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Dr. Muhammad Anjum
@alexn11 ok sir, try me
@alexn11 TypeError: Cannot perform 'rand_' with a dtyped [float64] array and scalar of type [bool]
A[(A.Tmin>0) & (A.Tmax > 0)]
Dr. Muhammad Anjum
@alexn11 Sir, now it works .Great Sir, Sir, can I add you in priv chat if you have no problem ?
Dr. Muhammad Anjum
@alexn11 sir, you are great. Actually I am beginner , if I here send too much screen shots to ask questions , people becomes angry . so therefore! Thanks a lot . Now i can ask any question from you in that priv chat . Thanks a lotttttttttttt.
Bala venkatesh

checkout computer vision pre-trained model


Greetings, what do you recommend I read for machine translation learning best practices. Training models etc. Thanks
Rahul Bhatia

Cracking an interview can be a difficult task, especially in these times when there is a cut throat competition in the job market, after having interviewed heavily for Machine Learning and Data Science roles at big companies and startups, I have compiled a detailed list of Data Science Interview Resources, which I can assure will prepare you very well for an upcoming Data Science/ML Interview. And I update the list frequently with hand-picked quality resources, which you can use to prepare for your interviews! Best of luck!


Dr. Muhammad Anjum
@alexn11 hi sir
@anjumuaf123_twitter Hi sorry i'm quite busy at the moment, I cannot really answer your questions. I hope you have made some progress.
discord datascience best channel! i am out!
Eric Leung
Even if you don't understand methylation (I don't), this recent Twitter thread is a nice lesson in data leakage when training your machine learning models https://twitter.com/jmschreiber91/status/1291161574393221123 It contains screenshots of Python code as well so you can play around with it yourself.
Hello, can someone here explain a mathematical notation for me
Eric Leung
@hassanalt hey there! What kind of math notation are you looking for? As a first look, I'd search through this Wikipedia page or this GitHub page for how to decipher/translate some math notation to plain words
@erictleung I was wondering what this meant o(O(f(n))) = o(f(n))
Eric Leung
@hassanalt depends on the context. The O(f(n)) on the left might be referring to Big-O notation, but I'm not sure if you're working in that space of work. But even so within Big-O notation, I'm not sure what the lowercase O is referring to. What area of work is this equation showing up in?
I simply saw it in my lecture and the professor did not quite explain it.
Was in a list of assertions
Eric Leung
@hassanalt mmm okay. Well, the little "o" may mean little o notation, which is the loose upper bound of how fast an algorithm can go https://www.geeksforgeeks.org/analysis-of-algorithems-little-o-and-little-omega-notations/ So it appears that the general runtime of f(n) (O(f(n))) is equivalent to f(n) itself. This might make sense in the right context, but right here, it kinda doesn't mean much. I hope the notation explanation can lead you to the right direction. You can read more about time complexities here https://en.wikipedia.org/wiki/Time_complexity#Table_of_common_time_complexities
HI Team, I am trying to make a recommendation engine for a food delivery app. I was going through different things like Market Basket Analyisis etc.. Company have huge amount of data for orders from different customers. Could you please help me on where to start?
Eric Leung
@dinaklal you could look at association rule learning https://en.wikipedia.org/wiki/Association_rule_learning and a better way to narrow down how to implement this (or any other method you choose) is to choose a programming language (e.g., Python or R) and then look for packages that can do product recommendations and start building a minimal workingg example before finding tuning it
Kobi Bar Hanin
Hi! I’ve built an interactive git cli - igit. Check it out: https://github.com/kobibarhanin/igit to install: pip install igit
Vijish Madhavan
Introducing ArtLine, create amazing Line Art Portraits.
hello ,i am from this url address https://github.com/freeCodeCamp/open-data/tree/master/open-api, and I really need some datasets about students' performance to do some knowledge tracing reasearch. Is there anybody could tell me how can I get "api key"?
Eric Leung
@935462955 thanks for your interest! I don't believe the API is fully developed. However, that repository does have a bunch of other datasets you can consider.
Is that all the FCC data? The data in recent years may be helpful to me, but I don't seem to find it
Eric Leung
@935462955 that should be all the data that we're allowing to the public for now
Alice Jiang
Long time, no see. Do we have any of our regulars around anymore?
Abdul Qoyyuum
I wanted to log back in to FreeCodeCamp but no matter what I try to login with, it won't let me.
I can't find a "Forget password" or a way to contact to reset my account. Can anyone help?
Dr. Muhammad Anjum
@Qoyyuum Dear no other way , you can create new password
2 replies
@Qoyyuum If you 'sign in' with other auth services like google account or github which has the same email address as your first registered, FCC will find you as same person/account
3 replies
Dhwaj Sharma
Muhammad Yasir
i have a question regarding dataset imbalance
so i will elaborate
Muhammad Yasir

I have a dataset which is for binary classification ( or at least we are approaching it from a binary classification perspective )

There are a total of 2.5 million rows, with label 0 belonging to around 220000 (2.2 million) rows and label 1 belonging to around 321000 (0.3 million) rows , there are around 45 features.

The imbalance approaches a ratio of around 1 : 7

My problem is very straightforward, even WITHOUT any data preprocessing if i try to classify the data

the classification algorithms, no matter what parameters are set, give around 99% in ALL performance metrics ( accuracy, precision, recall, f1 score etc )

This would probably suggest a bad case of overfitting but i am not sure, feel free to explain and add your opinion to what could be the reason

I tried to visualize the graph using TSNE and saw that the entire data is shaped like an ellipse and there is heavy overlap between both the lables. This means that (1) data is badly imbalanced (2) data is badly overlapped , i highly doubt i can use anomaly detection there as all the 'anomalies' (label 1) are sitting close with the 'normal' (label 0) data

any suggestions on how i should proceed ?

7 replies
Dr. Muhammad Anjum
@SyedMuhamadYasir Hi Dear I need some help plz
Hi, I need help with the API Key
HELP any chance somebody can help with this mysql install/config/socket error?
I am running "mysql_secure_installation" and getting
sudo mysql_secure_installation

Securing the MySQL server deployment.

Enter password for user root:
Error: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
Michael Li 🚀Publish Reproducible Jupyter Notebook
Does anyone else find Matplotlib's API hard to remember? I have friends who just export their Pandas data and plot with Excel. I spend a lot of time googling Matplotlib help. How do you make your Python Data Plots?
1 reply
Josh Goldberg
Yes. Matplotlib is not an intuitive API in my opinion. I prefer ggplot2.
@becausealice2 @erictleung Still here after all these years!
Alice Jiang
@GoldbergData Kinda sorta.... I check in every once in a while but I've made a career change and have been buy trying to keep up with all that comes with that. How have you been? any interesting projects?
I have a question. Lets say a car can have full trust output range [0,1] and can stire to left and right output range [-1,1] and an ANN should find the right values. Lets say the ANN should have the output [trust,stire angle]. Can i just split the raw output of the last linear layer and apply sigmoid to first output and tanh to 2nd output or has the activation to be the same for all entries of the output of the last linear layer?
Quincy Larson

Hey @/all freeCodeCamp is building a data science curriculum with advanced math and data science projects. Learn more here: https://www.freecodecamp.org/news/building-a-data-science-curriculum-with-advanced-math-and-machine-learning/

We are looking for open source contributors and experienced math + CS teachers for (paid) help with instructional design. If you are interested, please reach out to me at quincy@freecodecamp.org