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12 | An area chart is used to show quantitative data. It is based on line chart, in the way that area between axis and the line |
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12 | An area chart is used to show quantitative data. It is based on line chart, in the way that area between axis and the line | |
13 | is emphasized with color. Since the area chart is based on line chart, QAreaSeries constructor needs QLineSeries instance, |
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13 | is emphasized with color. Since the area chart is based on line chart, QAreaSeries constructor needs QLineSeries instance, | |
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which defines "upper" boundary of the area. "Lower" boundary is defined by default by axis X |
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14 | which defines "upper" boundary of the area. "Lower" boundary is defined by default by axis X. Instead of axis X "lower" boundary can be specified by other line. | |
15 | In that case QAreaSeries should be initiated with two QLineSerie instances. Please note terms "upper" and "lower" boundary can be misleading in cases |
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15 | In that case QAreaSeries should be initiated with two QLineSerie instances. Please note terms "upper" and "lower" boundary can be misleading in cases | |
16 | where "lower" boundary had bigger values than the "upper" one, however the main point that area between these two boundary will be filled. |
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16 | where "lower" boundary had bigger values than the "upper" one, however the main point that area between these two boundary lines will be filled. | |
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18 | \image areachart.png |
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18 | \image areachart.png | |
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