1 00:00:00,690 --> 00:00:06,000 In the last few lectures, we saw how to predict a binary response using a single predicted. 2 00:00:06,920 --> 00:00:10,860 Now let us see how to handle multiple predictors. 3 00:00:11,700 --> 00:00:14,070 So mathematically, the danger is very small. 4 00:00:16,320 --> 00:00:19,320 Earlier, we had only B does, you know, plus B, the one X. 5 00:00:19,830 --> 00:00:25,890 Now it will include all the B predictors that we are going to use and will have correspondingly B plus 6 00:00:25,890 --> 00:00:26,100 one. 7 00:00:26,100 --> 00:00:26,500 B does. 8 00:00:26,500 --> 00:00:27,330 So we predicted. 9 00:00:29,890 --> 00:00:32,410 With this small change, we will grindy model again. 10 00:00:32,680 --> 00:00:40,810 This is maximum likelihood criteria and we will get the values of all these redoes using the beta values, 11 00:00:40,930 --> 00:00:45,010 we can get the probability value for any set of observations. 12 00:00:45,520 --> 00:00:51,580 And if the probability is greater than the boundary limit, which we can set as but our own convenience 13 00:00:52,660 --> 00:00:57,720 for our house placing it, it will be using a body limit of zero point five. 14 00:00:59,200 --> 00:01:05,260 So if the program is coming out to be more than point crape, we will see that the house will be sold 15 00:01:05,320 --> 00:01:06,280 within three months. 16 00:01:06,670 --> 00:01:11,620 If it is coming less than point, we will say that it will not be sold within three months. 17 00:01:13,600 --> 00:01:16,300 So this is how we handle multiple predictors. 18 00:01:17,390 --> 00:01:23,410 Anything I want to talk about here is can we handle multiple classes in the response variable? 19 00:01:24,310 --> 00:01:30,640 So right now our dataset has only two classes and the response variable, that is whether it will be 20 00:01:30,640 --> 00:01:32,570 sold within three months or not. 21 00:01:33,850 --> 00:01:41,080 If our response variable had three classes, say, whether it will be sold within three months, within 22 00:01:41,080 --> 00:01:42,790 a year or more than a year. 23 00:01:43,840 --> 00:01:44,680 Can that be done? 24 00:01:46,090 --> 00:01:46,930 Answer is yes. 25 00:01:47,470 --> 00:01:54,010 Logistic regression can be applied for multi class response variable, and it can be done in most software 26 00:01:54,010 --> 00:01:56,110 packages like art and Python easily. 27 00:01:56,920 --> 00:02:02,080 But in practice, we do not use logistic regression in such a scenario. 28 00:02:03,160 --> 00:02:07,930 One of the popular techniques in such a scenario is linear discriminant analysis. 29 00:02:10,030 --> 00:02:15,790 So let us first train the model with binary classes and all the predictors we have in our dataset. 30 00:02:17,140 --> 00:02:21,640 Then I will tell you about linear discriminant analysis in the coming few lectures.