Creation of sample problems that use the StatisticalPlots macro. by pstaabp · Pull Request #1449 · openwebwork/pg

pstaabp · 2026-06-25T12:26:06Z

This adds some sample problems that use the StatisticalPlots.pl macro.

drgrice1

This needs some changes.

Make sure to use perltidy-pg on the added problems. All of them are showing changes when that is done.

drgrice1 · 2026-07-08T00:28:05Z

 #:% section = preamble
-#: Make sure that PODLINK('plots.pl') is loaded.
+#: This produces a scatter plot with PODLINK('plots.pl').  A version of this 
+#: with the PODLINK('StatisticalPlots.pl') is available in 


This should be

Suggested change

#: with the PODLINK('StatisticalPlots.pl') is available in

#: with PODLINK('StatisticalPlots.pl') is available in

drgrice1 · 2026-07-08T00:37:52Z

+#: Use `xtick_labels` to customize the tick labels and the resulting hashref
+#: is a mapping from the old tick labels to the new labels.


This should be

Suggested change

#: Use `xtick_labels` to customize the tick labels and the resulting hashref

#: is a mapping from the old tick labels to the new labels.

#: Use `xtick_labels` to customize the tick labels. The hash reference value

#: is a mapping from tick positions to new labels.

Please do not use hashref or arrayref anymore in documentation. They are not words.

This is not a "resulting" hash reference, it is the value set for the xtick_labels option. It does not "result" from anything. It is given.

The mapping is not from the old tick labels, but from the tick positions.

drgrice1 · 2026-07-08T00:40:55Z

+#: The bars are added with the `add_barplot` method with the xdata and ydata.
+#: The `bar_width` give a relative width of the bar.  If this option is 1 
+#: there is no gap between bars.  
+#: See PODLINK('StatisticalPlots.pl') for other options to this method.
+#:


This should be

Suggested change

#: The bars are added with the `add_barplot` method with the xdata and ydata.

#: The `bar_width` give a relative width of the bar. If this option is 1

#: there is no gap between bars.

#: See PODLINK('StatisticalPlots.pl') for other options to this method.

#:

#: The bars are added with the `add_barplot` method passing the x and y data

#: values. The `bar_width` gives the relative width of the bar. If this option

#: is 1, then there is no gap between bars. See PODLINK('StatisticalPlots.pl')

#: for other options to this method.

#:

drgrice1 · 2026-07-08T01:37:09Z

+$num_students = 0;
+$num_students += $_ for @grades;
+
+$perA = Real($grades[0] / $num_students);


This should be

Suggested change

$perA = Real($grades[0] / $num_students);

$perA = Compute($grades[0] / $num_students);

Your question asks for a percent. If you use the Percent context, but call Real it does not create a percent. It creates a real. Using Compute in the Percent context creates a percent in the way that you describe in the documentation below.

drgrice1 · 2026-07-08T01:43:46Z

+#: the number of minor ticks between each tick.
+#:
+#: The box plot is created with the `add_boxplot` method in which the data is the
+#: first argument (it is an array ref, which is why the `~~` is needed).  The


Please spell out "reference".

drgrice1 · 2026-07-08T02:20:31Z

+    aria_label  => 'Linear Regression'
+);
+$plot->add_scatterplot(
+    @data,


This should be

Suggested change

@data,

~~@data,

drgrice1 · 2026-07-08T02:22:30Z

+#: function of PODLINK('PGstatisticsmacros.pl').  Note: the x and y data
+#: needs to be array references and the 2nd and 3rd lines extract the
+#: components.


This should be

Suggested change

#: function of PODLINK('PGstatisticsmacros.pl'). Note: the x and y data

#: needs to be array references and the 2nd and 3rd lines extract the

#: components.

#: function of PODLINK('PGstatisticsmacros.pl'). Note that the x and y data values

#: need to be in array references, and the 2nd and 3rd lines extract the

#: components.

drgrice1 · 2026-07-08T02:25:18Z

+#: For the plot, first set up the `Plot` with a plotting window that will
+#: capture the data. The `add_dataset` method adds the data to the plot
+#: with circles and color blue.


Please change this to something like

Suggested change

#: For the plot, first set up the `Plot` with a plotting window that will

#: capture the data. The `add_dataset` method adds the data to the plot

#: with circles and color blue.

#: Set up the `StatPlot` with a plotting window that will

#: contain the data. The `add_dataset` method adds the data to the plot

#: with circle marks that are colored blue.

drgrice1 · 2026-07-08T02:30:34Z

+#: The data is formatted by putting the array data in a nice format using both
+#: join (which joins an array separated by ', ') and map (which creates a new
+#: array that formats as (x1, y1)).  The [@ @] is used to run perl.
+#:
+#: The `[! !]{}{}` is a PGML format for inserting an image.


Please rework this section. It reads rather poorly. For example, the first sentence says "the data is formatted ... in a nice format". That is really bad. Also, make sure that all of the things such as ', ', (x1, y1), and [@ @] are properly set out using markdown.

I realize you copied this from the ScatterPlot.pg problem. That problem should also be fixed.

drgrice1 · 2026-07-08T02:32:05Z

+## DBsection(PGML tutorial 2015)
+## Date(06/01/2026)
+## Institution(Boise State University)
+## Author(Jaimos Skriletz)


Is "Jaimos Skriletz" really the author of this problem? I think @somiaj would make sure the problem actually worked before submitting it in a pull request.

Creation of sample problems using StatisticalPlots macro.

f398a36

Alex-Jordan reviewed Jun 25, 2026

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Comment thread tutorial/sample-problems/Statistics/boxplot.pg Outdated

fix typo

83cbb83

drgrice1 reviewed Jul 8, 2026

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Creation of sample problems that use the StatisticalPlots macro.#1449

Creation of sample problems that use the StatisticalPlots macro.#1449
pstaabp wants to merge 2 commits into
openwebwork:PG-2.21from
pstaabp:add-stat-plot-sample-problems

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	#: with the PODLINK('StatisticalPlots.pl') is available in
	#: with PODLINK('StatisticalPlots.pl') is available in

		#: Use `xtick_labels` to customize the tick labels and the resulting hashref
		#: is a mapping from the old tick labels to the new labels.

	$perA = Real($grades[0] / $num_students);
	$perA = Compute($grades[0] / $num_students);

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pstaabp commented Jun 25, 2026

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