LFD Book Forum Lecture 10 : Perceptron Logic OR gate
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#1
10-30-2012, 07:36 PM
 drudru Junior Member Join Date: Oct 2012 Posts: 2
Lecture 10 : Perceptron Logic OR gate

Hello,

In Lecture 10 - slides 9-11:

Shouldn't the bias be -0.5 (some number < 0) for the OR() perceptron?
aka w = (-0.5,1,1). Otherwise an input of (0,0) on (1.5,1,1) would be at 1.5 or True.

AND() is w = (-1.5,1,1), and that is consistent with SIGN as the threshold.

I searched the slides and I couldn't find a definition of the perceptron threshold function other than SIGN.

Dru
#2
10-30-2012, 08:55 PM
 yaser Caltech Join Date: Aug 2009 Location: Pasadena, California, USA Posts: 1,478
Re: Lecture 10 : Perceptron Logic OR gate

Quote:
 Originally Posted by drudru Hello, In Lecture 10 - slides 9-11: Shouldn't the bias be -0.5 (some number < 0) for the OR() perceptron? aka w = (-0.5,1,1). Otherwise an input of (0,0) on (1.5,1,1) would be at 1.5 or True. AND() is w = (-1.5,1,1), and that is consistent with SIGN as the threshold. I searched the slides and I couldn't find a definition of the perceptron threshold function other than SIGN.
The binary convention we use is rather than . With this convention, the above values work out.
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#3
10-30-2012, 11:17 PM
 drudru Junior Member Join Date: Oct 2012 Posts: 2
Re: Lecture 10 : Perceptron Logic OR gate

Ah, thank you.

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