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Handling Imbalanced Dataset Using Cost Sensitive Neural Networks- Credit Card Fraud Detection
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- čas přidán 19. 11. 2020
- github: github.com/kri...
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#HandlingImbalancedDataset
Hi Krish, good video on class weights. One thing to I'd suggest is to use the `stratify` parameter in the train_test_split() function: scikit-learn.org/stable/modules/generated/sklearn.model_selection.train_test_split.html
This will ensure that your dataset is stratified keeping the same proportion of class_0 and class_1 in both your training set and your test set when you do the split.
This also ensures you keep the same class_weight that you calculated with your calculator from the df['Class'].value_counts() , which showed 577:1 ratio of classes, versus when you calculated the proportion of y_train.value_counts() when you get a different ratio of 559:1.
So, TL;DR, just use the `stratify` param in your split to maintain the same class proportions in your train set and your test set.
So sir plz make video on how we can use F1 as metrics in model.compile! Keras do not provide it by default.
Using F1 score we can make sure both fn and fp are less
A classification report would have explained exactly how the model performs in classifying the classes. Maybe that would've helped
Sir when using roc_auc it seems to be high even when we have too much false positives .Using F1 score can help to see if both fp,fn are less or more .
So sir plz make video on how we can use F1 as metrics in model.compile! Keras do not provide it by default.
Use tfa.metrics.F1Score or make custom function for f1score
Thank you 💞 for this video
Just amazing work, thank you, sir!
Hi krish it would be awesome if ineuron launches an affordable course on A-Z of data structures and competitive prog. With all the mathematics included.
What is different between over sampling and Weight handling technique ? And which is best fit for which conditions ?
When he said titan rtx i was so exited which one graphics you have?
hey, love the way you explain. I’m interested in buying the new MacBook with M1 chip, What would you suggest me to go for? The MacBook Air (8Gb ram 256ssd) or MacBook Pro (8Gb ram 256ssd)?
Hi Krish, I have a doubt. I am facing an issue where my system is not calculating batch size, it uses the entire training set in model fitting.
Suppose in model fitting it shows "Train on 199364 samples" and the epoch should have been like 199364/32 ~= 6231, but its still training on 199364 samples. By default our batch_size = 32, if not provided in model.fit.
Awesome video sir!!!!
Hi, Thank you. How can we apply cost sensitive on bayesian network for prediction of imbalanced data?
Thank you sir
Hello Sir !
Could you please describe how SMOTE technique can be used to balance data images
Can I use sample_weight instead of class_weight in your example?
Can we use same basic for multi-class classification problem??
Knish. Can you tell the ideal % of 0&1 classes to say them as imbalanced
SIR , how to apply the the same for multi-label classification ?
Sir for dataset size, 44 unbalanced, how much have to be the test rain split. For that if we apply DL, is there problem?
if we run the ANN second time ...the scores are different ..if we print classification report the f1 scores are quite different..canu explain how to deal with this problem