Ask Ghassem - Recent questions tagged supervised-learning

Can we have multiple target values in a ML problem dataset for supervised learning?

Sun, 30 May 2021 16:31:48 +0000

Can PCA be used for supervised learning?

Tue, 18 Feb 2020 21:49:18 +0000

Can PCA be used for supervised learning???

I've seen some data scientists using PCA to transform their data for only numerical variables.

However, some other data scientists say that it is only used for unsupervised ML techniques.

What loss function to use in CNN-SVM model

Sat, 08 Jun 2019 09:24:21 +0000

I am using Matlab R2018b and am trying to infuse SVM classifier within CNN. My plan is to use CNN only as a feature extractor and use SVM as the classifier. I know people have already implemented it a few years back either in tensorflow or in other platforms. In implementing this I got stuck at a point during backward propagation. I got puzzled about which loss function I need to implement to upgrade the gradients and the parameters.

Few points came up during this:

1. I got a feeling to implement the hinge loss here. But which form of hinge loss should I implement? Should I move on to the second form of hinge loss implementation for calculating loss during backward propagation?

2. Besides, calculating the backward loss, should I calculate the forward loss as well to find out the loss occurred in the model?

Any form of advice doing this CNN-svm infusion will be appreciated as I am unable to find any such material implemented in Matlab to get help.

Thanks.

What is the difference between supervised and unsupervised machine learning?

Thu, 27 Sep 2018 05:24:53 +0000