This tool is used to convert continuous data to discrete (a.k.a. discretization) using percentile based equal frequency. It is useful for graphical and statistical tools that require group category variables.
The percentiles are selected to produce the specified number of discrete levels. For example, with the default number of discrete levels = 4, SigmaXL uses the 25th percentile, 50th percentile and 75th percentile as bin intervals. The numerical values are converted as follows:
Minimum to < 25th percentile -> 1
25th percentile to < 50th percentile -> 2
50th percentile to < 75th percentile -> 3
75th percentile to Maximum -> 4
These percentiles will produce an approximate equal frequency if the
data are continuous. Ties will result in some unequal frequency
counts.
Click Sheet 1 tab of Customer
Data.xlsx.
Click SigmaXL > Data Manipulation > Convert to
Discrete. Ensure that the entire data table is
selected. If not, check Use Entire Data Table.
Click Next.
Select Responsive to Calls, Ease of Communications
and Staff Knowledge. Click Numeric Data
Variables (Y) >>.
Click OK. The results are given on the
Convert to Discrete sheet:
Define, Measure, Analyze, Improve, Control
Simulate, Optimize, Realize
Web Demos
Our CTO and Co-Founder, John Noguera, regularly hosts free Web Demos featuring SigmaXL and DiscoverSim Click here to view some now!
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