How i can form Array List

Hi,

I am new for mat-lab , how i can want to make Array List form ? below example

for int i=1:20
X = 1;
Y=2;
X1 =4;
Y2 =5;
X2 =6;
Y2 =7;
end

Output i would like to store like : matrix =[[1,2],[4,5],[6,7]];

Answer 1

[Walter Roberson]

MATLAB does not have array lists exactly like that. It has cell arrays which are similar.

matrix = {[X Y]; [X1 Y1]; [X2 Y2]}

[SAMEER ahamed]

Thanks for reply me . continuous looping values are stored in 8-by-1 matrix with comma any idea ?. below example like.

if true
  % code
matrix=[[414, 313, 398, 313, 406, 293, 406, 314], [448, 317, 371, 312, 410, 293, 410, 329],
[412, 312, 397, 311, 405, 293, 405, 312], [414, 311, 395, 310, 405, 292, 405, 312], 
[414, 310, 397, 310, 406, 292, 406, 312], [446, 314, 373, 309, 410, 291, 410, 326],
[448, 314, 371, 310, 410, 291, 410, 329], [412, 309, 392, 307, 402, 290, 402, 309],
[449, 313, 374, 282, 412, 289, 412, 323], [452, 311, 377, 307, 415, 288, 415, 327],
[446, 313, 370, 309, 408, 290, 408, 324]]];
end

[Walter Roberson]

numrow = 20;
matrix = cell(numrow, 20);
for Row = 1 : numrow
  val1 = rand; val2 = rand; val3 = rand; vals = rand(5,1);
  matrix{row} = [val1; val2; val3; vals];
end

Note that what you showed is a 1 x 8 rather than the 8 x 1 you indicate is required.

[SAMEER ahamed]

Thank's for reply me . i have tried ,but i need to store single array cell?

I got result like :

Step 1 :

left_distance_X
          22

left_distance_Y
          19

right_distance_X
          71

right_distance_Y
          19

upper_distance_X
          45

upper_distance_Y
           6

right_distance_Y
          45

bottom_distance_Y
          35

Matrix
          22
          19
          71
          19
          45
           6
          45
          35
left_distance_X
          26

left_distance_Y
          23

right_distance_X
          72

right_distance_Y
          23

upper_distance_X
          47

upper_distance_Y
          11

right_distance_Y
          47

bottom_distance_Y
          36

Matrix
          26
          23
          72
          23
          47
          11
          47
          36

how to get single like : matrix =[[ 22,19,71,19,45,6,45,35],[26,23,72,23,47,11,47,36]];

Note: For that trainee data , pattern matching using machine algorithm weka and SVM .

[SAMEER ahamed]

Thank's for reply me . please let me know how i can form like?for understanding please look at my previous forum?

if true
  % code
matrix =[[ 22,19,71,19,45,6,45,35],[26,23,72,23,47,11,47,36]];
end

[Walter Roberson]

You cannot get that. MATLAB does not support [[xxx]] notation for nested lists. The closest you can get is

matrix = cell(1, 2);

step = 1;

left_distance_X = 22;
left_distance_Y = 19;
right_distance_X = 71;
right_distance_Y = 19;
upper_distance_X = 45;
upper_distance_Y = 6;  
right_distance_Y = 45;
bottom_distance_Y = 35;

matrix{1, step} = [left_distance_X, left_distance_Y, right_distance_X, right_distance_Y, upper_distance_X, upper_distance_Y, right_distance_Y, bottom_distance_Y];

step = 2;

left_distance_X = 26;
left_distance_Y = 23;
right_distance_X = 72;
right_distance_Y = 23;
upper_distance_X = 47;
upper_distance_Y = 11;  
right_distance_Y = 47;
bottom_distance_Y = 36;

matrix{1, step} = [left_distance_X, left_distance_Y, right_distance_X, right_distance_Y, upper_distance_X, upper_distance_Y, right_distance_Y, bottom_distance_Y];

Note: this is not what SVM would use! SVM uses 2D numeric arrays, not list-of-arrays or nested-list. For 2D numeric arrays, use

matrix = zeros(2, 8);

step = 1;

left_distance_X = 22;
left_distance_Y = 19;
right_distance_X = 71;
right_distance_Y = 19;
upper_distance_X = 45;
upper_distance_Y = 6;  
right_distance_Y = 45;
bottom_distance_Y = 35;

matrix(step,:) = [left_distance_X, left_distance_Y, right_distance_X, right_distance_Y, upper_distance_X, upper_distance_Y, right_distance_Y, bottom_distance_Y];

step = 2;

left_distance_X = 26;
left_distance_Y = 23;
right_distance_X = 72;
right_distance_Y = 23;
upper_distance_X = 47;
upper_distance_Y = 11;  
right_distance_Y = 47;
bottom_distance_Y = 36;

matrix(step,:) = [left_distance_X, left_distance_Y, right_distance_X, right_distance_Y, upper_distance_X, upper_distance_Y, right_distance_Y, bottom_distance_Y];

[SAMEER ahamed]

thank's for reply me , now i have got result like ?

if true
  % code

for i=1:2

disp(matrix{1,i}); %here matrix{1,i}=[left_distance_X, left_distance_Y, right_distance_X, right_distance_Y, upper_distance_X, upper_distance_Y, right_distance_Y, bottom_distance_Y];
%Here result -1  like Matrix
          30
          23
          77
          23
          53
           8
          53
          35
%Here result-2 like
31
          25
          72
          25
          46
          15
          46
          42

%Here I have tried up to int child node ,after looping of every 1-by-8 matrix

dt = datestr(now,'mm-dd-yy-HH:MM:SS.FFF-AM');
    combinedStr = strcat('Hello',dt);
     disp(combinedStr);
        docNode = com.mathworks.xml.XMLUtils.createDocument('lipreading');
       docRootNode = docNode.getDocumentElement;
       thisElement = docNode.createElement('id');
       thisElement.appendChild(docNode.createTextNode(combinedStr));
       docRootNode.appendChild(thisElement);
         matrix_thisElement = docNode.createElement('matrix');
        vector_thisElement = docNode.createElement('vector');
        left_int_thisElement = docNode.createElement('int');
*%Here I would like to call Looping stored each 1-by-8 matrix values*
 docRootNode.appendChild(left_int_thisElement);
        docRootNode.appendChild(vector_thisElement);
        docRootNode.appendChild(matrix_thisElement);
        xmlFileName =['tempname','.xml'];
    xmlwrite(xmlFileName,docNode);
    edit(xmlFileName);
end
end
*Note : I would like to write XML to form like below ?*
if true
  % code
<vector>
  <int>3</int>
  <int>-99</int>
  <int>-6</int>
  <int>79</int>
  <int>-195</int>
  <int>11</int>
  <int>197</int>
  <int>8</int>
</vector>
<vector>
  <int>4</int>
  <int>-99</int>
  <int>-5</int>
  <int>79</int>
  <int>-195</int>
  <int>12</int>
  <int>196</int>
  <int>9</int>
</vector>
<vector>
end

[SAMEER ahamed]

Hi,

       I am new for matlab , now i have 10 frames video file , each frame values i need to stored in xml file ?
I have Matlab Code Below like :
for i=1:10
matrix{1,i}=[leftx,lefty,rightx,righty,uppertx,uppery,bottomx,bottomy];%1-by-8 matrix
end
Below format i want to stored values  please let me know how i can format like ?
example : 
<reading>
<id>id1</id>
<matrix class="vector">
<vector>
<int>2</int>
<int>1</int>
<int>44</int>
<int>45</int>
<int>42</int>
<int>24</int>
<int>14</int>
<int>84</int>
</vector>
<vector>
<int>7</int>
<int>31</int>
<int>674</int>
<int>455</int>
<int>2</int>
<int>24</int>
<int>4</int>
<int>84</int>
</vector>
</matrix>
</reading>