COM SCI 245
Big Data Analytics
Lecture and discussion.
Fall 2025: 4 lectures and 4 discussions. 2 lectures are open. The oldest of these readings was about 1 month ago.
Grades
3.68
Average grade awarded in COM SCI 245. Not a student rating: this is what the grades were.
In the A range
76%
of the 502 letter grades
D, F or W
0.8%
of every letter grade awarded, plus withdrawals
Taken pass/no pass
-
the registrar has this letter grade only this term
The registrar's own records: 502 grades over 6 terms, Fall 2021 to Fall 2025. Every instructor is pooled here.
What is inside that record
1 of those terms is a summer session, and summer sessions are counted here.
The table below splits them, and term averages across those 6 terms ran 3.60 to 3.83.
Historical grades for WANG, WEI, across recorded terms. The course summary above includes all professors.
- A+ 96 · 19.1%
- A 173 · 34.5%
- A- 113 · 22.5%
- B+ 66 · 13.1%
- B 29 · 5.8%
- B- 11 · 2.2%
- C+ 6 · 1.2%
- C- 4 · 0.8%
- F 4 · 0.8%
Percentages are of the 502 letter grades. Grey bars are non-letter outcomes.
How the non-letter outcomes are counted
They are excluded from the GPA entirely rather than scored, because counting a P as a 4.0 would be a fabrication.
By instructor
| Instructor | Predicted GPA | Raw | n | Terms | A range | Workload | Fall 2025 |
|---|---|---|---|---|---|---|---|
| WANG, WEI reviews ↗ | 3.68 | 3.68 | 502 | 6 | 76% | - | Open, 3 seats left |
Why Predicted is not the Raw average
“Predicted” is shrunk toward the course average, which is itself shrunk toward the department, so an instructor with a handful of students sits near the course mean rather than topping the list.
Grade records describe outcomes. For what a course is like to take, read student reviews written on dibs below or follow the separate external review link.
Workload and assignments
Work types reported in BruinWalk reviews of this course, across recorded instructors and terms. They may differ from this term's syllabus.
dibs has not read this course’s reviews, so it cannot say what kind of work it sets. That is dibs not having looked. It is not a course without papers or exams, and the reviews linked below are the answer until dibs catches up.
What comes first
The chain dibs can see is 5 courses long before COM SCI 245. Read from Fall 2026, because dibs has not read a class page for COM SCI 245 in Fall 2025 and a department can change what it requires. This is a floor, not a deadline: dibs has not read a class page for COM SCI 143, so the real chain can only be longer than this, never shorter.
Counted in courses rather than quarters: dibs does not know which of them a department lets you take together.
In Falls
Ran in 5 of the last 5 Falls.
From the terms dibs holds, which start in Fall 2021 and exclude summer. A department can run a course in a quarter it never has before.
From the registrar's catalog
Lecture, four hours; discussion, two hours; outside study, six hours. Requisite: course 143 or 180 or equivalent. With unprecedented rate at which data is being collected today in almost all fields of human endeavor, there is emerging economic and scientific need to extract useful information from it. Data analytics is process of automatic discovery of patterns, changes, associations, and anomalies in massive databases, and is highly inter-disciplinary field representing confluence of several disciplines, including database systems, data warehousing, data mining, machine learning, statistics, algorithms, data visualization, and cloud computing. Survey of main topics in big data analytics and latest advances, as well as wide spectrum of applications such as bioinformatics, E-commerce, environmental study, financial market study, multimedia data processing, network monitoring, social media analysis. Letter grading.
Sections in Fall 2025
You enroll in the discussion, not the lecture, so a discussion's status is the one that decides whether you get in. A lecture can read open while every discussion under it is full.
Seat counts as of : the oldest of these 8 readings. That term is over, so nothing has moved since.
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Lec 1 MW 2:00pm-3:50pmWaitlist
Wang, W. and Zhang, H.
3.68predicted, this instructor · 502 grades0 of 20 places taken. 80 of 80 · 1 over enrolled -
not checked yet2 discussions, none open. The way in is the lecture's waitlist, at 0 of 20.
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Lec 80 Time TBAOpen
Wang, W. and Gan, J.
3.68predicted, this instructor · 502 grades3 seats left. 22 of 25 enrolled -
not checked yet -
Lec 81 Time TBAOpen
Wang, W. and Hwang, J.
3.68predicted, this instructor · 502 grades9 seats left. 16 of 25 enrolled -
not checked yet -
Lec 91 MW 2:00pm-3:50pmWaitlist
Wang, W. and Wang, X.
3.68predicted, this instructor · 502 grades0 of 5 places taken. 25 of 25 · 1 over enrolled -
not checked yet2 discussions, none open. The way in is the lecture's waitlist, at 0 of 5.
Final enrollment, averaged across each term's sections: between 27 and 66 a term over 5 terms, summer excluded, most recently 36 in Fall 2025. That is the shape across years, not this term, which is above.
From the people who took it
Student reviews
What taking COM SCI 245 was like: the work, the teaching, and what students wish they’d known.
Your experience could be the first.
No student reviews are available to read on dibs for this course yet. Took it? Tell the next person what helped, what was hard, and how you spent your time.
Looking for more perspectives?
External reviews are separate and do not count toward the dibs rating.
Seats over time in Fall 2025
How each lecture has filled since dibs first saw it. This course runs 4 lectures; the legend under the chart picks one.
A dot is a reading where something moved: the seat count, the status, or the waitlist.
What a flat run means, and where a line starts
Flat between dots means it did not drift, it held and then jumped, and a line starts when dibs first saw that lecture rather than reaching back before it existed. A lecture that has never moved draws a flat line across the whole window, and one with two or three readings draws a line joining them, which is too few to read a trend from.
Lec 1 · Wang, W. and Zhang, H. · 80 of 80 · 1 over enrolled
Unchanged over 1 minute
Both readings say 80 of 80.
Lec 80 · Wang, W. and Gan, J. · 22 of 25 enrolled
Unchanged over 1 minute
Both readings say 22 of 25.
Lec 81 · Wang, W. and Hwang, J. · 16 of 25 enrolled
Unchanged over 1 minute
Both readings say 16 of 25.
Lec 91 · Wang, W. and Wang, X. · 25 of 25 · 1 over enrolled
Unchanged over 1 minute
Both readings say 25 of 25.
How readings and alerts work
A reading and an hourly record are different things, and most charts here hold more of the second missing than present. dibs has taken readings of a section since long before it began keeping an hour-by-hour log of when it looked, so the empty stretches are dibs saying it was not keeping that log yet, not that it looked and found nothing. That is the age of the record and not a fault.
Seat counts show the last successful read, not live availability. Refreshes can be delayed by request limits or upstream interruptions. Watched sections receive priority, but an hourly update for every section is not guaranteed.
The registrar can change a seat count between our checks. Alerts depend on dibs detecting an opening and completing delivery; a quiet watch does not prove that no seat opened. Check the registrar before enrolling.