Suggeestion: Cost function

Course Q&A Deep Learning Specialization Structuring Machine Learning Projects
1

Hello everyone,

In the first week, in the video with the label of “Satisficing and Optimizing Metric”, and at 1:07, a cost function is defined. Usually, we want to minimize the cost function; however, here, we need to maximize the following formula:

cost = accuracy - 0.5*running_time.

I suggest to use

cost = -(accuracy - 0.5*running_time) or change the name “cost”.

What do you think?

Cheers,
Nazanin

2

Hey @n.hashemia,

Or we can just think about it as a negative cost :wink:

3

Thank you for your answer.
You mean:
cost = -(accuracy - 0.5*running_time) or change the name to “negative_cost”?

4

I think that the course is structured in a way to deliver a general idea in simple words. You can do either way, your intuition is correct.

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