Convolutional Neural Networks(CNN): Good for image recognition Long Short-term memory network(LSTM): Good for sequential data such as speech recognition RNN: simpler version of LSTM

Neuron: holds a number between 0-1. Sigmoid Function or σ(x) or sig(x)= 1/(1+e^-x) = 1/(1+exp(-x)) When x goes to +etheral f(x) goes to 1, in contrast when x goes to - etheral f(x) goes to 0 ReLU: 𝑓(𝑥)=max(0,𝑥) there are other types of relu also Matrix Product: 3x2 matrix has 3 rows and 2 columns, 2x3 matrix has 2 rows and 3 columns, can be productable eachother

Pytorch Installation

We will need Python 3. I have a macbook pro 2020 which has 2.7 python as default python —version -> 2.7.18

Way 1 Install Python 3 and make alias

I have installed python3 already but system still use python2 So we need to make alias python to python3 using alias python=‘python3’ in ~/.bash_profile Do not try to remove default python 2.7

Way 2 Install Anaconda and create enviroment for different Python interpreters

If you install anaconda package manager it also install own python interpreter. After installing anaconda type conda command to get into conda shell, you will have another version of python3

You can create enviroments so there are some commands to manage it

conda create --name env_name python=3.7 conda activate env_name conda install matplotlib numpy jupyter conda deactivate conda env list