. do example.do

. * nwcommands tutorial 12: homophily, assortativity and mixing
. * Requires the core nwcommands.
. nwwebuse glasgow, nwclear

. nwsummarize glasgow1
--------------------------------------------------
   Network name:  glasgow1
   Network id:  1
   Directed: true
   Valued: false
   Two-mode: false
   Nodes: 50
   Selfloop: false
   Arcs: 113
   Minimum value:  0
   Maximum value:  1
   Density:  .0461
   Temporal: false

. summarize sport1 smoke1 alcohol1

    Variable |        Obs        Mean    Std. dev.       Min        Max
-------------+---------------------------------------------------------
      sport1 |         50        1.74    .4430875          1          2
      smoke1 |         50        1.38     .725343          1          3
    alcohol1 |         50        2.88    1.118308          1          5

. 
. * 1. Assortativity: correlate a number across ties
. nwassortativity glasgow1

  Network name: glasgow1
  Attribute: degree
----------------------------------------
    Ties: 74
    Assortativity coefficient: .172

. nwassortativity glasgow1, attribute(alcohol1)

  Network name: glasgow1
  Attribute: alcohol1
----------------------------------------
    Ties: 74
    Assortativity coefficient: .323

. nwassortativity glasgow1, attribute(sport1)

  Network name: glasgow1
  Attribute: sport1
----------------------------------------
    Ties: 74
    Assortativity coefficient: .069

. 
. * 2. Mixing tables for a categorical attribute
. nwmixing glasgow1, attribute(sport1) permutations(500)

   Network:  glasgow1      Directed: true
   Attribute:  sport1

 sport1_ego | sport1_alter
            | not regular     regular        Total
------------+-------------------------------------
not regular |          13          17           30
regular     |          21          62           83
------------+-------------------------------------
Total       |          34          79          113

   E-I Index: -.327   p-value: .351

. nwmixing glasgow1, attribute(smoke1) permutations(500)

   Network:  glasgow1      Directed: true
   Attribute:  smoke1

 smoke1_ego | smoke1_alter
            |         non occassional     regular        Total
------------+-------------------------------------------------
non         |          71           5          11           87
occassional |           5           2           4           11
regular     |           7           5           3           15
------------+-------------------------------------------------
Total       |          83          12          18          113

   E-I Index: -.345   p-value: .224

. nwmixing glasgow1, attribute(smoke1) permutations(1) row

   Network:  glasgow1      Directed: true
   Attribute:  smoke1

+----------------+
| Key            |
|----------------|
|   frequency    |
| row percentage |
+----------------+

            |           smoke1_alter
 smoke1_ego |       non  occassion    regular |     Total
------------+---------------------------------+----------
        non |        71          5         11 |        87 
            |     81.61       5.75      12.64 |    100.00 
------------+---------------------------------+----------
occassional |         5          2          4 |        11 
            |     45.45      18.18      36.36 |    100.00 
------------+---------------------------------+----------
    regular |         7          5          3 |        15 
            |     46.67      33.33      20.00 |    100.00 
------------+---------------------------------+----------
      Total |        83         12         18 |       113 
            |     73.45      10.62      15.93 |    100.00 
   E-I Index: -.345

. 
. * 3. Is the network the same later? Correlate two waves
. nwcorrelate glasgow1 glasgow2
----------------------------------------
  Network1 name: glasgow1
  Network2 name: glasgow2
----------------------------------------
    Correlation: .473

. 
. * 4. Plot
. nwplot glasgow1, color(smoke1) label(_nwnode) scheme(s1network) export("plot_glasgow_smoke.svg") r
> eplace
Calculating node coordinates...
Generating splines...
Plotting network...
Exporting graph to plot_glasgow_smoke.svg...
(file plot_glasgow_smoke.svg not found)
file plot_glasgow_smoke.svg saved as SVG format

.