Plotting Data with Scatter Charts

The Scatter chart displays various dots, which help in identifying grouping / clustering of values, correlation between values, and other visual patterns present in the plotted data against certain values of another measurement / property data. These dots represent the absolute values obtained for a field against each value of another field.

The X-axis contains values of the selected property type. The Y-axis shows the range of measurement values obtained. The red-dashed lines that indicate the limits (if defined) are displayed on the horizontal scale in this case.

In the KS6800A PathWave Measurement Analytics software, Scatter charts are plotted by default whenever you add a field as X axis to a selected chart for all chart types. See Adding Field as X Axis for Selected Chart for more information on how to add an X axis to a selected chart.

Let us compare charts for various fields and see how data is displayed and interpreted using Scatter charts after a field is added as X axis to one or more selected charts.

  1. Plot the charts you wish to plot as Scatter chart.
In this example, the fields petal_width, petal_length and species have been plotted. The field petal_width is plotted as the default Histogram chart, species has been plotted as the default Pareto chart and petal_length has been converted to Box and Whisker chart. The field keysight_row, which includes the sample numbers, shall be added as X axis to each of the charts.

  1. Select a chart and with the field keysight_row highlighted, click Add field as X axis for selected chart from the Actions area.
  2. Repeat the previous step for the other charts.
Scatter charts are plotted for each corresponding chart to which the field keysight_row is added as X axis.

  1. To view the measurements in the scatter, click to select a chart.
  2. Hover the cursor over each dot in the scatter to view the relationship between the two fields, that is, the plotting of absolute values from the field on Y axis versus the values from the field on the X axis. The values depicted by each dot are displayed in the format: (<Value from X axis>, <Value from Y axis> .
In the first chart from the left, the mouse pointer hovers over the scatter dot where the corresponding data, which is displayed in the callout as (98, 1.1), can be interpreted as For the 98th sample in keysight_row, the petal_length is measured as 1.1 units. Using keysight_row as X axis in other charts helps us accurately identify the value for species and the petal_width units for the same sample.

  1. Click to remove X axis and view the default charts for each field.
  2. Click to close the window for the displayed charts.