Performance Metrics On MultiClass Classification Problems

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[@vibesnovibes6320]

Guys, lets applaud his efforts. This video is being shot at 12 in the morning :)

[@afrida3351]

I follow ur machine learning videos & it helps me a lot. Could you please make a video on multilevel multiclass performance metrics (absolute-true,absolute-false,accuracy,coverage,aiming)? I can't find out any appropriate source for it! Please try to do that!

[@ashishmondal5857]

To the point video. Awesome Krish. Your videos save hours of efforts for many students.

[@sandipansarkar9211]

That was a superb video.Got all my doubts clear.If you could the ipynb notebook or google colab for practise would be great .Thanks

[@husainkhatba8991]

Thank you again !

[@rajraji417]

Thank you Bro

[@sadabratakonar4219]

Sir, how do I know which row and which column refers to dog, cat or fox? I mean how to know row 1, 2 or 3 refers to a dog?

[@ankitashukla8879]

For multiclass classification which parameter will be more important precision or recall and why??

[@aseelsami.6322]

Hi what is support in the classification metrics report and what its equation also,what are micro average and other values in the below of report.

[@rambaldotra2221]

Great Sir.

[@sachinborgave8094]

Krish, please upload further Deep Learning videos.

[@sagarmestry5514]

Sir can you please upload video on indepth intuition of logistic regression cost function. It’ll really help to understand concept in better way

[@louerleseigneur4532]

Thanks Krish

[@mani3537]

how to find confusion matrix for model used in semantic segmentation??

[@emyeethiopia2890]

How do I plot the confusion matrix for multiclass image classification(say 4 class) while using ImageDataGenerator for augmentation in CNN algorithm?

[@AjaySharma-by6kr]

@Krish Naik. If we have too many classes, then I think confusion matrix will create confusion and not be that much easy to interpret. Sir any other performance matrix for multiclass classification except confusion matrix?????

[@ravikumarpawar2406]

in the report suppose: pre recall f1-score support a b c 0.0 0.0 0.0 3 what do mean by the above report it has an accuracy of more than 0.6 remaining two classes predicted the precision and recall score with support

[@MyRohit143]

What is correct confusion matrix , now I am confused , In some places FP become FN & vice versa

[@SandeepSingh-xe1ry]

Hello Sir, I am doing coding for the breast cancer dataset with Keras Sequential Model. while printing classification_report and confusion_matrix it says the following error ''Classification metrics can't handle a mix of binary and continuous targets'''. Previously, I was able to do the same, but now showing this error. Kindly help me out.

[@christianespana1]

can you explain how to plot ROC curve using Image Generator(flow from directory) in classification multi classes?. Please

[@jayasimhayenumaladoddi1602]

Dear sir, I am using Rbf. I want to know how to select the hyper parameters. please kindly help

[@siphendulwezaza9384]

Is it possible for precision, recall and f1-score to be zero? if yes then what does that mean

[@anshikachoudhary4134]

Sir please explain neural network technique on multi-class problem with imbalanced dataset

[@ParamChoksi-ve6yg]

Sir, please make a video on ROC and AUC with practical example..!!

[@sandipansarkar9211]

Thanks Krish for the explanation. But the github link is missing .

[@karthikganesh4679]

sir could u plz explain multi class classification with random forest

[@amrdel2730]

can you do an explanation of the DAG mumlticlasse scheme used on SVM

[@amrithabnair6546]

Sir can you explain Multi class student's performance prediction based upon on machine learning

[@mkproduction413]

How to calculate sensitivity and precision for multiclaa

[@Nitincse11]

What is mean avg precision?

[@shouryagupta8763]

U HAVE VIDEOS ON EVERY TOPIC

[@gamingterror8ov734]

Sir plz start classes on 10th standard Artificial intelligence plz

[@bharatchoudhary9836]

@krish naik,instead of using confusion matrix on multi class , can we use Kappa score as performance matrics on multi class

[@krishnaik06]

Yes we can..Kappa score should be looked at when uu imbalanced dataset

[@Aami2024]

@@krishnaik06 hi sir, on which dataset (test or is it validation?) We should perform this mterics

[@aashishraina2831]

simple question: You said when we have imbalanced data set , we cannot always go for accuracy, we have to consider precision or recall to judge the accuracy. Now the above final matrix which we have how can we find accuracy here, is it the F1 score we should consider, but there are 3 classes. I am a little confused here

[@aashishraina2831]

i have not received any answer of my previous question, looks like krish needs to hire assistant who cam answer, we all know how busy he is. I will have another question. if i have 3 classes : 0,12 i create Confusionmatrix for all 3 lest say accuracy for 0 is 98% for 1 is 66% and for 2 is 65%. considering my Training data set is equally distributed in classes, can we say model is biased for class 0

[@mandeepashiya2229]

@@aashishraina2831 most questions in comments go unanswered, hope it helps you - towardsdatascience.com/confusion-matrix-for-your-multi-class-machine-learning-model-ff9aa3bf7826

[@TanuMallya]

How to calculate "Specificity" here? Can someone please help?

[@vijai7017]

sir you have explained Accuracy and precision pretty well but Recall and other performance matrix are not explained only cursory introduction is given.

[@tannurohela6192]

Hey , for recall you just have to see the correctly predicted cats in y_pred and total number of actual cats in y_true. So according to data correclty predicted cats = 4 and total actual cats = 6 , so 4/6 = 0.667. Similarly for dog and fox. Ya that's it. I hope it was useful. Thank you... :)

[@nareshkumarnarula5630]

Hi Krish , Please upload the GitHub link for the above video. Thanks

[@muthukumarb1326]

Hi you calculated sensitivity ( #_of_ TP/#_of_TP+#_of_FP). But why scikit learn mentioning as Precision.

[@vipindube5439]

please upload the class file.

[@lokeshrathi5500]

What is support?

[@aseelsami.6322]

Do you kown wgat is support???

[@maged4087]

TypeError: Singleton array 2836 cannot be considered a valid collection.

[@sachinborgave8094]

First like

[@charlsjoseph]

It looks like FP and FN are interchanged. Sir, I'm confused as your previous video on binary classifier performance metrics - kzbin.info/www/bejne/l4ikn4F-ja5-rdk shows differently. Also didn't understand the precision calculation for cat. it should be row wise not column wise addition on denominator right ? My understanding on precision is Out of total positively predicted cats, how many are actually cat

[@charlsjoseph]

sorry , i'm wrong. You have interchanged the actual and predicted class in the confusion matrix.

[@skviknesh]

@@charlsjoseph It happens, i had the same doubt!