Отчет по теме 1

Пахомов Илья, А-03-24

1 Изучение среды GNU Octave

2 Настройка текущего каталога

Нажал на окно рядом с Текущая папка: и установил путь к папке ТЕМА1:

3 Настроил предложение «Окно».

4 Отобразил список файлов, размещённых в текущей папке

5 Изучил работу систем помощи

6 Создание матриц и векторов


>> A=randn(4,6)
A =

   0.604425   0.467559   0.210945   0.101826  -0.697722  -0.457551
  -0.593429   1.472239  -1.540640  -0.095893   0.881864   0.508873
  -0.729307   0.637046  -0.271485   0.132082   1.452585   1.625484
   1.310112  -0.050250  -1.202923  -0.501098  -1.113930   1.599730

>> B=rand(4,7)
B =

   7.4235e-02   7.7887e-01   1.9481e-02   1.6233e-02   6.3604e-01   5.6349e-03   2.1646e-01
   2.0576e-01   3.7398e-02   4.7933e-01   1.4731e-01   4.0984e-01   2.8150e-01   6.4308e-01
   7.3637e-01   2.2485e-01   7.6445e-01   9.7867e-01   2.3870e-03   5.1378e-01   9.0480e-01
   4.1237e-01   5.2761e-01   4.9420e-01   3.8474e-01   6.0314e-01   3.2191e-01   7.3812e-01

>> C=4:27
C =

    4    5    6    7    8    9   10   11   12   13   14   15   16   17   18   19   20   21   22   23   24   25   26   27

>> H='This is a symbols vector'
H = This is a symbols vector

>> L=[-2+23.1j, 3-5.6j]
L =

   -2.0000 + 23.1000i    3.0000 -  5.6000i

7 Выполнил следующие операции


 D=reshape(C,[],6)
D =

    4    8   12   16   20   24
    5    9   13   17   21   25
    6   10   14   18   22   26
    7   11   15   19   23   27

>> E=B'*A
E =

  -0.074012   0.786010  -0.997306  -0.121551   0.739933   1.927378
   0.975826   0.535953  -0.589034  -0.158964  -0.771571   0.872175
  -0.182735   1.176948  -1.536379  -0.190652   0.969032   2.268178
  -0.287301   0.828586  -0.952033  -0.076002   1.111604   2.273822
   0.929671   0.871975  -1.223421  -0.276453  -0.750748   0.886278
  -0.116602   0.728187  -0.959212  -0.119869   0.632026   1.490773
   0.056355   1.587275  -2.078630  -0.289989   0.908164   2.879735

>> F=[A,B]
F =

 Columns 1 through 10:

   6.0443e-01   4.6756e-01   2.1095e-01   1.0183e-01  -6.9772e-01  -4.5755e-01   7.4235e-02   7.7887e-01   1.9481e-02   1.6233e-02
  -5.9343e-01   1.4722e+00  -1.5406e+00  -9.5893e-02   8.8186e-01   5.0887e-01   2.0576e-01   3.7398e-02   4.7933e-01   1.4731e-01
  -7.2931e-01   6.3705e-01  -2.7148e-01   1.3208e-01   1.4526e+00   1.6255e+00   7.3637e-01   2.2485e-01   7.6445e-01   9.7867e-01
   1.3101e+00  -5.0250e-02  -1.2029e+00  -5.0110e-01  -1.1139e+00   1.5997e+00   4.1237e-01   5.2761e-01   4.9420e-01   3.8474e-01

 Columns 11 through 13:

   6.3604e-01   5.6349e-03   2.1646e-01
   4.0984e-01   2.8150e-01   6.4308e-01
   2.3870e-03   5.1378e-01   9.0480e-01
   6.0314e-01   3.2191e-01   7.3812e-01

>> G=A.*D
G =

    2.4177    3.7405    2.5313    1.6292  -13.9544  -10.9812
   -2.9671   13.2501  -20.0283   -1.6302   18.5191   12.7218
   -4.3758    6.3705   -3.8008    2.3775   31.9569   42.2626
    9.1708   -0.5527  -18.0438   -9.5209  -25.6204   43.1927

>> M=G./4.5
M =

   0.5373   0.8312   0.5625   0.3620  -3.1010  -2.4403
  -0.6594   2.9445  -4.4507  -0.3623   4.1154   2.8271
  -0.9724   1.4157  -0.8446   0.5283   7.1015   9.3917
   2.0380  -0.1228  -4.0097  -2.1157  -5.6934   9.5984

>> DDD=D.^3
DDD =

      64     512    1728    4096    8000   13824
     125     729    2197    4913    9261   15625
     216    1000    2744    5832   10648   17576
     343    1331    3375    6859   12167   19683

>> DL=D>=20
DL =

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

>> Dstolb=D(:)
Dstolb =

    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27

8 Изучил некоторые стандартные функции


>> B1=sqrt(B)
B1 =

   0.272462   0.882539   0.139574   0.127408   0.797520   0.075066   0.465248
   0.453605   0.193385   0.692336   0.383809   0.640184   0.530562   0.801920
   0.858118   0.474180   0.874326   0.989276   0.048857   0.716781   0.951210
   0.642164   0.726369   0.702991   0.620275   0.776622   0.567372   0.859139

>> B2=log(B)
B2 =

  -2.600514  -0.249906  -3.938323  -4.120724  -0.452496  -5.178784  -1.530371
  -1.581058  -3.286145  -0.735369  -1.915222  -0.891998  -1.267637  -0.441493
  -0.306028  -1.492338  -0.268605  -0.021564  -6.037712  -0.665968  -0.100042
  -0.885822  -0.639396  -0.704822  -0.955186  -0.505604  -1.133479  -0.303648

>> B3=sin(B)
B3 =

   7.4167e-02   7.0248e-01   1.9480e-02   1.6232e-02   5.9401e-01   5.6348e-03   2.1477e-01
   2.0431e-01   3.7389e-02   4.6118e-01   1.4678e-01   3.9846e-01   2.7779e-01   5.9966e-01
   6.7160e-01   2.2296e-01   6.9214e-01   8.2975e-01   2.3870e-03   4.9147e-01   7.8630e-01
   4.0079e-01   5.0347e-01   4.7432e-01   3.7532e-01   5.6723e-01   3.1638e-01   6.7290e-01
>> k=length(B1)
k = 7
>> nm=size(B1)
nm =

   4   7

>> elem=numel(B1)
elem = 28
>> NN=linspace(11.5,34.1,20)
NN =

 Columns 1 through 15:

   11.500   12.689   13.879   15.068   16.258   17.447   18.637   19.826   21.016   22.205   23.395   24.584   25.774   26.963   28.153

 Columns 16 through 20:

   29.342   30.532   31.721   32.911   34.100

>> FF=ones(2,4)
FF =

   1   1   1   1
   1   1   1   1

>> GG=zeros(5)
GG =

   0   0   0   0   0
   0   0   0   0   0
   0   0   0   0   0
   0   0   0   0   0
   0   0   0   0   0

>> B1D=diag(B1)
B1D =

   0.2725
   0.1934
   0.8743
   0.6203

>> DB=diag(B1D)
DB =

Diagonal Matrix

   0.2725        0        0        0
        0   0.1934        0        0
        0        0   0.8743        0
        0        0        0   0.6203

>> BS1=sort(B)
BS1 =

   7.4235e-02   3.7398e-02   1.9481e-02   1.6233e-02   2.3870e-03   5.6349e-03   2.1646e-01
   2.0576e-01   2.2485e-01   4.7933e-01   1.4731e-01   4.0984e-01   2.8150e-01   6.4308e-01
   4.1237e-01   5.2761e-01   4.9420e-01   3.8474e-01   6.0314e-01   3.2191e-01   7.3812e-01
   7.3637e-01   7.7887e-01   7.6445e-01   9.7867e-01   6.3604e-01   5.1378e-01   9.0480e-01

>> BS2=sortrows(B,2)
BS2 =

   2.0576e-01   3.7398e-02   4.7933e-01   1.4731e-01   4.0984e-01   2.8150e-01   6.4308e-01
   7.3637e-01   2.2485e-01   7.6445e-01   9.7867e-01   2.3870e-03   5.1378e-01   9.0480e-01
   4.1237e-01   5.2761e-01   4.9420e-01   3.8474e-01   6.0314e-01   3.2191e-01   7.3812e-01
   7.4235e-02   7.7887e-01   1.9481e-02   1.6233e-02   6.3604e-01   5.6349e-03   2.1646e-01

>> DS1=sum(D)
DS1 =

    22    38    54    70    86   102

>> DS2=sum(D,2)
DS2 =

    84
    90
    96
   102

>> DP1=prod(D)
DP1 =

      840     7920    32760    93024   212520   421200

>> dt=det(A*A')
dt = 79.346
>> dinv=inv(A*A')
dinv =

   1.711006  -0.207065   0.719828  -0.120793
  -0.207065   0.331898  -0.291950  -0.015622
   0.719828  -0.291950   0.612827  -0.036756
  -0.120793  -0.015622  -0.036756   0.150286

9 Поработал с индексацией элементов матриц.


>> D1=D(3,5)
D1 = 22
>> D2=D(3,4:end)
D2 =

   18   22   26

>> D3=D(2:3,3:5)
D3 =

   13   17   21
   14   18   22

>> D4=D(16:20)
D4 =

   19   20   21   22   23

>> D5=D(3:4,[1,3,6])
D5 =

    6   14   26
    7   15   27

10 Изучил некоторые управляющие конструкции для использования в программах на m-языке

цикл по перечислению:
>> Dsum=0
Dsum = 0
>> for i=1:6
Dsum=Dsum+sqrt(D(2,i))
endfor
Dsum = 2.2361
Dsum = 5.2361
Dsum = 8.8416
Dsum = 12.965
Dsum = 17.547
Dsum = 22.547

цикл пока выполняется условие:
 Dsum2=0;i=1
i = 1
>> while (D(i)<22)
Dsum2=Dsum2+sin(D(i))
i=i+1
endwhile
Dsum2 = -0.7568
i = 2
Dsum2 = -1.7157
i = 3
Dsum2 = -1.9951
i = 4
Dsum2 = -1.3382
i = 5
Dsum2 = -0.3488
i = 6
Dsum2 = 0.063321
i = 7
Dsum2 = -0.4807
i = 8
Dsum2 = -1.4807
i = 9
Dsum2 = -2.0173
i = 10
Dsum2 = -1.5971
i = 11
Dsum2 = -0.6065
i = 12
Dsum2 = 0.043799
i = 13
Dsum2 = -0.2441
i = 14
Dsum2 = -1.2055
i = 15
Dsum2 = -1.9565
i = 16
Dsum2 = -1.8066
i = 17
Dsum2 = -0.8937
i = 18
Dsum2 = -0.057011
i = 19

условие if:
 if (D(3,5)>=20)
printf('D(3,5)>=20')
else
printf('D(3,5)<20')
endif
D(3,5)>=20