x = linspace(0,2*pi,100)

x =

  Columns 1 through 7

         0    0.0635    0.1269    0.1904    0.2539    0.3173    0.3808

  Columns 8 through 14

    0.4443    0.5077    0.5712    0.6347    0.6981    0.7616    0.8251

  Columns 15 through 21

    0.8885    0.9520    1.0155    1.0789    1.1424    1.2059    1.2693

  Columns 22 through 28

    1.3328    1.3963    1.4597    1.5232    1.5867    1.6501    1.7136

  Columns 29 through 35

    1.7771    1.8405    1.9040    1.9675    2.0309    2.0944    2.1579

  Columns 36 through 42

    2.2213    2.2848    2.3483    2.4117    2.4752    2.5387    2.6021

  Columns 43 through 49

    2.6656    2.7291    2.7925    2.8560    2.9195    2.9829    3.0464

  Columns 50 through 56

    3.1099    3.1733    3.2368    3.3003    3.3637    3.4272    3.4907

  Columns 57 through 63

    3.5541    3.6176    3.6811    3.7445    3.8080    3.8715    3.9349

  Columns 64 through 70

    3.9984    4.0619    4.1253    4.1888    4.2523    4.3157    4.3792

  Columns 71 through 77

    4.4427    4.5061    4.5696    4.6331    4.6965    4.7600    4.8235

  Columns 78 through 84

    4.8869    4.9504    5.0139    5.0773    5.1408    5.2043    5.2677

  Columns 85 through 91

    5.3312    5.3947    5.4581    5.5216    5.5851    5.6485    5.7120

  Columns 92 through 98

    5.7755    5.8389    5.9024    5.9659    6.0293    6.0928    6.1563

  Columns 99 through 100

    6.2197    6.2832

myImage = sin(x)' * cos(x);
whos
  Name             Size             Bytes  Class     Attributes

  ans              4x7                224  double              
  laplacian        5x5                200  double              
  myImage        100x100            80000  double              
  x                1x100              800  double              

myImage = (myImage +1) * 32;
figure(1);colormap(gray);axis off;axis equal;
image(myImage)
axis off;
myImage(3:13,:) = 0;
image(myImage)
myImage(:,3:13) = 64;
image(myImage)
border = ones(size(myImage,1),15) * 52;
image([myImage, border, myImage])
axis off; axis equal;
image([myImage, border, flipup(myImage)])
{Undefined function 'flipup' for input arguments of type 'double'.
} 
image([myImage, border, flipud(myImage)])
image([myImage, border, fliplr(myImage)])
image([myImage, border, rot90(myImage)])
axis off; axis equal;
image([myImage, border, triu(myImage)])
image([myImage, border, tril(myImage)])
result = repmat(myImage, 3,4);
image(repmat(myImage,3,4))
image(repmat(myImage,10,100))
clc
myArray = rand(3,4)

myArray =

    0.6177    0.5767    0.8865    0.1679
    0.8594    0.1829    0.0287    0.9787
    0.8055    0.2399    0.4899    0.7127

myArray = randi(10,3,4)

myArray =

     6     7     6     9
     5     1     1     8
     1     1     9     2

reshape(myArray,2,6)

ans =

     6     1     1     6     9     8
     5     7     1     1     9     2

myArray2 = randi(10,3,4)

myArray2 =

     7     7     5     2
     6     9     9     2
    10     5     1     4

myArray

myArray =

     6     7     6     9
     5     1     1     8
     1     1     9     2

myArray3(1:2:2*size(myArray,1),:) = myArray

myArray3 =

     6     7     6     9
     0     0     0     0
     5     1     1     8
     0     0     0     0
     1     1     9     2

myArray3(2:2:2*size(myArray,1),:) = myArray2

myArray3 =

     6     7     6     9
     7     7     5     2
     5     1     1     8
     6     9     9     2
     1     1     9     2
    10     5     1     4

A1 = myArray;
A2 = myArray2;
A3 = reshape([A1(:)';A2(:)'],size(A1).*[2,1])

A3 =

     6     7     6     9
     7     7     5     2
     5     1     1     8
     6     9     9     2
     1     1     9     2
    10     5     1     4

A1(:)

ans =

     6
     5
     1
     7
     1
     1
     6
     1
     9
     9
     8
     2

A1(:)'

ans =

     6     5     1     7     1     1     6     1     9     9     8     2

A2(:)'

ans =

     7     6    10     7     9     5     5     9     1     2     2     4

myArray

myArray =

     6     7     6     9
     5     1     1     8
     1     1     9     2

find(myArray)

ans =