LFD Book Forum  

Go Back   LFD Book Forum > Course Discussions > Online LFD course > The Final

Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 09-17-2012, 06:55 AM
vtrajan@vtrajan.net vtrajan@vtrajan.net is offline
Junior Member
Join Date: Jul 2012
Posts: 5
Default Question 7-9: all overwhelms one, should we use weights

Dear Prof:
I questions 7-9, in one vs all, the number of all instances is about 9 times the number of one, so it overwhelms the one. The results are skewed in one direction. Should we use different weights to compensate for this? Give weights for each class proportional to 1/number of instances?

As it stands now, I am not sure the answers are that meaningful.

But I would guess that the answers that the system accepts assumes that there is no weighting of the classes, each instance has the same weight.

Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -7. The time now is 04:49 PM.

Powered by vBulletin® Version 3.8.3
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
The contents of this forum are to be used ONLY by readers of the Learning From Data book by Yaser S. Abu-Mostafa, Malik Magdon-Ismail, and Hsuan-Tien Lin, and participants in the Learning From Data MOOC by Yaser S. Abu-Mostafa. No part of these contents is to be communicated or made accessible to ANY other person or entity.