Hi Monks, Ok, so I have a table of mapped IDs. It contains 3 fields: project_id, variable_id and symbol_id. The relationships are: project_id 1..* variable_id variable_id 1..1 symbol_id The following is a simple example: 
p_id | v_id | s_id
  1  |  1   |  1
  2  |  1   |  2
  3  |  1   |  3
  4  |  1   |  4
  1  |  2   |  5
  2  |  2   |  6
  3  |  2   |  7
  4  |  2   |  8
  2  |  3   |  9
  4  |  3   |  10
  1  |  4   |  11
  2  |  4   |  12
  4  |  4   |  13
  3  |  5   |  14

[download]
this would be stored in an AoA called @results, where each row is an array of project_id, variable_id and symbol_id, where a row is an element of @results. From this I would like to create a table like so: 
     | p_1  | p_2  | p_3  | p_4  |
---------------------------------
 v_1 | s_1  | s_2  | s_3  | s_4  |
 v_2 | s_5  | s_6  | s_7  | s_8  |
 v_3 |      | s_9  |      | s_10 |
 v_4 | s_11 | s_12 |      | s_13 |
 v_5 |      |      | s_14 |      |

[download]
It doesnt matter too much if the pipelines are there or not, I just need the data aligned for easy reading. At the moment I use nested for loops to generate this. This becomes a problem when a symbol doesnt exist for a particular variable in a project. The way it works is it appends a symbol to a string named $row when it exists...if it doesnt nothing happens, so I get something like the following table... 
     | p_1  | p_2  | p_3  | p_4  |
---------------------------------
 v_1 | s_1  | s_2  | s_3  | s_4  |
 v_2 | s_5  | s_6  | s_7  | s_8  |
 v_3 | s_9  | s_10 |
 v_4 | s_11 | s_12 | s_13 |
 v_5 | s_14 |

[download]
Any ideas how I might solve this? Thanks, Steve

In reply to Create a table from a matrix by Anonymous Monk

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