How can I assign a number to another number and then create sequences in which I can swap them at will?

Hi guys!

I have a sequence of numbers which I want to assign to another sequence of numbers:

numbers=1:40;
numbers_b=[11:14, 21:24, 31:34, 41:44, 51:54, 61:64, 71:74, 81:84, 91:94, 101:104];

assigned=[numbers; numbers_b]'

assigned =

     1    11
     2    12
     3    13
     4    14
     5    21
     6    22
     7    23
     8    24
     9    31
    10    32
    11    33
    12    34
    13    41
    14    42
    15    43
    16    44
    17    51
    18    52
    19    53
    20    54
    21    61
    22    62
    23    63
    24    64
    25    71
    26    72
    27    73
    28    74
    29    81
    30    82
    31    83
    32    84
    33    91
    34    92
    35    93
    36    94
    37   101
    38   102
    39   103
    40   104

Now I want these assignments to be fixed. I have a certain sequence of numbers_b (second column) and I'd like to have a column with the corresponding numbers of numbers (first column).

Example: My sequence starts with 82 11 23 53 82 .....

That would mean I get 30 1 7 19 30 .....

Furthermore, my sequence contains 160 numbers of numbers_b.

Does anybody know how that could be done?

Thanks in advance!

R

Answer 1

[Ameer Hamza]

Check this code

numbers=1:40;
numbers_b=[11:14, 21:24, 31:34, 41:44, 51:54, 61:64, 71:74, 81:84, 91:94, 101:104];
assigned=[numbers; numbers_b]';

x = [82 11 63 53 82]; % I guess 3rd number is supposed to be 63 in your question
[~, idx] = ismember(x, assigned(:,2));
y = assigned(idx, 1);

[Rupert Steinmeier]

Works perfectly, thank you very much for your quick reply Ameer!

[Ameer Hamza]

I am glad to be of help!

[Rupert Steinmeier]

The third number (23) is supposed to be 23 but the assigned number should be 7, not 63!

Very attentive! :)