A list of doubts.. I was revising stuffs

[nikhil_sarda]

Doubt 1: What is meant by 3 dimensional matrix, it dimension is defined as r x c?
Doubt 2: If v is a 3 dimensional vector then A * B * v is a 3 dimensional matrix—> how is this correct as the product gives a 3 x 1 matrix (or 3 dimensional vector).
Doubt 3: Will we not be taught logistic regression with multiple feature(n-ary classification)

[S18CRX0120 (Vasu Gupta)]

Hey @nikhil_sarda,

@nikhil_sarda

Doubt 1: What is meant by 3 dimensional matrix, it dimension is defined as r x c?

3 dimensional matrix will have shape/dimensions of something like this (r,c,h)

@nikhil_sarda

Doubt 2: If v is a 3 dimensional vector then A * B * v is a 3 dimensional matrix—> how is this correct as the product gives a 3 x 1 matrix (or 3 dimensional vector).

The question is wrong you can’t multiply matrix of 2 D with 3 D

@nikhil_sarda

Doubt 3: Will we not be taught logistic regression with multiple feature(n-ary classification)

It is more or less same, you can do it yourself if its not taught. Like n-ary linear regression.

Hope this resolved your doubt.
Plz mark the doubt as resolved in my doubts section.

[S18CRX0120 (Vasu Gupta)]

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