each entity with its triplet (v1, v2, v3) of associated data is plotted as a disk that expresses two of the vi values through the disk’s xy location and the third through its size. bubble charts can be considered a variation of the scatter plot, in which the data points are replaced with bubbles. as the documentation for microsoft office explains, “you can use a bubble chart instead of a scatter chart if your data has three data series that each contain a set of values. the human visual system most naturally experiences a disk’s size in terms of its diameter, rather than area. scaling the size of bubbles based on area can be misleading [ibid]. this scaling issue can lead to extreme misinterpretations, especially where the range of the data has a large spread.
[3] judgments based on bubble sizes can be problematic regardless of whether area or diameter is used. it is important to remember that the range of bubble sizes used is often arbitrary. the metaphoric representation of data values as disk areas cannot be extended for displaying values that are negative or zero. as an example, a negative value v < 0 {\displaystyle v<0} can be represented by a disk of area v {\displaystyle v} in which is centered some chosen symbol like "×" to indicate that the size of the bubble represents the absolute value of a negative data value. and this approach can be reasonably effective in situations where data values' magnitudes (absolute values) are themselves somewhat important—in other words, where values of v {\displaystyle v} and − v {\displaystyle -v} are similar in some context-specific way—so that their being represented by congruent disks makes sense. additional information about the entities beyond their three primary values can often be incorporated by rendering their disks in colors and patterns that are chosen in a systematic way.
bubble chart format
a bubble chart sample is a type of document that creates a copy of itself when you open it. The doc or excel template has all of the design and format of the bubble chart sample, such as logos and tables, but you can modify content without altering the original style. When designing bubble chart form, you may add related information such as bubble chart maker,bubble chart excel,bubble chart example,bubble chart template,bubble chart online
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bubble chart guide
in addition to the x values and y values that are plotted in a scatter chart, a bubble chart plots x values, y values, and z (size) values. to create a bubble chart, arrange your data in rows or columns on a worksheet so that x values are listed in the first row or column and corresponding y values and bubble size (z) values are listed in adjacent rows or columns. the following procedure will help you create a bubble chart with similar results. copy the example worksheet data into a blank worksheet, or open the worksheet that contains the data that you want to plot in a bubble chart.
to apply a special formatting effect to the plot area, chart area, chart title, or vertical axis of the chart, click that chart element, or select it from a list of chart elements (format tab, current selection group, chart elements box), and then do the following: click the theme that you want to use. copy the example worksheet data into a blank worksheet, or open the worksheet that contains the data that you want to plot in a bubble chart. when you create a bubble chart from three or fewer rows or columns of data, the chart does not plot the bubbles correctly. when you use a chart template to create a chart in another workbook, the new chart uses the colors of the chart template — not the colors of the document theme that is currently applied to the workbook.
a bubble chart is used to display three dimensions of data at the same time. the location of the bubble is determined by the first two dimensions and the corresponding horizontal and vertical axes. the third dimension is represented by the size of the individual bubbles. the bubble chart allows a number of properties to be specified for each dataset. these are used to set display properties for a specific dataset. for example, the colour of the bubbles is generally set this way. we can also change the default values for the bubble chart type. doing so will give all bubble charts created after this point the new defaults. the default configuration for the bubble chart can be accessed at chart.overrides.bubble. bubble chart datasets need to contain a data array of points, each point represented by an object containing the following properties: important: the radius property, r is not scaled by the chart, it is the raw radius in pixels of the bubble that is drawn on the canvas.
of all the charts used to represent data, bubble charts are interesting because of their appearance. in the below example, you can see the value of sales in electronics and the value of sales in furniture; the circles represent the number of items purchased. for example, the cost of valuation can be studied against risk by using the standard axes to represent cost and value and the bubble sizes to represent risk. the size of the bubble is used to represent the gravity of a parameter.
every bubble chart can have these features, characteristic of selected data sets. therefore, the rise in positive cases per million cannot be plotted without using a bubble to represent the rise in the number of tests being conducted. do note that this is a rare case, and most bubble charts only use bubbles to represent positive values; for example, the population of a country can never be negative. when used with full knowledge of its limitations, a bubble chart can be a valuable tool to represent data without overwhelming the reader. this simple-looking chart plots in a similar way to scatter plots, but instead of using a bubble size, they use a “stalk” length as a volume indicator of volume.
a bubble chart is a data visualization that displays multiple circles (bubbles) in a two-dimensional plot. most commonly, a bubble chart displays the values of three numeric variables, where each observation’s data is shown by a circle (“bubble”), while the horizontal and vertical positions of the bubble show the values of two other variables. a bubble chart requires at least three variables (columns) of data: one showing the size of the bubbles and two others showing the horizontal and vertical position of the points. this is typically only practical when there is a relatively small number of data points.
in the example immediately below, dark grey indicates high levels of concerns regarding food when traveling to the different countries, light blue indicates an absence of a concern, and in-between colors represent differences in degree (e.g., food concerns are marginally higher in great britain than in australia, and marginally lower in mexico than in egypt). from a conceptual perspective, this is identical to the previous examples, with the horizontal and vertical positions being latitudes and longitudes. bubble clouds, also known as circle packing, are another type of bubble chart. in the second example, shown further below, the the bubbles have been ordered from biggest to smallest, and color has also been used to redundantly encode the data.