MullOverThings

Useful tips for everyday

# How do you find the output of a neuron?

## How do you find the output of a neuron?

Now, you can build a Neural Network and calculate it’s output based on some given input. As you can see, it’s very very easy….

1. Multiply every incoming neuron by its corresponding weight.
2. Add the values up.
3. Add the bias term for the neuron in question.

## How do you find the net input to an output neuron?

The input to the output neuron y1 is 0*(-9)+1*9+1*(- 4.5)=4.5, and the output from the network Y1 is O(y1) = 1. The calculation for the input (1,1) goes. The input o1 to the left hidden neuron is 1*4+1*4+1*(-6) = 2. The output O1 from the left hidden neuron is then O(2) = 1.

## How are values computed in a neural network?

These values now serve as inputs for the output layer. The output-layer nodes are computed in the same way as the hidden-layer nodes, except that the values computed into the hidden-layer nodes are now used as inputs.

## How is the output of a neural network deterministic?

The demo neural network is deterministic in the sense that for a given set of input values and a given set of weights and bias values, the output values will always be the same. So, a neural network is really just a form of a function. Computing neural network output occurs in three phases.

## How many weights are in a demo neural network?

For the three-input, four-hidden, two-output demo neural network, there are a total of (3 * 4) + (4 * 2) + (4 + 2) = 20 + 6 = 26 weights. The demo neural network is deterministic in the sense that for a given set of input values and a given set of weights and bias values, the output values will always be the same.

## What is the first phase of a neural network?

The first phase is to deal with the raw input values. The second phase is to compute the values for the hidden-layer nodes. The third phase is to compute the values for the output-layer nodes. In this example, the demo does no processing of input, and simply copies raw input into the neural network input-layer nodes.