Comments (2)
Hey Kenway, since no has replied back to you yet, I'll try and help.
np.dot is a matrix multiplication while * is an element wise product. So, if you have followed his notes by the line, the final matrix multiplication for djdw1 will be ([3XN]. ([NX2].[2X4]) * [NX4]). I am sorry for not writing the math equation because I don't know how to over here.
He first gets it down to:
[3XN] . [NX4] * [NX4]
Then:
[3XN] . [NX4] = [3X4]
from neural-networks-demystified.
Oh... Ok. Now I see... Thanks.
from neural-networks-demystified.
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