Added the Three Variable option to the 2/3 Variable Graph

[derekagorhom]

Fixes partly #7260
This is ready for review
I have done A-F, currently working on G-I
For the name changes, they need to be done on the database before the title of the dialogue and the by option can be changed.

[derekagorhom]

I have done items G- I
for the item where we implement the facet when the multi selector is single, apparently for the dialogue to produce results for the first value it must remain in the multi selector, so what i did was add a condition that if the values in the multi selector is more that one, the facet option will be disabled. i will have a meeting with antoine during tomorrows general meeting to see a way around this problem.
@rdstern this is ready for review

[rdstern]

@derekagorhom that's an excellent start. Two minor points:
a) In the labelling it says the first variable is categoric, while the others are categorical. We should be consistent. Let's have them all categoric (partenr to numeric). That's for both 2 way and 3 way.
b) You have followed my suggestion to have the facet control only available if there is just one variable in the multiple receiver. Could you change that please. There can be two facet variables, so if there are multiple variable in the recieve, then this is the first facet, and the facet variable becomes the second. (It would then ignore thewrap/rpw/column setting)
c) Could you check what happens in the 3-variable case. I think there are problems there?
And @jkmusyoka could you please do a take over of the testing and further suggestions for this dialog? It is an important one that is also in the Climatic > Describe menu.

It is the partner to the Summarise dialog (that's also in the climatic as well as the describe menus) Once @fran2or is able to test dialogs, he may take this over and you could then take on the testing of summarise, which is being improved by Vitalis.

They are important dialogs and in the (now) short list that need to be working in our improved R-Instat. And they need to be consistent with each other - eventually!

[rdstern]

@jkmusyoka you have been quiet on whether you agree on this. I hope these messages are getting through?

[derekagorhom]

@rdstern , @fran2or , Below are the combinations for the 3 variable graphs.
can i know which graphs should be available for which combinations.
Thanks
Categorical by Categorical by Categorical
Categorical by Categorical by Numeric
Categorical by Numeric by Categorical
Categorical by Numeric by Numeric
Numeric by Categorical by Categorical
Numeric by Numeric by Categorical
Numeric by Categorical by Numeric
Numeric by Numeric by Numeric

[fran2or]

@derekagorhom Below are my initial thoughts on your query and hence there should be discussion before they are included in the code. What are your thoughts @rdstern, @jkmusyoka, @lilyclements and anyone else that can contribute?

1. Categorical by Categorical by Categorical:

   • Possible Graphs (https://edav.info/multidimensional-categorical-variables.html)
     • Stacked Bar Chart
     • Clustered Bar Chart
     • Mosaic Plot

2. Categorical by Categorical by Numeric:

   • Possible Graphs (https://ademos.people.uic.edu/Chapter11.html)
     • Grouped Box Plot (https://seaborn.pydata.org/generated/seaborn.boxplot.html)
     • Violin Plot (https://seaborn.pydata.org/generated/seaborn.violinplot.html)
     • Grouped Bar Chart
       (https://matplotlib.org/stable/gallery/lines_bars_and_markers/bar_stacked.html)

3. Categorical by Numeric by Categorical:
   -- Possible Graphs (https://ademos.people.uic.edu/Chapter11.html)

   • Grouped Box Plot (https://seaborn.pydata.org/generated/seaborn.boxplot.html)
   • Violin Plot (https://seaborn.pydata.org/generated/seaborn.violinplot.html)
   • Grouped Bar Chart
     (https://matplotlib.org/stable/gallery/lines_bars_and_markers/bar_stacked.html)

4. Categorical by Numeric by Numeric:

   • Possible Graphs: Scatter Plot, Line Plot, Heatmap
   • Sample Graph Links:
     • Scatter Plot:
     • Line Plot
     • Heatmap: (https://matplotlib.org/stable/gallery/images_contours_and_fields/image_annotated_heatmap.html)

5. Numeric by Categorical by Categorical:

   • Possible Graphs (https://ademos.people.uic.edu/Chapter11.html)
     • Grouped Box Plot (https://seaborn.pydata.org/generated/seaborn.boxplot.html)
     • Violin Plot (https://seaborn.pydata.org/generated/seaborn.violinplot.html)
     • Grouped Bar Chart
       (https://matplotlib.org/stable/gallery/lines_bars_and_markers/bar_stacked.html)
       l)

6. Numeric by Numeric by Categorical:

• Possible Graphs: Scatter Plot, Line Plot, Heatmap
• Sample Graph Links:
  • Scatter Plot:
  • Line Plot
  • Heatmap: (https://matplotlib.org/stable/gallery/images_contours_and_fields/image_annotated_heatmap.html)

7. Numeric by Categorical by Numeric:
   -- Possible Graphs: Scatter Plot, Line Plot, Heatmap

   • Sample Graph Links:
     • Scatter Plot:
     • Line Plot
     • Heatmap: (https://matplotlib.org/stable/gallery/images_contours_and_fields/image_annotated_heatmap.html)

8. Numeric by Numeric by Numeric:

   • Possible Graphs: 3D Scatter Plot, Line Plot, Heatmap
   • Sample Graph Links:
     • 3D Scatter Plot (https://matplotlib.org/stable/gallery/mplot3d/scatter3d.html)
     • Line Plot
     • Heatmap: (https://matplotlib.org/stable/gallery/images_contours_and_fields/image_annotated_heatmap.html)