Use STATService: 1. Import Data 2. Select tests & post-hoc 3. Get results 4. Provide feedback
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Structure and Types of Data

Data to be used in StatService is structured as a matrix, where columnss represent variables (the different algorithms, techniques or treatmets you want to compare), and rows represent cases specific situations or applications of the techniques. Each cell in this matrix represent the specific value used for comparison (e.g. execution time, quality of results, accuracy, etc.) for the variable and case in with it is located.

In STATServices, a numeral type of variables is assumed, i.e. by default data specified in cells is interpreted as floating point numbers.

Formatting Options

In STATServices, you provide the data for analyses either as plain text or as a binary file, using formats such as Excel 2003/2007/2010. When using plain text input, thel formatting of the data can be parametrized by:

  • Specifying the concrete separator token between cell items.
  • Specifying the concrete separator token between rows.
  • Specifying if you are going to use variable and a case names as the firts row and column of data.
Thus the general format of input in statservice is:
Variable 1Cell Sep.Variable 2Cell Sep....Cell Sep.Variable N Row Sep.
Case AData A-1Cell Sep.Data A-2Cell Sep....Cell Sep.Data A-N Row Sep.
Case BData B-1Cell Sep.Data B-2Cell Sep....Cell Sep.Data B-N Row Sep.
......Cell Sep....Cell Sep....Cell Sep.... Row Sep.
Case XData X-1Cell Sep.Data X-2Cell Sep....Cell Sep.Data X-N Row Sep.

Input Data creation examples

The image below shows a case in which we have 3 different sorting algorithms under, similar characteristics that will be under 3 differents scenarios. Algorithms are: Shell Sort, QuickSort and Distribution Counting.

  • Direct Input

  • CSV example

  • Excel example

The next image represents the result that might be shown on the web page for these last cases:

Result of the import