dec2bin(40)

ans =

101000

type dataex2.m

X = [ 1 2 3 ; 0 1 1; 1 1 0] ;
Y = [ 2 0 2 ; 2 1 2; 2 2 1; 2 2 2];
Z = [ 2 2 2 ; 2 1 2; 1 2 1];
R= [1   2  2 ];
S= [1 ; 1; 1 ];
T=['COMPUTER' 'Science?'];
W=['Computer';'SCIENCES'];
z

X

X =

     1     2     3
     0     1     1
     1     1     0

X(1,1) 

ans =

     1

X(end,1)

ans =

     1

X(1,end) 

ans =

     3

X

X =

     1     2     3
     0     1     1
     1     1     0

X(end,end) 

ans =

     0

X(1:end)

ans =

     1     0     1     2     1     1     3     1     0

X(end)

ans =

     0

W

W =

Computer
SCIENCES

dataex2
W

W =

Computer
SCIENCES

W(1,4:6)

ans =

put

W(2,7)

ans =

E

W

W =

Computer
SCIENCES

W(4)

ans =

C

i*i

ans =

    -1

j*j

ans =

    -1

i/i

ans =

     1

W

W =

Computer
SCIENCES



whos
  Name      Size            Bytes  Class     Attributes

  R         1x3                24  double              
  S         3x1                24  double              
  T         1x16               32  char                
  W         2x8                32  char                
  X         3x3                72  double              
  Y         4x3                96  double              
  Z         3x3                72  double              
  ans       1x1                 8  double              

p2b =  5+ ~ 1 & ~ 0

p2b =

     1

whos p2b
  Name      Size            Bytes  Class      Attributes

  p2b       1x1                 1  logical              

p3a= 1:2:5

p3a =

     1     3     5

whos p3a
  Name      Size            Bytes  Class     Attributes

  p3a       1x3                24  double              

Y

Y =

     2     0     2
     2     1     2
     2     2     1
     2     2     2

Y(1:2,2:end)

ans =

     0     2
     1     2

whos ans
  Name      Size            Bytes  Class     Attributes

  ans       2x2                32  double              

T

T =

COMPUTERScience?

length(T)

ans =

    16

whos
  Name      Size            Bytes  Class      Attributes

  R         1x3                24  double               
  S         3x1                24  double               
  T         1x16               32  char                 
  W         2x8                32  char                 
  X         3x3                72  double               
  Y         4x3                96  double               
  Z         3x3                72  double               
  ans       1x1                 8  double               
  p2b       1x1                 1  logical              
  p3a       1x3                24  double               

Y

Y =

     2     0     2
     2     1     2
     2     2     1
     2     2     2

size(Y)

ans =

     4     3

whos ans
  Name      Size            Bytes  Class     Attributes

  ans       1x2                16  double              

length(Y)

ans =

     4

whos ans
  Name      Size            Bytes  Class     Attributes

  ans       1x1                 8  double              

for ii=2:2:11 ; disp(ii); end
     2

     4

     6

     8

    10

for ii=2:2:10 ; disp(ii); end
     2

     4

     6

     8

    10

(2:2:10)'

ans =

     2
     4
     6
     8
    10

ii=2; while (ii<=10); disp(ii); ii=ii+2; end
     2

     4

     6

     8

    10

dir

.              
..             
dataex2.m      
ex2cs101f11.m  
exam2.m        
exam2p4.m      
exam2p4a.m     
exam2p6.m      
exam2p7to9.m   
exam2p8.m      
exam2p9.m      
myqz5.m        
myqz6.m        
myqz6a.m       
myqz6b.m       
myqz6c.m       


type exam2p7to9.m

a=exam2p7(5);
exam2p8();
[c d]=exam2p9(40,10)
[a b]=exam2p9(20,10)

type exam2p6.m

fprintf('p6a: For loop\n');
for ii = 1:10 
 disp(ii);
end
fprintf('p6b: while loop\n');
 ii=0;
 while (ii < 10)
  ii=ii+1;
  disp(ii);
 end
fprintf('p6c: No loop\n');
 ii = 1:10 ;
 ii'

clear
dir

.              
..             
dataex2.m      
ex2cs101f11.m  
exam2.m        
exam2p4.m      
exam2p4a.m     
exam2p6.m      
exam2p7to9.m   
exam2p8.m      
exam2p9.m      
myqz5.m        
myqz6.m        
myqz6a.m       
myqz6b.m       
myqz6c.m       


edit in7.m
type in7.m

function y=in7(n)
 for jj=1:n
      my(jj) = jj ^ 4;
 end
 y=my;
end
tic;in7(10000);toc
Elapsed time is 0.010447 seconds.
tic;in7(100000);toc
Elapsed time is 0.031810 seconds.
tic;in7(1000000);toc
Elapsed time is 0.305958 seconds.
tic;in7(10000000);toc
Elapsed time is 3.017622 seconds.
tic;in7(100000000);toc
Elapsed time is 29.779137 seconds.
tic;in7(1000000000);toc
edit in7.m
in7(10000000);
tic;in7(10000000);toc
Elapsed time is 1.094129 seconds.
edit in7.m
tic;in7(10000000);toc
Elapsed time is 0.257897 seconds.
edit in7.m
tic;in7(10000000);toc
Elapsed time is 0.313177 seconds.
tic;in7(10000000);toc
Elapsed time is 0.294437 seconds.
[a b] =exam2(5)

a =

    15


b =

     3

type exam2.m

function [ a b ] = exam2(n)
  a= sum(1:n);
  b= a/n;
end




type myqz5.m

  % myqz5                            This is line 1
function z= myqz5(z)                 %       line 2
  function z= myqz5a (z)             %       line 3
     z= z+z;                         %       line 4
  end                                %       line 5
  function z= myqz5b (z)             %       line 6
     z= z+z+z;                       %       line 7
  end                                %       line 8
  z= myqz5a(z)+myqz5b(z)+myqz5c(z);  %       line 10
  return;                            %       line 11
end                                  %       line 12
function z=myqz5a(z)                 %       line 13
  z= z+z+z+z;                        %       line 14
end                                  %       line 15
function z=myqz5c(z);                %       line 16
  z= myqz5a(z)+z;                    %       line 17
end                                  %       line 18