doubles sometimes treated as categories when importing from GraphML

[brucemcpherson]

• gephi v1.02
• macos
• chrome v142

I have a graphml file, which has a section describing the keys = for example

  <key id="V-depression_post" for="node" attr.name="depression_post" attr.type="double"/>
  <key id="V-depression_pre" for="node" attr.name="depression_pre" attr.type="double"/>

and example values

      <data key="V-depression_post">12</data>
      <data key="V-depression_pre">12</data>

      <data key="V-depression_post">0</data>
      <data key="V-depression_pre">27</data>

When imported they are treated sometimes as categories, and sometimes as numbers

At first I thought perhaps missing values would cause them to be treated as numbers rather than categories, but I have other examples where there are no missing values.

  <key id="V-out_degree_change" for="node" attr.name="out_degree_change" attr.type="double"/>
  <key id="V-out_degree_post" for="node" attr.name="out_degree_post" attr.type="double"/>
  <key id="V-out_degree_pre" for="node" attr.name="out_degree_pre" attr.type="double"/>

      <data key="V-out_degree_change">-2</data>
      <data key="V-out_degree_post">2</data>
      <data key="V-out_degree_pre">4</data>

How is it deciding what is a category and what is number ?

[sim51]

The code that guess if a property is a category or not is here : https://github.com/gephi/gephi-lite/blob/dev/packages/gephi-lite/src/core/graph/fieldModel.ts#L130-L143

We take the first 100 values, and then for number we check if we have only 0 or 1 value.
When I take a look at your screenshot, I see a lot of 0. So I think that the first 100 lines are only composed of 0 values, which leads to a type category.

If our heuristics don't give the good result for you, you can still change the type. On the column name, click on the menu (the three vertical dots) and click on Modify column. In the displayed modal you will be able to change the column's type