Download - graphs plotting in MATLAB
Miss. Patil Apurva PandurangM.Tech (Electronics)
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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)
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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
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0 5 10 15 20 25 30 35 40 45 50-1
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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
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time
sin
(x)
This is the sinus function
sin(x)
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time
sin
(x)
This is the sinus function
sin(x)
Data signal
X axis label
grids
Tick mark
legend
Graph title
Y axislabel
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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)
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plot(x,y,’line specifiers’)
Define style, color of line & type of marker
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Line Specifies Line Specifies Marker SpecifiesStyle Color Type
Solid - red r plus sign +dotted : green g circle odashed -- blue b asterisk *dash-dot -. Cyan c point .
magenta m square syellow y diamond dblack k
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Example:
x=0:0.1:2*pi;y=sin(x);plot(x,y,'r-*')
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fplot(‘function’,[limits])
E.g.
Plot the equation
x^3-2*cos(0.66*x)+4*sin(2*x)-1 in the limitbetween -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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Subplots subplot(m,n,P)
rowscolumns
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
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0
0.5
1sin(x) wave
0 10 20 30 40 50 60 70-1
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0
0.5
1cos(x) wave
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0 20 40 60 80-1
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1sin(x) wave
0 20 40 60 80-1
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1cos(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
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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
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0
0.5
1sin(x) wave
0 50 100 150-1
-0.5
0
0.5
1cos(x) wave
0 50 100 150-1
-0.5
0
0.5
1sawtooth wave
1 2 3 40
0.5
1randam wave
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Example
clcclear allx=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
1sawtooth wave
1 2 3 40
0.5
1randam wave
0 20 40 60 80 100 120 140-1
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0
0.5
1sin(x) wave
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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
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2.5
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3.5
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4.5
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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
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2
3
4
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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 41
1.5
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3.5
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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”
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30
210
60
240
90
270
120
300
150
330
180 0
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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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Thank you…..
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