The data have been organized in two different but related classification tasks.
column3Cweka.csv (file with three class labels)
The first task consists in classifying patients as belonging to one out of three categories: Normal (100 patients), Disk Hernia (60 patients) or Spondylolisthesis (150 patients).
column2Cweka.csv (file with two class labels)
For the second task, the categories Disk Hernia and Spondylolisthesis were merged into a single category labelled as 'abnormal'. Thus, the second task consists in classifying patients as belonging to one out of two categories: Normal (100 patients) or Abnormal (210 patients).
Each patient is represented in the data set by six biomechanical attributes derived from the shape and orientation of the pelvis and lumbar spine (each one is a column):
lumbar lordosis angle
grade of spondylolisthesis
Many thanks to GetOldTweets for providing an excellent scraper.
Use the following R code to directly access this dataset in R.