Matlab plotting
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Program 1: clear all;close all;clc;clf; t=0:0.01*pi:4*pi; x=sin(t); y=x; z=x; n=length(y); for i=1:n if (x(i)<0) y(i)=0; z(i)=-1*z(i); end end u=figure(1); set(u,'color','w') subplot 221 plot(t,x) title('input:sinusoidal wave') subplot 222 plot(t,y) title('half wave rectifier') subplot 223 plot(t,z) title('full wave rectifier') subplot 224 plot(t,z,'--') hold on line([pi/2 3*(pi/2)-0.5],[1 -1*sin(3*(pi/2)- 0.5)]); line([3*pi/2 5*(pi/2)-0.5],[1 1*sin(5*(pi/2)- 0.5)]); line([5*pi/2 7*(pi/2)-0.5],[1 -1*sin(7*(pi/2)- 0.5)]); title('smoothed rectifier signal')
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Transcript of Matlab plotting
Program 1:
clear all;close all;clc;clf; t=0:0.01*pi:4*pi; x=sin(t); y=x; z=x; n=length(y); for i=1:n if (x(i)<0) y(i)=0; z(i)=-1*z(i); end end u=figure(1); set(u,'color','w') subplot 221 plot(t,x) title('input:sinusoidal wave') subplot 222 plot(t,y) title('half wave rectifier') subplot 223 plot(t,z) title('full wave rectifier') subplot 224 plot(t,z,'--') hold on line([pi/2 3*(pi/2)-0.5],[1 -1*sin(3*(pi/2)-
0.5)]); line([3*pi/2 5*(pi/2)-0.5],[1 1*sin(5*(pi/2)-
0.5)]); line([5*pi/2 7*(pi/2)-0.5],[1 -1*sin(7*(pi/2)-
0.5)]); title('smoothed rectifier signal')
Program 2:
clc;close all;clear all; t=0:0.1*pi:2*pi; n=length(t); r=0.5*ones(1,n); r1=ones(1,n); [x y]=pol2cart(t,r); [x1 y1]=pol2cart(t,r1); x2=x1+1; e=figure(1) set(e,'color','w'); subplot 221 plot(x,y) title('radius=0.5m') axis([-3 3 -3 3]); subplot 222 plot(x1,y1) title('radius=1m')
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axis([-3 3 -3 3]); subplot 223 plot(x2,y1) title('radius=1m,shifted') axis([-3 3 -3 3]); for i=1:2:4 for j=1:2:4 x2=x+i; y2=y+j; subplot 224 plot(x2,y2) text(1.7,2,'core') title('pcf') hold on; end end
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Program 3:
clear all;close all;clc; [x,y,z]=cylinder(5); [x1,y1,z1]=cylinder; figure(1) subplot 221 surf(x1,y1,z1) subplot 222 surf(x,y,z) subplot 223 axis square surf(x,y,z) hold on surf(x1,y1,z1)
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Program 4:
clear all;close all;clc; t=0:0.1*pi:2*pi; subplot 221 cylinder(cos(t)) subplot 222 cylinder(sin(t)) subplot 223 cylinder(exp(t)) subplot 224 cylinder(log(t)) colormap gray
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Program 5:
clear all;close all;clc; t=0:0.1*pi:2*pi; subplot 221 cylinder(cos(t)) subplot 222 cylinder(sin(t)) subplot 223 cylinder(exp(t)) subplot 224 cylinder(log(t)) colormap spring
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Program 6:
clear all;close all;clc; t=0:0.1*pi:2*pi; subplot 321 cylinder(2+sin(t)) subplot 322
cylinder(2+cos(t)) subplot 323 cylinder(t.^4) subplot 324 cylinder(t.^2) subplot 325 cylinder(exp(-t)+2) subplot 326 cylinder(t.^2) hold on cylinder(t)
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Program 7:
clear all;close all;clc; syms x; y=sin(x); subplot 211 ezplot(y) grid on subplot 212 ezplot(y,[0:4*pi])
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Program 8:
clear all;close all;clc; syms t; y=sin(t); figure(1) subplot 221
ezsurf(y,[-pi pi]) subplot 222 ezsurf(y) z=sin(t)*cos(3*t); subplot 223 ezpolar(z) subplot 224 ezpolar(z,[0 pi]);
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Program 9:
clear all;close all;clc; syms t; y=t^3; subplot 221 ezplot(y) y1=diff(y); y2=diff(y,2); y3=diff(y,3); subplot 222
ezplot(y1) subplot 223 ezplot(y2) subplot 224 ezplot(y3)
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Program 10:
clear all;close all;clc; t=1:0.1:5; y=t.^2; dy1=diff(y)./diff(t); td1=t(2:length(t)); figure(1) subplot 121 plot(t,y)
grid on title('using numerical') subplot 122 plot(td1,dy1) title('numerical diff')
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Program 11:
clear all;close all;clc; t=1:0.1:5; y=rand(1,length(t)); dy1=diff(y)./diff(t); td1=t(2:length(t)); subplot 211 plot(t,y)
title('noise signal over 5 second') subplot 212 plot(td1,dy1) title('the rate of change of the noise w.r.t
time')
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: 12 Program
clear all;close all;clc; x=0:0.1:10; y=0:0.1:10; [x1 y1]=meshgrid(x,y); for i=1:length(x) for j=1:length(y) if (y1(i,j)>=0 && y1(i,j)<2) z1(i,j)=0; elseif (y1(i,j)>=2 && y1(i,j)<4) z1(i,j)=2; elseif (y1(i,j)>=4 && y1(i,j)<6) z1(i,j)=4; elseif (y1(i,j)>=6 && y1(i,j)<8) z1(i,j)=6; else z1(i,j)=8; end end end surf(x1,y1,z1)
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: 13 Program
clear all;close all;clc; phi=0:0.01*pi:2*pi; n=length(phi); r=ones(1,n); a=figure(1); set(a,'color','g') subplot 121 e=polar(phi,r); set(e,'linewidth',4) subplot 122 [x y]=pol2cart(phi,r); plot(x,y,'k')
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:14 Program
clear all;close all;clc; phi=0:0.01*pi:2*pi; n=length(phi); r=ones(1,n); a=figure(1); set(a,'color','g') subplot 121 e=polar(phi,r); set(e,'linewidth',4) subplot 122 [x y]=pol2cart(phi,r); plot(x,y,'k') hold on for i=1:length(x)/4; if (sqrt(x(i).^2+y(i).^2)<=1) line([ 0 x(i)],[0 y(i)]) end end
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:15 Program
clear all;close all;clc; a=[50 0;0 50]; b=repmat(a,[3 3]); e=figure(1) set(e,'color','m')
image(b) colormap gray axis off
Program 16:
clear all;close all;clc; t=0:0.1*pi:4*pi; y=sin(t); n=length(t); noise=0.1*randn(1,n); ynoise=y+noise; r=figure(1); set(r,'color','g') subplot 221 plot(t,y,'r') title('signal') subplot 222 plot(t,noise,'k') title('noise') subplot 223 plot(t,ynoise,'color','b') title('ynoise')
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:17 Program
clear all;close all;clc; t=0:0.1*pi:4*pi; n=length(t); y1=2*sin(0.5*t);%first input y2=2*cos(0.5*t);%second input y3=cos(5*t); %carrier ya=y1.*y3; yb=y2.*y3;
subplot 221 plot(t,y1,'-.',t,y2,'-') subplot 222 plot(t,y3) title('carrier') subplot 223 plot(t,ya) title('carrier * sin') subplot 224 plot(t,yb) title('carrier *cos')
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Program 18: clear all;close all;clc; t=0:0.01*pi:4*pi; x=cos(4*pi*t)+cos(8*pi*t)+cos(12*pi*t); fx=fft(x,512); w=1/(0.01*pi*2)*linspace(0,1,256); subplot 421 plot(t,x) xlabel('time') ylabel('amplitude') subplot 422 plot(w,abs(fx(1:256))) xlabel('frequency HZ') ylabel('amplitude') axis([0 20 0 200]) filter=ones(1,256); filter(1,90:256)=0; subplot 423 plot(w,filter) xlabel('frequency HZ') ylabel('amplitude') axis([0 20 0 2]) subplot 424 result=abs(fx(1:256)).*filter; plot(w,result) xlabel('frequency HZ')
ylabel('amplitude') axis([0 20 0 200]) subplot 413 plot(w,result) xlabel('frequency') ylabel('amplitude') axis([0 16 0 200]) iresult=ifft((fx),length(t)); subplot 414
plot(t,iresult) xlabel('time') ylabel('amplitude') axis([0 14 -2 2])
Program 19:
z=[10 4 6 9 3]; subplot 221 pie(z) subplot 222 pie(z,[0 0 0 1 0]); subplot 223 pie(z,[1 1 1 1 1]) subplot 224 pie3(z,[0 0 0 1 0]);
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Program 20: clear all ;close all; clc x=-3:3; y=x.^2; bar(x,y)
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Program 21:
clear all ;close all; clc y=round(rand(2,3)*10); subplot 221 bar(y) subplot 222 barh(y) subplot 223 bar(y,'stacked')
subplot 224 bar(y,1)
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Program 22: clear all;close all;clc t=0:0.1*pi:2*pi; x=sin(t); subplot 221 plot(t,x,'*r') subplot 222 stem(t,x)
subplot 223 stairs(t,x) subplot 224 fill(t,x,'g')
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Program 23: clear all ;close all;clc; syms x t w a f1=heaviside(x); f2=heaviside(x-2); f3=heaviside(x+2); f4=heaviside(x+2)-heaviside(x-2); subplot 221
ezplot(f1,[-5 5]) subplot 222 ezplot(f2,[-5 5]) subplot 223 ezplot(f3,[-5 5]) subplot 224 ezplot(f4,[-5 5])
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Program 24: clear all ;close all;clc;clf t=0:0.01*pi:4*pi; vint=cos(2*pi*4*t); fvint=fft(vint,512); w=1/(0.01*pi*2)*linspace(0,1,256); subplot 211 plot(t,vint) xlabel('time') ylabel('amplitude')
subplot 212 plot(w,abs(fvint(1:256))) xlabel('frequency') ylabel('magnitude')
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Program 25: clear all ;close all;clc;clf t=0:0.01*pi:4*pi; x=cos(t); y=sin(t); plot(t,x,'-r',t,y,'.g') legend('cos','sin') title('sinusoidal signals')
xlabel('time')
ylabel('amplitude')
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Program 26: z=magic(3);
subplot 221
bar(z)
subplot 222
bar(z,'stacked')
subplot 223
bar(z,'grouped')
subplot 224
barh(z,'stacked')
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Program 27: z=magic(2);
subplot 221
bar(z)
subplot 222
bar(z,'c')
subplot 223
bar(z,'histic')
subplot 224
barh(z,'histic')
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Program 28: z=round(10.*rand(1,10));
figure(4)
subplot 211
hist(z,5)
subplot 212
hist(z,7)
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Program 29:
t=0:0.01*pi:2*pi;
y=sin(2*t).*cos(2*t);
figure(8)
subplot 221
polar(t,y,'--g')
subplot 222
polar(t,y,'bs')
subplot 223
polar(t,y,'dr')
subplot 224
f=polar(t,y);
set(f,'color','m')
set(f,'linewidth',2)
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Program 30: x=[1:10];
y=2.*rand(1,10);
figure(1)
set(figure(1),'color','yellow');
subplot 221
scatter(x,y)
subplot 222
scatter(x,y,'r')
subplot 223
scatter(x,y,3,'g')
subplot 224
stem(x,y)
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Program 31: clear all;close all;clc
[x,y,z]=sphere(100);
x1=x(:);
y1=y(:);
z1=z(:);
figure(1)
set(figure(1),'color','y')
scatter3(x1,y1,z1)
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Program 32: clear all;close all;clc
[x,y,z]=sphere(100);
x1=x(:);
y1=y(:);
z1=z(:);
figure(1)
set(figure(1),'color','y')
subplot 211
scatter3(x1,y1,z1,2,'k')
subplot 212
scatter3(x1,y1,z1,10,'g')
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Program 32: x=0:10;
y=0:10;
[xm ym]=meshgrid(x,y);
z=xm.^2/2+ym.^2/4;
figure(1)
subplot 221
mesh(z)
subplot 222
contour(x,y,z)
subplot 223
surf(x,y,z)
subplot 224
surfc(x,y,z)
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Program 33: %system of linear equation
%cramer method
a=[1 2 3;2 3 4;4 2 5];
b=[4;5;1];
d1=a;
d1(:,1)=b;
x(1)=det(d1)/det(a)
d2=a;
d2(:,2)=b;
x(2)=det(d2)/det(a)
d3=a;
d3(:,3)=b;
x(3)=det(d3)/det(a)
command window:
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Program 34: %system of linear equation
%Gass elimination
a=[1 2 3;2 3 4;4 2 5];
b=[4;5;1];
x=inv(a)*b
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Program 35:
Program 36:
>> y=logspace(1,5);
>> size(y)
ans =
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>> z=logspace(1,5,5);
>> area(z)
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Program 37:
x=ones(10,10);
x(3,3)=10;
x(3,7)=10;
x(6,5)=10;
x(8,4:6)=10;
image(x)
colormap copper(2)
%colormap spring(2)
%colormap hsv
%colormap summer
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