అన్నమాచార్య ఇన్స్టిట్యూట్ ఆఫ్ టెక్నాలజీ లో చెప్పినవాటిలో కొంత భాగము 17, 18-8-17

%-- 8/17/17 10:36 AM --%
dsolve('D2y+5*Dy+6=0,y(0)=0,Dy(0)=0')
dsolve('D2y+5*Dy+6=0,y(0)=1,Dy(0)=0')
dsolve('D2y+5*Dy+6=1,y(0)=1,Dy(0)=0')
clc
help wavrecord
clc
Fs = 11025;
y  = wavrecord(5*Fs, Fs, 'int16');
wavplay(y, Fs);
who
whos
clc
wavwrite(y,11025,'nayaa.wav')
clc
a=wavread('kotta.wav');
whos
clc
a(10000:10004,:)
clc
b=(:,1);
b=a(:,1);
wavwrite(b,44100,'nootana.wav')
c=b(1:2:666880);
whos
clc
wavwrite(c,22050,'adhunaatana.wav')
guide
clc
sphere
clc
rand
clc
rand*100
ceil(rand*100)
clc
ceil(rand*6)
clc
ceil(rand*6)
clc
ceil(rand*10)
clc
%-- 8/17/17  2:13 PM --%
a=[0 0 0 1 0 0 0 0 0];
stem(a)
n=-3:4
stem(n,a)
n=-3:5
stem(n,a)
clc
fvtool(a)
a
b=[0 0 0 0 1 zeros(1,4)]
stem(n,b)
fvtool(b)
clc
a
c=10*a
fvtool(c)
clc
y=filter([0  1  0],[1  -1  -1],[zeros(1,4) 1   zeros(1,4)])
y=filter([0  1  0],[1  -1  -1],[ 1   zeros(1,7)])
clc
f1=1000;
fs=7000;
n=1:1000;q=sin(2*pi*(f1/fs)*n);
plot(q)
n=1:100;q=sin(2*pi*(f1/fs)*n);
plot(q)
n=1:50;q=sin(2*pi*(f1/fs)*n);
plot(q)
n=1:100;q=sin(2*pi*(f1/fs)*n);
plot(q)
clc
fvtool(modulated_signal)
clc
clear all
clc
a=imread('eDaari.jpg');
whos
close all
clc
b=a(:,1024:-1:1,:);
imshow(b)
clc
c=a;
imshow(c)
c(:,:,1)=0;
imshow(c)
clc
c(:,:,3)=0;
imshow(c)
clc
help imnoise
clc
I = imread('eight.tif');
J = imnoise(I,'salt & pepper', 0.02);
figure, imshow(I), figure, imshow(J)
e=[10  30  40  20  25]
median(e)
clc
%-- 8/17/17  4:40 PM --%
clearv all
clear all
clc
b(1:256,1:256)=0;
imshow(b)
%-- 8/17/17  4:43 PM --%
a=checkerboard(8);
imshow(a)
clc
a=[1 1 2 -1];
b=[1 0 1 0 2 0 -1 0];
c=[1 1 1 1 2 2 -1 -1];
fvtool(a)
fvtool(b)
fvtool(c)
fvtool([1  -2*cos(pi/3)  1])
help wavrecord
clc
Fs = 11025;
y  = wavrecord(5*Fs, Fs, 'int16');
wavplay(y, Fs);
%-- 8/18/17  9:33 AM --%
1-1
cftool
v=[1 2 3 4 7];
i=[2 3 4.01  5.04  7.98];
whos
clc
a=[1 2;2 3]
det(a)
rank(a)
b=inv(a)
eig(a)
clc
[u,v]=eig(a)
clc
a=[1 2 3;2 3 4;3 4 5]
clc
rank(a)
inv(a)
clc
eig(a)
clc
a
clc
rank(a)
eig(a)
clc
format long
eig(a)
clc
a=wavread('prayatn_.wav');
whos
clc
help filter
clc
b=filter([1   -2*cos(140*pi/441)  1],1,a);
wavwrite(b,44100,'nootana_.wav')
clc
plot([10 20 40 15])
plot([5 10 15 20],[10 20 40 15])
axis([0 30],[0 50])
axis([0 30 0 50])
clc
x1=[1 3 5 7];x2=x1;y1=[10 20 40 10];y2=[-1 0 2  1];plotyy(x1,y1,x2,y2);
clc
help plot3
clc
t = 0:pi/50:10*pi;
plot3(sin(t),cos(t),t);
plot3(t*sin(t),t*cos(t),t);
plot3(t.*sin(t),t.*cos(t),t);
%-- 8/18/17  2:12 PM --%
dsolve('Dy+4*y=1,y(0)=0')
syms t  s;laplace(t)
ilaplace(ans)
diff(u*v)
syms u,v; diff(u*v)
syms u v
diff(u*v)
diff(u*v,u)
clc
help limit
limit(sin(x)/x)
sym x
limit(sin(x)/x)
syms  s  t  x  u  v
limit(sin(x)/x)
clc
syms t u v x y z s
limit((x^2-4)/(x-2),2)
limit((x^2-4)/(x-2))
clc
diff(t^2)
diff(t^2+sin(t))
diff(t^2+sin(t),2)
clc
diff(u*v)
diff(v*u)
clc
diff(v*u,u)
clc
int(t)
int(t+sin(t))
clc
int(t,0,1)
clc
int(int(t))
clc
a=[1 -2  1];
b=[1 1 1];
dot(a,b)
cross(a,b)
clc
a=[10 20 40]; b=[20 40 50];
union(a,b)
intersection(a,b)
intersect(a,b)
clc
a
b
a-b
setdiff(a,b)
clc
who
whos
q=[1   1+i; 2   -i]
whos
clc
q
p=q'
clc
r=[1 2;3 4]
r'
clc
real(q)
imag(q)
clc
who
clear b
whos
who
clear all
who
clc
a=[70  80  90;80 70  70];
a
a+5
clc
a
a*5/100
clc
a*1.05
clc
sphere
a=[1 1;2  1];b=[1;0]
a
inv(a)*b
clc
help solve
clc
solve('a*u^2 + v^2','u - v = 1','a,u')
help solve
clc
[u,v] = solve('a*u^2 + v^2 = 0','u - v = 1')
[u,v] = solve('u + v =1','2u + v = 0')
[u,v] = solve('u + v =1','2*u + v = 0')
clc
dsolve('Dy+4*y=1,y(0)=0.5')
clc
issorted([10  20  50  25 10])
issorted([10  20  50  70  80  80])
clc
10
8
clc
help polar
clc
t = 0:.01:2*pi;
polar(t,sin(2*t).*cos(2*t),'--r')
polar(t,0.8*sin(4*t).*cos(4*t))
polar(t,sin(2*t).*cos(2*t),'--r')
hold on
polar(t,0.8*sin(4*t).*cos(4*t))
hold on
polar(t,0.6*sin(6*t).*cos(6*t),'green')
clc
help imrotate
clc
I = fitsread('solarspectra.fts');
I = mat2gray(I);
J = imrotate(I,-1,'bilinear','crop');
figure, imshow(I), figure, imshow(J)
clc
clear all
close all
I = fitsread('solarspectra.fts');
I = mat2gray(I);
J = imrotate(I,-1,'bilinear','crop');
figure, imshow(I), figure, imshow(J)
I = fitsread('solarspectra.fts');
I = mat2gray(I);
J = imrotate(I,45,'bilinear','crop');
figure, imshow(I), figure, imshow(J)
clc
J = imrotate(I,45,'bilinear');
figure, imshow(I), figure, imshow(J)
a=imread('eDaari.jpg');
size(a)
b=a(1:2:768,:,:);
imshow(b)
c=b(:,1:2:1024,:);
imshow(c)
clc
whos
clc
q=checkerboard(8);
imshow(q)
imhist(q)
imshow(q)
sqrt([25 49 225])
([25 49 225]).^(1/3)
clc
log(10)
log10(10)
clc
sin(90)
sin(pi/2)
clc
a=[1 2 3;2 3 4]
b=pinv(a)
a*b
clc
a=[1 2 ;3 4]
b=[1 1;1 -1]
clc
a+b
a-b
a*b
a/b
inv(a)*b
a*inv(b)
a\b
inv(a)*b
clc
a=[12  24];b=[40 50];c=[1  2];
b*c'
clc
%-- 8/19/17 11:57 AM --%
x=sin(2*pi*1*t
clc
f1=100;
fs=1000;
a=sin(2*pi*(f1/fs)*n);
%-- 8/20/17  8:38 PM --%