Archive for the ‘Deep learning’ Category

Install TensorFlow using Anaconda

July 17, 2017 Leave a comment

If you search online, there will be so many posts on how to install TensorFlow on mac, some are older ones, some are new, hard to decide which one to follow. Let’s just make the flow easier so we can focus on the core part to explore the deep learning.

Please note that starting v1.2 TensorFlow no longer support GPU on mac-os, so in the followings, we will just install the CPU version. It’s good to start with something simple. There are two ways of install it under Anaconda.

Use ‘conda’ command which can be quite straight forward.

# Python 2.7
$ conda create -n tensorflow python=2.7

$ source activate tensorflow
(tensorflow)$  # Your prompt should change

# Use 'conda' command: Linux/Mac OS X, Python 2.7/3.4/3.5, CPU only:
(tensorflow)$ conda install -c conda-forge tensorflow

Screen Shot 2017-07-17 at 4.26.00 PM

or use the pip command

(tensorflow)$ pip install --ignore-installed --upgrade \



You can follow up to install keras and ipython within the env:

# note this will downgrade tensor flow to 1.0

conda install -c conda-forge keras=2.0.2

conda install ipython


Categories: Deep learning, MacOS

Installing mxnet

December 23, 2015 Leave a comment

I wanted to install the newly released deep learning package “mxnet” on my mac. Here’s the instruction site:

It mostly comes fine, but I did have few problems including some linking error.

One is with ‘libtbb.dylib’, it keep complaining that it couldn’t find the lib, but when I check it it is in the right folder `/usr/local/lib` — which is actually a soft link to “/usr/local/Cellar/tbb/4.4-20150728/lib/”. The problem is actually because of the false configuration in opencv.pc. So what I did was to open “/usr/local/lib/pkgconfig/opencv.pc” (which provides the meta-information for pkg-config) and change -llibtbb.dylib to -ltbb.

I also got other few linking errors for libJPEG.dylib, libtiff.dylib and libpng.dylib. What I found is that they points to few libs like “/usr/local/Cellar/jpeg/8d/lib/libjpeg.dylib” or “/usr/local/Cellar/libtiff/4.0.6/lib/libtiff.dylib” but it seems that they are not the ones expected.

Screen Shot 2015-12-23 at 10.56.47 AM

Screen Shot 2015-12-23 at 10.57.30 AM

To fix this:

# creates the locate database if it does not exist, this may take a longer time, so be patient
sudo launchctl load -w /System/Library/LaunchDaemons/

#do locate to locate the actual lib, for example
locate libJPEG.dylib

# suppose you got the path from the above command as abspath_to_lib, if the lib already exist in /usr/local/lib, you can remove it first.
ln -s abspath_to_lib /usr/local/libJPEG.dylib

Now, you can run one mnist example by `python example/image-classification/`. It should display the following results:

Screen Shot 2015-12-23 at 11.20.01 AM.png


Few Python base Deep Learning Libs

June 23, 2015 Leave a comment

Lasagne: light weighted Theano extension, Theano can be used explicitly

Keras: is a minimalist, highly modular neural network library in the spirit of Torch, written in Python, that uses Theano under the hood for fast tensor manipulation on GPU and CPU. It was developed with a focus on enabling fast experimentation.

Pylean2: wrapper for Theano, yaml, experimental oriented.

Caffe: CNN oriented deep learning framework using c++, with python wrapper, easy model definitions using prototxt.

Theano: general gpu math

nolearn: a probably even simpler one

you can find more here.

For Lasagne and nolearn, they are still in the rapid develop stage, so they changes a lot. Be careful with the versions installed, they need to match each other. If you are having problems such as “cost must be a scalar”, you can refer link here to solve it by uninstall and reinstall them.

pip uninstall Lasagne
pip uninstall nolearn
pip install -r

Install Deepnet on Mac

November 15, 2013 3 comments

This may help to have Nitish’s deepnet work on your mac. The code is very clean, most important thing is to follow the instructions here


a) You will need Numpy, Scipy installed first, because the tools is largely python. Simply way is to use ‘brew‘. For example, follow the instructions here.

b) CUDA Toolkit and SDK.
Follow the instructions(CUDA5.5):
NVIDIA CUDA Toolkit (available at

I followed both instruction on
and instruction from the deepnet to set the system paths:

export PATH=/Developer/NVIDIA/CUDA-5.5/bin:$PATH

Follow the deepnet instruction: for mac, it is the ‘~.profile’, edit/add to the file:

export CUDA_BIN=/usr/local/cuda-5.0/bin
export CUDA_LIB=/usr/local/cuda-5.0/lib

First make sure CUDA installed right:
install the examples: <dir>

and go to /Developer/NVIDIA/CUDA-5.5/samples, choose any simple example subfolder, go into and do ‘make’, after make completed, you can do a simple test.

(c) Protocol Buffers.

Download the file:

Follow the instructions to compile/install it.  It will be install (generally in /usr/local/bin/protoc). It was said that you only need to include the directory that contains ‘proc’, so add to path:
export PATH=$PATH:/usr/local/bin


For making the cuda work, do ‘make’ in cudamat , but change all the ‘uint’ to ‘unsigned’ in file: cudamat_conv_kernels.cuh
or do a #define uint unsigned
Then run ‘make’ in cudamat folder

(3,4) STEP 3,4

continue follow step 3, and 4 on you will get there.

Note (1): I did not install separately for  cudamat library by Vlad Mnih and cuda-convnet library by Alex Krizhevsky.

Note (2): If you do NOT have GPU: another alternative is to not use GPU, most recent mac come with NVIDIA 650, but some old version may use intel graphical card. In that case you can still do the deep learning part, but using eigenmat. The drawback is that it will be very slow. 

Install eigen from here:
if given error <Eigen/..> can not found, change to “Eigen/…”
also you need to change python path, including path to where ‘libeigenmat.dylib’ located. It it still fails to find: libeigenmat.dylib. It may not hurt to give it a direct path, edit the file <eigenmat/>.
_eigenmat = ct.cdll.LoadLibrary(‘the-path-to/libeigenmat.dylib’)