diary mlP06ratk.txt

Vektorien määrittely:

x =
     1     2     3     4     5
y =
     0     2     4     6
z =
    -4    -2     0     2     4

Ekat laskut:

ans =
    -4    -4     0     8    20
ans =
    20
{??? Error using ==> mtimes
Inner matrix dimensions must agree.
} 

Neliöt:
ans =
     1     4     9    16    25

{??? Error using ==> mpower
Inputs must be a scalar and a square matrix.
} 

Normit:

ans =
    7.4162
ans =
    7.4162
ans =
    7.4162

help normx =
     1     2     3     4     5
y =
     0     2     4     6
z =
    -4    -2     0     2     4
ans =
    -4    -4     0     8    20
ans =
    20
{??? Error using ==> mtimes
Inner matrix dimensions must agree.
} 
x.*z
ans =
    -4    -4     0     8    20
x
x =
     1     2     3     4     5
z
z =
    -4    -2     0     2     4
x.*z
ans =
    -4    -4     0     8    20
x
x =
     1     2     3     4     5
z'
ans =
    -4
    -2
     0
     2
     4
x*z'
ans =
    20
x
x =
     1     2     3     4     5
z
z =
    -4    -2     0     2     4
x*z
{??? Error using ==> mtimes
Inner matrix dimensions must agree.
} 
ans =
     1     4     9    16    25
{??? Error using ==> mpower
Inputs must be a scalar and a square matrix.
} 
ans =
    7.4162
ans =
    7.4162
ans =
    7.4162
help index

index not found.

Use the Help browser search field to <a href="matlab:docsearch index">search the documentation</a>, or
type "<a href="matlab:help help">help help</a>" for help command options, such as help for methods.

com.mathworks.mde.find.FindFiles.invoke
epsi =
  1.1102e-016
eps
ans =
  2.2204e-016
epsi =
  1.1102e-016
ans =
  2.2204e-016
docsearch index
epsi =
  1.1102e-016
ans =
  2.2204e-016
 EPS  Spacing of floating point numbers.
    D = EPS(X), is the positive distance from ABS(X) to the next larger in
    magnitude floating point number of the same precision as X.
    X may be either double precision or single precision.
    For all X, EPS(X) is equal to EPS(ABS(X)).
 
    EPS, with no arguments, is the distance from 1.0 to the next larger double
    precision number, that is EPS with no arguments returns 2^(-52).
 
    EPS('double') is the same as EPS, or EPS(1.0).
    EPS('single') is the same as EPS(single(1.0)), or single(2^-23).
 
    Except for numbers whose absolute value is smaller than REALMIN,
    if 2^E <= ABS(X) < 2^(E+1), then
       EPS(X) returns 2^(E-23) if ISA(X,'single')
       EPS(X) returns 2^(E-52) if ISA(X,'double')
 
    For all X of class double such that ABS(X) <= REALMIN, EPS(X)
    returns 2^(-1074).   Similarly, for all X of class single such that
    ABS(X) <= REALMIN('single'), EPS(X) returns 2^(-149).
 
    Replace expressions of the form
       if Y < EPS * ABS(X)
    with
       if Y < EPS(X)
 
    Example return values from calling EPS with various inputs are
    presented in the table below:
 
          Expression                   Return Value
         ===========================================
          eps(1/2)                     2^(-53)
          eps(1)                       2^(-52)
          eps(2)                       2^(-51)
          eps(realmax)                 2^971
          eps(0)                       2^(-1074)
          eps(realmin/2)               2^(-1074)
          eps(realmin/16)              2^(-1074)
          eps(Inf)                     NaN
          eps(NaN)                     NaN
         -------------------------------------------
          eps(single(1/2))             2^(-24)
          eps(single(1))               2^(-23)
          eps(single(2))               2^(-22)
          eps(realmax('single'))       2^104
          eps(single(0))               2^(-149)
          eps(realmin('single')/2)    2^(-149)
          eps(realmin('single')/16)   2^(-149)
          eps(single(Inf))             single(NaN)
          eps(single(NaN))             single(NaN)
 
    See also <a href="matlab:help realmax">realmax</a>, <a href="matlab:help realmin">realmin</a>.

    Overloaded methods:
       <a href="matlab:help codistributed/eps">codistributed/eps</a>
       <a href="matlab:help qfft/eps">qfft/eps</a>

    Reference page in Help browser
       <a href="matlab:doc eps">doc eps</a>


A =
     4    -5
     2     1
b =
    11
     9
x =
     4
     1
ans =
    11    11
     9     9
A =
    32     1
   -40     1
B =
     0
   -40
ab =
    0.5556
  -17.7778
A =
    32     1
   -40     1
B =
     0
   -40
ab =
    0.5556
  -17.7778
ab =
       5/9     
    -160/9     
A =
      32              1       
     -40              1       
B =
       0       
     -40       
ab =
       5/9     
    -160/9     
ab =
       5/9     
    -160/9     
a =
       5/9     
b =
    -160/9     
{??? Undefined function or variable 'C'.
} 
A =
      32              1       
     -40              1       
B =
       0       
     -40       
ab =
       5/9     
    -160/9     
ab =
       5/9     
    -160/9     
a =
       5/9     
b =
    -160/9     
ans =
[ C, (5*F)/9 - 160/9]
eps
ans =
       1/4503599627370496
num2str(a)
ans =
0.55556
a
a =
       5/9