns
position
x=0:0.1:2*pi;
y=sin(x);
subplot(2,1,1);
plot(y)
title('sin(x) wave')
y1=cos(x)
subplot(2,1,2);
plot(y1)
title('cos(x) wave')
0 10 20 30 40 50 60 70
-1
-0.5
0
0.5
1
sin(x) wave
0 10 20 30 40 50 60 70
-1
-0.5
0
0.5
1
cos(x) wave
10

11. 0 20 40 60 80
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
sin(x) wave
0 20 40 60 80
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
cos(x) wavex=0:0.1:2*pi;
y=sin(x);
subplot(1,2,1);
plot(y)
title('sin(x) wave')
y1=cos(x)
subplot(1,2,2);
plot(y1)
title('cos(x) wave')
Example
11

12. Example:
x=0:0.1:4*pi;
y=sin(x);
subplot(2,2,1);
plot(y)
title('sin(x) wave')
y1=cos(x)
subplot(2,2,2);
plot(y1)
title('cos(x) wave')
y2=sawtooth(x)
subplot(2,2,3);
plot(y2)
title('sawtooth wave')
y3=rand(4)
subplot(2,2,4);
plot(y3)
title('randam wave')
0 50 100 150
-1
-0.5
0
0.5
1
sin(x) wave
0 50 100 150
-1
-0.5
0
0.5
1
cos(x) wave
0 50 100 150
-1
-0.5
0
0.5
1
sawtooth wave
1 2 3 4
0
0.5
1
randam wave
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13. Example
clc
clear all
x=0:0.1:4*pi;
y=sin(x);
subplot(2,2,1:2);
plot(y)
title('sin(x) wave')
y2=sawtooth(x)
subplot(2,2,3);
plot(y2)
title('sawtooth wave')
y3=rand(4)
subplot(2,2,4);
plot(y3)
title('randam wave')
0 50 100 150
-1
-0.5
0
0.5
1
sawtooth wave
1 2 3 4
0
0.5
1
randam wave
0 20 40 60 80 100 120 140
-1
-0.5
0
0.5
1
sin(x) wave
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14.  bar(x,y)
x=[1 2 3 4 5]
y=[1 2 3 4 5]
bar(x,y)
 function creates
vertical Bar plot 1 2 3 4 5
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
14

15.  barh(x,y)
x=[1 2 3 4 5]
y=[1 2 3 4 6]
barh(x,y)
 function creates
horizontal Bar plot
0 1 2 3 4 5 6
1
2
3
4
5
15

16.  stairs(x,y)
x=[0 1 2 3 4]
y=[1 2 3 4 6]
stairs(x,y)
 function creates
stair plot
0 0.5 1 1.5 2 2.5 3 3.5 4
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
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17.  compass(x,y)
x=[1 2 3 4 5]
y=[1 2 3 4 6]
compass(x,y)
 function creates polar plot
Location of points to plot in
“Cartesian coordinates”
2
4
6
8
30
210
60
240
90
270
120
300
150
330
180 0
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18.  pie(x)
x=[1 2 3 4 5]
pie(x)
 function creates pie plot
 Values are in terms of percentage
7%
13%
20%
27%
33%
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19. Thank you…..
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