CS 451 Quiz 3
Model and cost function; Linear algebra with Octave / Matlab
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Model and Cost Function
What is
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What does the hypothesis function h attempt?
Consider the following cost function J:
Check all that are true
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The goal of linear regression is to
Gradient Descent
In the above plot, what does the vertical axis represent?
If the above function is minimized with gradient descent, the solution could depend on: (check all that apply)
Required
Linear algebra with Octave / Matlab
Consider the following problems in Octave / Matlab notation. Recall that [1, 2, 3] is a row vector, [1; 2; 3] is a column vector, and x' is the transpose of x.
If v = [2, 3, 4], what is v'?
If v = [2, 3, 4] and w = [2, 1, -1], what is v - w ?
If v = [2, 3, 4] and w = [2, 1, -1], what is w' - v' ?
If v = [2, 3, 4] and w = [2, 1, -1], what is v * w' ?
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