Filter function: the QS Rankings example

How to use the filter function in BStreams? Before starting, we are talking about an advanced feature that allows users to draw attention only to specific data on the chart (we have dedicated an entire article on setting a filter panel on BStreams).

The filter function can be activated to filter elements in the chart or the ones within the original dataset. Filtering elements in the original dataset gives vast analysis opportunities allowing the user to select fields not included in the visualization.

In this article, we took advantage of the release of the QS World University ranking to have a concrete example of practicing with an interactive graph on which to apply the various filters.

What is the QS World University Rankings

It has been just published the last edition of the global rank QS World University Rankings in 2022. The report has selected the best 1,300 universities worldwide, making QS the most significant ranking so far – located in 93 different countries. Each academic institution has been assessed according to six metrics:

  1. Academic Reputation
  2. Employer Reputation
  3. Faculty/Student Ratio
  4. Citations per faculty
  5. International Faculty Ratio
  6. International Student Ratio

Academic reputation: this is definitely the metric with the highest weight when valuing universities, reaching 40%. The study collects the opinions of more than 130,000 experts in the higher education field regarding teaching and research quality in the world’s universities.

Employer Reputation: this metric is based on asking work employers to identify institutions from which the most talented, competent, and innovative graduates

Faculty/Student Ratio: students see teaching quality as the most important metric when comparing institutions. In essence, this parameter evaluates how institutions can provide their students significant access to lecturers and tutors and recognize that a high number of faculty members per student will reduce the teaching burden on each academic.

Citations per faculty: This metric measures the quality of institutional research. To calculate it, it detects the total number of citations received from all the documents produced by an institution in five years compared to the number of faculty members of that institution. This year, the QS has evaluated 96 million citations from 14.7 million documents.

International Faculty Ratio: the study starts from the assumption that a highly international institution acquires a consistent number of advantages. It demonstrates the capacity of attracting professors and students from all over the world, which in turn suggests that the university possesses a solid international connotation.

International Student Ratio: an institution with a vast number of international students ensures a multinational and multicultural environment, in addition to a global awareness: soft skills, increasingly valuable for employers.

How to apply the filter function at the 2022 QS World Rankings

Firstly, we have applied the filter function to the entire dataset, in order to have all the fields available to be filtered.

According to the ranking, the US Massachusetts Institute of Technology (MIT) classifies as the best university in the world for the 10th year in a row – a superb achievement – immediately followed by Oxford University (UK) and the US Stanford University. We have highlighted in green the top three universities with the highest overall score in the rank.


To end up, the filter function allows us to optimize the research work by allowing the user to filter on the textual fields country and university, and on the numeric value overall score.

If you haven’t tried the filter function yet, try it now on BStreams. You will boost your productivity and the engagement of your audience by focusing only on specific elements.

Still any questions? Feel free to write us at

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