Multiple List Comparator

Introduction

Multiple List Comparator is an online application for comparison of two or more lists to find shared items. The comparison results are presented both grafically and as item listings.

Settings and List Input

Before any analysis, the required number of empty list forms has to be prepared. This can be done by filling the number of lists to be prepared in the related input field and clicking the Set button (all existing lists will be discarded). To add a list form to the existing set of forms, click the large plus button located just after the last list form. The program expects an input in the form of simple item lists i.e. with one item per line. If the source data are to be loaded from files, the files should be plain text files (no formatting) containing one item per each line.

To trigger the analysis, click the Compare button. To erase all fields, click the Clear All button.

Understanding the Results

The graphical output of the analysis comes in the form of a Venn diagram in case of two or three lists. For larger counts of lists, the app will output a table of all pairwise intersections overlayed with a heatmap highlighting the sizes of intersections by decreasing saturation of yellow color. In both cases, the numbers indicating the overlaps are clickable and the corresponding lists of items will be displayed in the table just below the graphics.

The other part of the results is a tabular listing of all items shared by at least two lists. The shared items are ordered by number of lists sharing the item so the intersection of all lists (if there is any) is listed at the top of the table.