nickgravish

def test_foo(k):
    t = np.linspace(0,1,1000)
    plt.figure(figsize=(8,2.5)) 
    plt.plot(t, np.sin(t*k))
    
interact(test_foo, k=(0,1000))

nickgravish

# for new ipython 
%load_ext rpy2.ipython
import rpy2.robjects as robjects
from rpy2.robjects.packages import importr
import rpy2.robjects.packages as rpackages
from rpy2.robjects.vectors import StrVector

# This now installs the packages, so only need to run once
utils = rpackages.importr('utils')
utils.chooseCRANmirror(ind=2) # select the first mirror in the list

nickgravish

adopted from https://scivision.co/anaconda-python-opencv3/

cmake -DBUILD_TIFF=ON -DBUILD_opencv_java=OFF -DWITH_CUDA=OFF -DENABLE_AVX=ON -DWITH_OPENGL=ON -DWITH_OPENCL=ON -DWITH_IPP=ON -DWITH_TBB=ON -DWITH_EIGEN=ON -DWITH_V4L=ON -DBUILD_TESTS=OFF -DBUILD_PERF_TESTS=OFF -DCMAKE_BUILD_TYPE=RELEASE -DCMAKE_INSTALL_PREFIX=$(python3 -c "import sys; print(sys.prefix)") -DPYTHON_EXECUTABLE=$(which python3) -DPYTHON_INCLUDE_DIR=$(python3 -c "from distutils.sysconfig import get_python_inc; print(get_python_inc())") -DPYTHON_PACKAGES_PATH=$(python3 -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())") -FFMPEG_INCLUDE_DIR " /usr/local/Cellar/ffmpeg/2.5.3/include/" -FFMPEG_LIB_DIR "/usr/local/Cellar/ffmpeg/2.5.3/lib" -WITH_FFMPEG 1 -BUIILD_opencv_python2 ..

on the laptop

cmake -DBUILD_TIFF=ON -DBUILD_opencv_java=OFF -DWITH_CUDA=OFF -DENABLE_AVX=ON -DWITH_OPENGL=ON -DWITH_OPENCL=ON -DWITH_IPP=ON -DWITH_TBB=ON -DWITH_EIGEN=ON -DWITH_V4L=ON -DBUILD_TESTS=OFF -DBUILD_PERF_TESTS=OFF -DCMA

nickgravish

Starting with R installed from the download on the CRAN website.

install rpy2 from source using

python setup.py build install     

running the unit test gives

nickgravish

To add a custom python module so that I can access it everywhere

1. Make the python module, use a simple directory structure

  ~/Python/modulename/
    -> readme.md
    -> modulename/
 -> __init__.py

nickgravish

How to setup a python environment for running bleeding edge popupcad

Here are the steps to run the development version of popupcad on a Mac OSX (Yosemite).

Install commands to be copy and pasted into the command line

yes | conda create -n popupcad_env python=3.4
source activate popupcad_env

nickgravish

http://wiki.ros.org/ROS/Tutorials/MultipleMachines

Fix networking issue "no "AF_INET"

http://answers.ros.org/question/163556/how-to-solve-couldnt-find-an-af_inet-address-for-problem/

nickgravish

pyqtgraph/pyqtgraph#104

conda install PyOpenGL PyOpenGL-accelerate

Connect an update function to a qt timer

http://stackoverflow.com/questions/18080170/what-is-the-easiest-way-to-achieve-realtime-plotting-in-pyqtgraph

nickgravish

Steps to install opencv3 for use with Python 3 and h264 videos

1. On fresh install of ubuntu download and install conda (I like to work with Conda)
2. To get h264 videos working we need to install the codec. We also need to install ffmpeg for opencv. First the code

sudo apt-get install ubuntu-restricted-extras

3. Install and compile ffmpeg based on [https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu]{https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu}

nickgravish

import matplotlib # for pycharm
matplotlib.backend('Qt4Agg') # for pycharm

import numpy as np
import cv2 as cv
import matplotlib.pyplot as plt