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Added queries in doc of line Graph for undirected graph #904

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Aug 16, 2017
Merged

Added queries in doc of line Graph for undirected graph #904

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3 changes: 0 additions & 3 deletions doc/lineGraph/pgr_lineGraph.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -30,9 +30,6 @@ Given a graph G, its line graph L(G) is a graph such that:-
- two vertices of L(G) are adjacent if and only if their corresponding edges
share a common endpoint in G.

The current implementation only works for the `directed graph`.


The following figures show a graph (left, with blue vertices) and its
Line Graph (right, with green vertices).

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91 changes: 30 additions & 61 deletions doc/queries/doc-pgr_lineGraph.queries
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Original file line number Diff line number Diff line change
@@ -1,16 +1,17 @@
-BEGIN;
-BEGIN
--- q1
-SELECT * FROM edge_table1;
-SELECT * FROM edge_table;
- ID | source | target | cost | reverse_cost
-----+--------+--------+------+--------------
- 1 | 1 | 2 | 1 | 1
- 2 | 2 | 3 | -1 | 1
- 3 | 3 | 4 | -1 | 1
- 4 | 2 | 5 | 1 | 1
-(4 rows)
-
-SELECT * FROM pgr_lineGraph(
- 'SELECT id, source, target, cost, reverse_cost FROM edge_table1'
- 'SELECT id, source, target, cost, reverse_cost FROM edge_table'
-);
- seq | source | target | cost | reverse_cost
------+--------+--------+------+--------------
Expand All @@ -19,80 +20,48 @@
- 3 | -2 | -1 | 1 | -1
- 4 | -2 | 4 | 1 | -1
-(4 rows)
-
--- q2
-SELECT * FROM edge_table2;
-SELECT * FROM edge_table;
- ID | source | target | cost | reverse_cost
-----+--------+--------+------+--------------
- 1 | 1 | 2 | 10 | -1
- 2 | 2 | 1 | 25 | -1
- 3 | 2 | 3 | 20 | 25
- 1 | 1 | 2 | 1 | 1
- 2 | 2 | 3 | -1 | 1
- 3 | 3 | 4 | -1 | 1
-(3 rows)
-
-SELECT * FROM pgr_lineGraph(
- 'SELECT id, source, target, cost, reverse_cost FROM edge_table2',
- true
- 'SELECT id, source, target, cost, reverse_cost FROM edge_table',
- FALSE
-);
- seq | source | target | cost | reverse_cost
------+--------+--------+------+--------------
- 1 | -3 | 2 | 1 | -1
- 2 | 1 | 3 | 1 | -1
- 3 | 2 | 1 | 1 | 1
-(3 rows)
- 1 | -2 | -1 | 1 | -1
- 2 | -2 | 1 | 1 | -1
- 3 | 1 | -2 | 1 | -1
- 4 | -1 | -2 | 1 | -1
- 5 | -3 | -2 | 1 | -1
- 6 | -2 | -3 | 1 | -1
-(6 rows)
-
--- q3
-SELECT * FROM edge_table3;
-SELECT * FROM edge_table;
- ID | source | target | cost | reverse_cost
-----+--------+--------+------+--------------
- 1 | 1 | 2 | 1 | 1
- 2 | 2 | 3 | -1 | 1
- 3 | 3 | 4 | -1 | 1
- 4 | 2 | 5 | 1 | 1
- 5 | 3 | 6 | 1 | -1
- 6 | 7 | 8 | 1 | 1
- 7 | 8 | 5 | 1 | 1
- 8 | 5 | 6 | 1 | 1
- 9 | 6 | 9 | 1 | 1
- 10 | 5 | 10 | 1 | 1
- 11 | 6 | 11 | 1 | -1
- 12 | 10 | 11 | 1 | -1
- 13 | 11 | 12 | 1 | -1
- 14 | 10 | 13 | 1 | 1
- 15 | 9 | 12 | 1 | 1
- 16 | 4 | 9 | 1 | 1
- 17 | 14 | 15 | 1 | 1
- 18 | 16 | 17 | 1 | 1
- 1 | 1 | 2 | 10 | -1
- 2 | 2 | 1 | 25 | -1
- 3 | 2 | 3 | 20 | 25
-(3 rows)
-
-SELECT * FROM pgr_lineGraph(
- 'SELECT id, source, target, cost, reverse_cost FROM edge_table3'
- 'SELECT id, source, target, cost, reverse_cost FROM edge_table'
-);
- seq | source | target | cost | reverse_cost
------+--------+--------+------+--------------
- 1 | -16 | -3 | 1 | -1
- 2 | -15 | -9 | 1 | 1
- 3 | -14 | -10 | 1 | 1
- 4 | -14 | 12 | 1 | -1
- 5 | -10 | -7 | 1 | 1
- 6 | -10 | -4 | 1 | 1
- 7 | -10 | 8 | 1 | 1
- 8 | -9 | -8 | 1 | 1
- 9 | -9 | 11 | 1 | -1
- 10 | -8 | -7 | 1 | 1
- 11 | -8 | -4 | 1 | 1
- 12 | -7 | -6 | 1 | 1
- 13 | -4 | -1 | 1 | 1
- 14 | -3 | -2 | 1 | -1
- 15 | -3 | 5 | 1 | -1
- 16 | -2 | -1 | 1 | -1
- 17 | -2 | 4 | 1 | -1
- 18 | 5 | -8 | 1 | -1
- 19 | 5 | 9 | 1 | -1
- 20 | 5 | 11 | 1 | -1
- 21 | 7 | -4 | 1 | 1
- 22 | 8 | 11 | 1 | -1
- 23 | 10 | 12 | 1 | -1
- 24 | 11 | 13 | 1 | -1
- 25 | 12 | 13 | 1 | -1
- 26 | 13 | -15 | 1 | -1
- 27 | 16 | -9 | 1 | 1
- 28 | 16 | 15 | 1 | 1
-(28 rows)
- 1 | -3 | 2 | 1 | -1
- 2 | 1 | 3 | 1 | -1
- 3 | 2 | 1 | 1 | 1
-(3 rows)
-
--- q4
-ROLLBACK;
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