# Bubble Plots

The data values from three series of equal length are plotted on the Cartesian (X-Y) plane, the value from the first series determining the position of the plotted symbol center along the X axis, the value from the second series determining the position of the plotted symbol center along the Y axis, and the value of the third series determining the radius of the circle plotted. Each triplet of series can be plotted with different symbols but the data values of any series can be shared.

Figure 10-6An example of a bubble plot

This screenshot shows a worksheet with a table of data with two series, each with three lists of numeric values. The screenshot also shows a bubble plot made from these two series.

Each series in a bubble plot can include four main components and four optional error components. The series may have a name, a single text value which will identify the series in the graph guru and in any legend attached to the chart. The series must have two lists of quantitative values, a list of X values and a list of Y values, which must have an equal number of elements. The series must also have a list, with the same number of elements, whose values will determine the size of the circles drawn at each point. The series may have lists of error components for the X values or the Y values and for positive or negative errors.

Table 10-3The data in each bubble series
Element Type Example
Name A single textual element labeling the data series. {"Series1"}
X A list of numeric values, which will place the values along the horizontal axis. {14.5, 2.8, 11.8, 5.7, 8.2}
Y A second list of numeric values, which will place the values along the vertical axis. {154, 29, 63, 90, 107}
Bubble A series of numeric values, which will determine the size of each circle drawn at the points. {45, 54, 34, 23, 37}
X Error (+) A list of numeric values with as many elements as there were in the 'X' list. These values can be in the same units as the numeric values in the 'X' list, can be proportions or can be proportions multiplied by one hundred. {0.10, 0.12, 0.09, 0.11, 0.09}
X Error (-) A list of numeric values with as many elements as there were in the 'X' list. These values can be in the same units as the numeric values in the 'Value' list, can be proportions or can be proportions multiplied by one hundred. {0.08, 0.11, 0.10, 0.09, 0.11}
Y Error (+) A list of numeric values with as many elements as there were in the 'Y' list, and therefore in the 'X' list. These values can be in the same units as the numeric values in the 'Y' list, can be proportions or can be proportions multiplied by one hundred. {0.09, 0.11, 0.10, 0.12, 0.09}
Y Error (-) A list of numeric values with as many elements as there were in the 'Y' list, and therefore in the 'X' list. These values can be in the same units as the numeric values in the 'Y' list, can be proportions or can be proportions multiplied by one hundred. {0.10, 0.09, 0.08, 0.11, 0.11}

Bubble plots have a single icon for the plot style.

The icon for bubble plots

The icon for a bubble plot.