diary-2008-03-13

roots([1 5 6])

ans =

   -3.0000
   -2.0000

roots([1 4 4])

ans =

    -2
    -2

roots([1 2 5])

ans =

  -1.0000 + 2.0000i
  -1.0000 - 2.0000i

200*200

ans =

       40000

sqrt(20000)

ans =

  141.4214

a=eye(200);
whos a
  Name        Size              Bytes  Class     Attributes

  a         200x200            320000  double              


ans =

diary-2008-03-13

c1 =4 + i*3

c1 =

   4.0000 + 3.0000i

c1 = 4 + 3i

c1 =

   4.0000 + 3.0000i

clear
i=2

i =

     2

4+i*3

ans =

    10

4+3i

ans =

   4.0000 + 3.0000i


Ex14_1
Enter the coefficient a: 1
Enter the coefficient b: 5
Enter the coefficient c: 6
The roots of this equation are:
x1 = (-2.000000) +i (0.000000)
x2 = (-3.000000) +i (0.000000)

Ex14_1
Enter the coefficient a: 1
Enter the coefficient b: 4
Enter the coefficient c: 4
The roots of this equation are:
x1 = (-2.000000) +i (0.000000)
x2 = (-2.000000) +i (0.000000)

Ex14_1
Enter the coefficient a: 1
Enter the coefficient b: 2
Enter the coefficient c: 5
The roots of this equation are:
x1 = (-1.000000) +i (2.000000)
x2 = (-1.000000) +i (-2.000000)


clear

lect14_1
Warning:
Imaginary
parts of
complex
X and/or
Y
arguments
ignored
> In <a href="error:/Users/ausas/Documents/CS4/MATLAB/work/lect14_1.m,8,1">lect14_1 at 8</a>

lect14_2

result =

String 1String 2


result =

Long string 1 
String 2      


ans =

     0


ans =

     1


ans =

     1

End of script lect14_2.
s = 'a'

s =

a

double(s)

ans =

    97

double('b')

ans =

    98

double('A')

ans =

    65

double('B')

ans =

    66


lect14_3

result =

     0     1     0     1


a =

  Columns 1 through 4

     1     1     1     1

  Columns 5 through 8

     0     0     0     1


a =

  Columns 1 through 4

     0     0     0     0

  Columns 5 through 8

     1     0     0     0


a =

  Columns 1 through 4

     0     0     0     0

  Columns 5 through 8

     0     1     1     0


a =

  Columns 1 through 4

     0     1     1     1

  Columns 5 through 8

     0     0     0     1


pos =

     3     6


result =

     1
     3

End of script lect14_3.

lect14_4

result =

This is a pest!


token =

This


remainder =

 is a test!


result =

THIS IS A TEST 1!


result =

this is a test 2!


test =

     This is a test.   


ans =

    23


trim1 =

     This is a test.


ans =

    20


trim2 =

This is a test.


lect14_5

y =

5317

Name      Size            Bytes  Class     Attributes

  x         1x1                 8  double              
  y         1x4                 8  char                


p =

3.1416


p =

3.141593


p =

3.14159e+00



s =

The value of pi = 3.141593.




b =

    6.2832


  Name      Size            Bytes  Class     Attributes

  a         1x12               24  char                
  b         1x1                 8  double              




b =

    3.1416




v1 =

    3.1416



v2 =

     3


lect14_6

a =

  Columns 1 through 4

     1     0     0     0
     0     1     0     0
     0     0     1     0
     0     0     0     1
     0     0     0     0
     0     0     0     0
     0     0     0     0
     0     0     0     0
     0     0     0     0
     0     0     0     0

  Columns 5 through 8

     0     0     0     0
     0     0     0     0
     0     0     0     0
     0     0     0     0
     1     0     0     0
     0     1     0     0
     0     0     1     0
     0     0     0     1
     0     0     0     0
     0     0     0     0

  Columns 9 through 10

     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     1     0
     0     1


a_sparse =

   (1,1)        1
   (2,2)        1
   (3,3)        1
   (4,4)        1
   (5,5)        1
   (6,6)        1
   (7,7)        1
   (8,8)        1
   (9,9)        1
  (10,10)       1

  Name           Size            Bytes  Class     Attributes

  a             10x10              800  double              
  a_sparse      10x10              164  double    sparse    


lect14_6

a =

  Columns 1 through 9

     1     0     0     0     0     0     0     0     0
     0     1     0     0     0     0     0     0     0
     0     0     1     0     0     0     0     0     0
     0     0     0     1     0     0     0     0     0
     0     0     0     0     1     0     0     0     0
     0     0     0     0     0     1     0     0     0
     0     0     0     0     0     0     1     0     0
     0     0     0     0     0     0     0     1     0
     0     0     0     0     0     0     0     0     1
     0     0     0     0     0     0     0     0     0

  Column 10

     0
     0
     0
     0
     0
     0
     0
     0
     0
     1


a_sparse =

   (1,1)        1
   (2,2)        1
   (3,3)        1
   (4,4)        1
   (5,5)        1
   (6,6)        1
   (7,7)        1
   (8,8)        1
   (9,9)        1
  (10,10)       1

  Name           Size            Bytes  Class     Attributes

  a             10x10              800  double              
  a_sparse      10x10              164  double    sparse    


lect14_7







a = 

    [3x3 double]    [1x22 char]
    [2x2 double]             []







 
a{1,1} =
 
     1     3    -7
     2     0     6
     0     5     1

 
 
a{2,1} =
 
  Column 1

   3.0000 + 4.0000i
        0 -10.0000i

  Column 2

  -5.0000          
   3.0000 - 4.0000i

 
 
a{1,2} =
 
This is a text string.
 
 
a{2,2} =
 
     []
 


a = 

  Column 1

    [3x3 double]
    [2x2 double]

  Column 2

    [1x22 char]
             []




a = 

  Column 1

    [3x3 double]

  Column 2

    [1x22 char]



c = 

  Column 1

    [2x2 double]
    'cats'      

  Column 2

    'dogs'       
    [0 + 1.0000i]



ans =

     1     2
     3     4



ans =

cats



ans =

     2






cellstring = 

  Column 1

    'Alan M. Usas'

  Column 2

    'Male'

  Column 3

    'SSN 999-99-9999'



data =

Line 1         
Additional Line



c = 

    'Line 1'
    'Additional Line'



newdata =

Line 1         
Additional Line



Ex14_2
Text: c
Text: b
Text: a
Text: 
ans = 

  Columns 1 through 2

    'a'    'b'

  Column 3

    'c'


lect14_9








student = 

       name: [1x8 char]
    address: [1x15 char]
       city: [1x7 char]
      state: 'LA'
        zip: [1x5 char]








student = 

1x2 struct array with fields:
    name
    address
    city
    state
    zip



ans = 

       name: [1x8 char]
    address: [1x15 char]
       city: [1x7 char]
      state: 'LA'
        zip: [1x5 char]



ans = 

       name: [1x11 char]
    address: [1x16 char]
       city: [1x8 char]
      state: 'NY'
        zip: [1x5 char]




student = 

1x1000 struct array with fields:
    name
    address
    city
    state
    zip



student = 

1x1000 struct array with fields:
    name
    address
    city
    state
    zip
    exams



student2 = 

1x1000 struct array with fields:
    name
    address
    city
    state
    exams