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Why must a nonlinear activation function be used in a backpropagation neural network? [closed]

I've been reading some things on neural networks and I understand the general principle of a single layer neural network. I understand the need for aditional layers, but why are nonlinear activation functions used? ...
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How to automatically generate N “distinct” colors?

...similar. I can also imagine evenly subdividing the RGB cube into a lattice and then drawing points. Does anyone know any other methods? I'm ruling out defining a list and then just cycling through it. I should also say I don't generally care if they clash or don't look nice, they just have to be vis...
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How to get the primary IP address of the local machine on Linux and OS X? [closed]

I am looking for a command line solution that would return me the primary (first) IP address of the localhost, other than 127.0.0.1 ...
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Algorithm to detect corners of paper sheet in photo

... working on this earlier this year. This was my first ever coding project, and kinda ended in a bit of a rush, so the code needs some errr...decoding... I'll give a few tips from what I've seen you doing already, and then sort my code on my day off tomorrow. First tip, OpenCV and python are awesom...
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How to crop an image in OpenCV using Python

... remember that x and y are flipped. I missed this. – markroxor Aug 26 '18 at 9:31 15 ...
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Evenly distributing n points on a sphere

...le code node[k] is just the kth node. You are generating an array N points and node[k] is the kth (from 0 to N-1). If that is all that is confusing you, hopefully you can use that now. (in other words, k is an array of size N that is defined before the code fragment starts, and which contains a lis...
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How to nicely format floating numbers to String without unnecessary decimal 0?

...f the idea is to print integers stored as doubles as if they are integers, and otherwise print the doubles with the minimum necessary precision: public static String fmt(double d) { if(d == (long) d) return String.format("%d",(long)d); else return String.format("%s",d); } ...
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How can I shrink the drawable on a button?

... You should use a ImageButton and specify the image in android:src, and set android:scaletype to fitXY Setting scaled drawable in code Drawable drawable = getResources().getDrawable(R.drawable.s_vit); drawable.setBounds(0, 0, (int)(drawable.getIntrins...
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Dynamically select data frame columns using $ and a character value

I have a vector of different column names and I want to be able to loop over each of them to extract that column from a data.frame. For example, consider the data set mtcars and some variable names stored in a character vector cols . When I try to select a variable from mtcars using a dynamic s...
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Java synchronized static methods: lock on object or class

... Please answer Elaborate so that everyone can understand. – Madhu Sep 2 '09 at 4:49 6 ...