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mpl-000
line_plots
Plot y against x on a new Axes. Return a single row containing the line's ydata as floats.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[0.0, 1.0, 4.0, 9.0, 16.0, 25.0, 36.0, 49.0]]}
mpl-001
line_plots
Plot y against x, then y2 against x, on the same Axes. Return a single row [number of lines on the axes].
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[2]]}
mpl-002
line_plots
Plot y against x with label='squares' and y2 against x with label='down', then call ax.legend(). Return a single row with the two legend texts in order.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [["squares", "down"]]}
mpl-003
line_plots
Plot y against x. Return a single row containing the line's xdata as floats.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0]]}
mpl-004
line_plots
Plot y against x with linestyle='--' and marker='o'. Return a single row [linestyle, marker] as strings.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [["--", "o"]]}
mpl-005
line_plots
Plot the CUMULATIVE SUM of y against x. Return a single row with the plotted ydata as floats.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[0.0, 1.0, 5.0, 14.0, 30.0, 55.0, 91.0, 140.0]]}
mpl-006
bar_charts
Draw a bar chart of values against labels. Return a single row with the bar heights as floats, in order.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[3.0, 7.5, 5.25, 2.0]]}
mpl-007
bar_charts
Draw a bar chart of values against labels with width=0.5. Return a single row with the bar widths as floats.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[0.5, 0.5, 0.5, 0.5]]}
mpl-008
bar_charts
Draw a HORIZONTAL bar chart (barh) of values against labels. Return a single row with the bar widths as floats, in order.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[3.0, 7.5, 5.25, 2.0]]}
mpl-009
bar_charts
Draw a stacked bar chart: first values, then values again on top using bottom=values. Return a single row [number of patches, height of the first patch as a float, bottom (y) of the LAST patch as a float].
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[8, 3.0, 2.0]]}
mpl-010
bar_charts
Draw a bar chart of values against labels, then set the tick labels explicitly to labels. Return a single row with the x tick label texts.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [["alpha", "beta", "gamma", "delta"]]}
mpl-011
statistical
Draw a histogram of samples with bins=4. Return a single row with the bin counts as floats.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[3.0, 4.0, 2.0, 1.0]]}
mpl-012
statistical
Draw a histogram of samples with bins=4. Return a single row with the bin EDGES as floats.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[1.0, 3.0, 5.0, 7.0, 9.0]]}
mpl-013
statistical
Draw a scatter of y against x. Return a single row with the flattened offsets as floats, i.e. [x0, y0, x1, y1, ...].
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[0.0, 0.0, 1.0, 1.0, 2.0, 4.0, 3.0, 9.0, 4.0, 16.0, 5.0, 25.0, 6.0, 36.0, 7.0, 49.0]]}
mpl-014
statistical
Draw a boxplot of samples. Return a single row [median, lower whisker value, upper whisker value] as floats, read from the returned dict.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[3.0, 1.0, 5.0]]}
mpl-015
statistical
Draw a histogram of samples with bins=[0, 3, 6, 10]. Return a single row with the bin counts as floats.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[3.0, 6.0, 1.0]]}
mpl-016
axes_config
Plot y against x, then set the x limits to (0, 10) and the y limits to (-5, 60). Return a single row [xmin, xmax, ymin, ymax] as floats.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[0.0, 10.0, -5.0, 60.0]]}
mpl-017
axes_config
Plot y against x and set the title to 'Squares', the x label to 'n' and the y label to 'n^2'. Return a single row [title, xlabel, ylabel].
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [["Squares", "n", "n^2"]]}
mpl-018
axes_config
Plot y against x and set the y ticks explicitly to [0, 10, 20, 30, 40, 50]. Return a single row with the y tick positions as floats.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[0.0, 10.0, 20.0, 30.0, 40.0, 50.0]]}
mpl-019
axes_config
Create a figure with 2 rows and 3 columns of subplots. Return a single row [number of axes on the figure, number of rows, number of columns] as ints, reading rows and columns from the first axes' subplotspec.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[6, 2, 3]]}
mpl-020
axes_config
Plot y against x on a log-scaled y axis (set_yscale('log')). Return a single row [the y axis scale name].
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [["log"]]}
mpl-021
axes_config
Plot y against x, then set the x limits to (2, 6). Return a single row with the ydata of the line — note the limits do NOT filter the data.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[0.0, 1.0, 4.0, 9.0, 16.0, 25.0, 36.0, 49.0]]}
mpl-022
seaborn
Use seaborn.lineplot to plot y against x on a new Axes. Return a single row with the resulting line's ydata as floats.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[0.0, 1.0, 4.0, 9.0, 16.0, 25.0, 36.0, 49.0]]}
mpl-023
seaborn
Use seaborn.barplot with x=groups, y=gvals, errorbar=None. Return a single row with the bar heights as floats — these are the per-group MEANS seaborn computed.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[3.0, 5.0]]}
mpl-024
seaborn
Use seaborn.scatterplot with x=x, y=y. Return a single row [number of collections on the axes].
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[1]]}
mpl-025
seaborn
Use seaborn.barplot with x=groups, y=gvals, estimator='sum', errorbar=None. Return a single row with the bar heights as floats.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[9.0, 15.0]]}
mpl-026
seaborn
Use seaborn.histplot on samples with bins=4. Return a single row with the patch heights as floats.
Preloaded data (plain Python lists / numpy arrays): x = [0, 1, 2, 3, 4, 5, 6, 7] y = [0, 1, 4, 9, 16, 25, 36, 49] (x squared) y2 = [7, 6, 5, 4, 3, 2, 1, 0] (descending) labels = ["alpha", "beta", "gamma", "delta"] values = [3.0, 7.5, 5.25, 2.0] samples = [1, 1, 2...
{"x": [0, 1, 2, 3, 4, 5, 6, 7], "y": [0, 1, 4, 9, 16, 25, 36, 49], "y2": [7, 6, 5, 4, 3, 2, 1, 0], "labels": ["alpha", "beta", "gamma", "delta"], "values": [3.0, 7.5, 5.25, 2.0], "samples": [1, 1, 2, 3, 3, 3, 4, 5, 5, 9], "groups": ["a", "b", "a", "b", "a", "b"], "gvals": [1.0, 3.0, 3.0, 5.0, 5.0, 7.0]}
{"rows": [[3.0, 4.0, 2.0, 1.0]]}

matplotlib-tasks-v1

Task dataset for a Matplotlib/Seaborn RL / eval environment, in the shape used by the Prime Intellect Environments Hub.

27 plotting tasks over a fixed set of small datasets. The model builds the figure, then reads the answer back off the axes; the grade is an exact row comparison against a reference. Deterministic — no LLM judge, no external API, no network, and no pixels.

Category Tasks Covers
line_plots 6 ydata/xdata readback, multiple lines, legend texts, linestyle and marker, plotting a derived series
axes_config 6 explicit limits, title and axis labels, explicit ticks, subplot grids, log scale, limits not filtering data
bar_charts 5 heights, widths, barh, stacked bars via bottom, explicit tick labels
statistical 5 histogram counts and edges, custom bin edges, scatter offsets, boxplot median and whiskers
seaborn 5 lineplot passthrough, barplot group means, barplot with estimator="sum", scatterplot collections, histplot patch heights

⚠ Why this dataset does not compare images

Image comparison is the obvious way to grade a plot and the wrong one: it fails on font hinting, DPI, backend and antialiasing long before it tests whether the model plotted the right thing. Here the model builds the figure and the grade reads values back off the artists.

That still leaves a determinism trap, and it was measured on matplotlib 3.11.1, not assumed:

ln.get_color()  ->  (0.1215…, 0.4666…, 0.7058…)   from the STYLE CYCLE — version-dependent
ax.get_xlim()   ->  (-0.2, 4.2) after autoscale   depends on margin defaults
ln.get_ydata()  ->  exactly what was passed in    stable
hist counts     ->  computed from the data        stable
ax.get_xlim()   ->  after ax.set_xlim(0, 10)      stable — the task set it

Every task therefore grades only: user-supplied data, computed values, and properties the task itself sets explicitly. Never a default colour, never an autoscaled limit, never an automatic tick location.

Fields

Field Description
task_id stable id, e.g. mpl-017
category one of the five above
prompt the natural-language instruction
data_description the preloaded variables, as shown to the model
data those variables as JSON, so the task is self-contained
expected_output {"rows": [[...]]} — the reference result

Verification

Every task is independently checked: it runs, is deterministic across two freshly built figures, returns a non-empty list of JSON-safe primitives — which catches an Artist or numpy scalar leaking out instead of a plain value — contains no NaN/inf, and survives the serialisation round-trip exactly. All 27 pass on matplotlib 3.11.1 / seaborn 0.13.2 with the Agg backend.

Builder and verifier: build_tasks.py.

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