Examine Missing Values

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Predictive and Specialized Modeling • Modeling Utilities • Explore Missing Values Utility • Examine Missing Values

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Select Help > Sample Data Library and open Arrhythmia.jmp.

Select Analyze > Screening > Explore Missing Values.

Select all columns (280 in all) and click Y, Columns.

Click OK. Select the Show only columns with missing checkbox.

Missing Value Report

The Missing Columns report shown in Missing Value Report indicates that only five columns have missing data. Out of a total of 452 rows, Column J has 376 missing values. Because it is largely missing, it is not useful for data analysis, even with imputed values. However, it might be useful to model Column J using the Informative Missing option in a platform that supports this option to see if values are perhaps not missing at random.

Note that the two Imputation options, Multivariate Imputation and Multivariate SVD Imputation, are not shown. A message indicates that imputation is disabled because some columns included in the analysis were categorical. The data table contains several columns that are numeric, but have a nominal modeling type. These cannot be used for imputation.

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Help created on 9/19/2017