Exploring Chaotic Attractors in Jupyter Lab - Aizawa Attractor

In [45]:

%matplotlib inline
import numpy as np
import matplotlib.pyplot as plt
# This import registers the 3D projection, but is otherwise unused.
from mpl_toolkits.mplot3d import Axes3D  # noqa: F401 unused import


def aizawa(x, y, z, a=0.95, b=0.7, c=0.1,d=3.5,e=0.25,g=0.6):
    '''
    Given:
       x, y, z: a point of interest in three dimensional space
       s, r, b: parameters defining the lorenz attractor
    Returns:
       x_dot, y_dot, z_dot: values of the lorenz attractor's partial
           derivatives at the point x, y, z
    '''
    x_dot = (z-b)*x - d*y
    y_dot = d*x + (z - b)*y
    z_dot = g + a*z - ((z**3)/3) - ((x**2) + (y**2))*(1 + e*z) + c*z*(x**3)
    
    return x_dot, y_dot, z_dot


dt = 0.01
num_steps = 7000

# Need one more for the initial values
xs = np.empty(num_steps + 1)
ys = np.empty(num_steps + 1)
zs = np.empty(num_steps + 1)

# Set initial values
xs[0], ys[0], zs[0] = (0.1, 0, 0.1)

# Step through "time", calculating the partial derivatives at the current point
# and using them to estimate the next point
for i in range(num_steps):
    x_dot, y_dot, z_dot = aizawa(xs[i], ys[i], zs[i])
    xs[i + 1] = xs[i] + (x_dot * dt)
    ys[i + 1] = ys[i] + (y_dot * dt)
    zs[i + 1] = zs[i] + (z_dot * dt)


# Plot
fig = plt.figure()
ax = fig.gca(projection='3d')

ax.plot(xs, ys, zs, lw=0.5)
ax.set_xlabel("X Axis")
ax.set_ylabel("Y Axis")
ax.set_zlabel("Z Axis")
ax.set_title("Aizawa Plot")

plt.show()

plt.plot(xs)

Out[45]:

[<matplotlib.lines.Line2D at 0xae304d2c>]

In [ ]:

SAMBA We Need SAMBA!!

Nobody who uses linux and windows side by side can do without a file server on the linux side and that boils down to samba. But its a nightmare getting it going from scratch because theyve not preconfigured it for windows.Well not fully and you need a config file that works so Im uploading mine so everyone can copy it and not go through the 3-4 hrs trying to get it to work everytime and also so I can have a copyon the net:

1. edit or replace your /etc/samba/smb.conf with the following

2. sudo smbpasswd yourusername

3. restart or start your samba server
sudo service smbd restart

4. Open windows explorer \\youripaddess\yourusername

user = yourusername
pass = sambapasswd

and your done.X




#
# Sample configuration file for the Samba suite for Debian GNU/Linux.
#
#
# This is the main Samba configuration file. You should read the
# smb.conf(5) manual page in order to understand the options listed
# here. Samba has a huge number of configurable options most of which
# are not shown in this example
#
# Some options that are often worth tuning have been included as
# commented-out examples in this file.
#  - When such options are commented with ";", the proposed setting
#    differs from the default Samba behaviour
#  - When commented with "#", the proposed setting is the default
#    behaviour of Samba but the option is considered important
#    enough to be mentioned here
#
# NOTE: Whenever you modify this file you should run the command
# "testparm" to check that you have not made any basic syntactic
# errors.

#======================= Global Settings =======================

[global]


## Browsing/Identification ###

# Change this to the workgroup/NT-domain name your Samba server will part of
   workgroup = WORKGROUP

server string = %h server (Samba, Kali)




#### Networking ####

# The specific set of interfaces / networks to bind to
# This can be either the interface name or an IP address/netmask;
# interface names are normally preferred
  interfaces = your.local.net.0/24 127.0.0.0/8 eth0 wlan0

# Only bind to the named interfaces and/or networks; you must use the
# 'interfaces' option above to use this.
# It is recommended that you enable this feature if your Samba machine is
# not protected by a firewall or is a firewall itself.  However, this
# option cannot handle dynamic or non-broadcast interfaces correctly.
   bind interfaces only = yes



#### Debugging/Accounting ####

# This tells Samba to use a separate log file for each machine
# that connects
   log file = /var/log/samba/log.%m

# Cap the size of the individual log files (in KiB).
   max log size = 1000

# We want Samba to only log to /var/log/samba/log.{smbd,nmbd}.
# Append syslog@1 if you want important messages to be sent to syslog too.
   logging = file

# Do something sensible when Samba crashes: mail the admin a backtrace
   panic action = /usr/share/samba/panic-action %d


####### Authentication #######

# Server role. Defines in which mode Samba will operate. Possible
# values are "standalone server", "member server", "classic primary
# domain controller", "classic backup domain controller", "active
# directory domain controller".
#
# Most people will want "standalone server" or "member server".
# Running as "active directory domain controller" will require first
# running "samba-tool domain provision" to wipe databases and create a
# new domain.
   server role = standalone server

   obey pam restrictions = yes

# This boolean parameter controls whether Samba attempts to sync the Unix
# password with the SMB password when the encrypted SMB password in the
# passdb is changed.
   unix password sync = yes

# For Unix password sync to work on a Debian GNU/Linux system, the following
# parameters must be set (thanks to Ian Kahan <<kahan@informatik.tu-muenchen.de> for
# sending the correct chat script for the passwd program in Debian Sarge).
   passwd program = /usr/bin/passwd %u
   passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .

# This boolean controls whether PAM will be used for password changes
# when requested by an SMB client instead of the program listed in
# 'passwd program'. The default is 'no'.
   pam password change = yes

# This option controls how unsuccessful authentication attempts are mapped
# to anonymous connections
   map to guest = bad user

########## Domains ###########

#
# The following settings only takes effect if 'server role = primary
# classic domain controller', 'server role = backup domain controller'
# or 'domain logons' is set
#

# It specifies the location of the user's
# profile directory from the client point of view) The following
# required a [profiles] share to be setup on the samba server (see
# below)
;   logon path = \\%N\profiles\%U
# Another common choice is storing the profile in the user's home directory
# (this is Samba's default)
#   logon path = \\%N\%U\profile

# The following setting only takes effect if 'domain logons' is set
# It specifies the location of a user's home directory (from the client
# point of view)
;   logon drive = H:
#   logon home = \\%N\%U

# The following setting only takes effect if 'domain logons' is set
# It specifies the script to run during logon. The script must be stored
# in the [netlogon] share
# NOTE: Must be store in 'DOS' file format convention
;   logon script = logon.cmd

# This allows Unix users to be created on the domain controller via the SAMR
# RPC pipe.  The example command creates a user account with a disabled Unix
# password; please adapt to your needs
; add user script = /usr/sbin/adduser --quiet --disabled-password --gecos "" %u

# This allows machine accounts to be created on the domain controller via the
# SAMR RPC pipe. 
# The following assumes a "machines" group exists on the system
; add machine script  = /usr/sbin/useradd -g machines -c "%u machine account" -d /var/lib/samba -s /bin/false %u

# This allows Unix groups to be created on the domain controller via the SAMR
# RPC pipe. 
; add group script = /usr/sbin/addgroup --force-badname %g

############ Misc ############

# Using the following line enables you to customise your configuration
# on a per machine basis. The %m gets replaced with the netbios name
# of the machine that is connecting
;   include = /home/samba/etc/smb.conf.%m

# Some defaults for winbind (make sure you're not using the ranges
# for something else.)
;   idmap config * :              backend = tdb
;   idmap config * :              range   = 3000-7999
;   idmap config YOURDOMAINHERE : backend = tdb
;   idmap config YOURDOMAINHERE : range   = 100000-999999
;   template shell = /bin/bash

# Setup usershare options to enable non-root users to share folders
# with the net usershare command.

# Maximum number of usershare. 0 means that usershare is disabled.
#   usershare max shares = 100

# Allow users who've been granted usershare privileges to create
# public shares, not just authenticated ones
   usershare allow guests = yes

#======================= Share Definitions =======================

[homes]
   comment = Home Directories
   browseable = no

# By default, the home directories are exported read-only. Change the
# next parameter to 'no' if you want to be able to write to them.
   read only = yes

# File creation mask is set to 0700 for security reasons. If you want to
# create files with group=rw permissions, set next parameter to 0775.
   create mask = 0700

# Directory creation mask is set to 0700 for security reasons. If you want to
# create dirs. with group=rw permissions, set next parameter to 0775.
   directory mask = 0700

# By default, \\server\username shares can be connected to by anyone
# with access to the samba server.
# The following parameter makes sure that only "username" can connect
# to \\server\username
# This might need tweaking when using external authentication schemes
   valid users = %S

# Un-comment the following and create the netlogon directory for Domain Logons
# (you need to configure Samba to act as a domain controller too.)
;[netlogon]
;   comment = Network Logon Service
;   path = /home/samba/netlogon
;   guest ok = yes
;   read only = yes

# Un-comment the following and create the profiles directory to store
# users profiles (see the "logon path" option above)
# (you need to configure Samba to act as a domain controller too.)
# The path below should be writable by all users so that their
# profile directory may be created the first time they log on
[yourusername]
   comment = Users Files
   path = /home/yourusername
   available = yes
   valid users = yourusername
   read only = no
   browseable = yes
   public = yes
   writeable = yes

[printers]
   comment = All Printers
   browseable = no
   path = /var/spool/samba
   printable = yes
   guest ok = no
   read only = yes
   create mask = 0700

# Windows clients look for this share name as a source of downloadable
# printer drivers
[print$]
   comment = Printer Drivers
   path = /var/lib/samba/printers
   browseable = yes
   read only = yes
   guest ok = no
# Uncomment to allow remote administration of Windows print drivers.
# You may need to replace 'lpadmin' with the name of the group your
# admin users are members of.
# Please note that you also need to set appropriate Unix permissions
# to the drivers directory for these users to have write rights in it
;   write list = root, @lpadmin


Turns out in windows you need to switch on the features for samba nd in my case you need to mount the shares using the commandline:

net use L: \\IPADDRESS\MyShare /u:user passwd  

C++ Plotting utility for Linux - Harry Plotter

HarryPlotter

C/C++ Graphing Library Plotting realtime data in X windows with keymapping Simple X Windows Graphing:

1. Upto 3 traces
2. Easy to implement example provided
3. Additional Key thread feature for manipulating your data on the fly

g++ -I ./ -o keytest_ keytest.cc ./HarryPlotter.so -lpthread -lX11

Caution runfunc counter must begin at zero. Use sleep(1) within while loop for plotting time.

Useful for plotting any time series in C++ on linux.

Requirements X11-devel , Pthreads

Dont forget to include the *.h files for your plotting projects.

Thanks.

Download from github : 

https://github.com/housebyte/HarryPlotter

Sneak a peak @ Shepherds latest works DarkSide - Chapter 2 - The Watchers


Or Read Kromos now

Harry Plotter - Tcp Ip send recieve data Graphing

Harry Plotter is the upgraded graphing program that was originally used for my RBF project and has now been upgraded to using Tcp/Ip data streams.

If you have a server running your AI programs making use of a GPU for faster processing and you have like me a little netbook which has about 1 core the it is usefull to have a Harry Plotter.

The code to create a Harry Plotter needs a tidy but its really simple:

A class for creating an X11 window and Graph plotter and a class for the Tcp protocol. I will upload the code once it is tidy.

But here is an upload of the binary's. You need pthread lib, and X11 lib's and then it should run on Linux.

Here's a screen shot of Harry Plotter. If you get it working then email me for the source code.

Usage:
 Open a tcp port on your server and laptop using command:
sudo ufw allow from 'ipaddress' to any port 'port'

On your laptop / Receiver
./tcp_rcv_graph 'port'


On your Server / Transmitter
./tcp_snd 'ipaddress' 'port'

e.g Ipaddress is the address of the machine with the receiver.

Now you can send your data across your network or even across the internet.

Here is the Tcp/Ip Receiver Source:
tcp_rcv.cc

Here is the Tcp/Ip Sender Source:
tcp_snd.cc

Here are the Binarys for HarryPlotter:
tcp_rcv_graph        and      tcp_snd

Please Post a comment to get the Complete Source code for Harry Plotter.

Hope that was helpful.

Stream Amazon Prime over your Ubuntu Linux network

Wow so you've decided to stream your music now and MPD is useless
Amazon prime has all your albums and its affordable but so far you can only
listen via your browser or phone. You want it streamed throughout your
home network to every machine you own just like mpd.

Heres how to do it using vlc :
1. Open a browser on your Ubuntu box and start streaming music to your soundcard.

2. Issue this command on your Ubuntu box to find out what sound device to use:
pacmd list-sources | awk '/name:.+\.monitor/'

3.  Then add this information to the following cvlc command:

cvlc pulse://alsa_output.pci-0000_00_1b.0.analog-stereo.monitor --sout '#standard{access=http,mux=ogg,dst=you.ripa.dre.ss:8080}'

4. Open http://you.ripa.dre.ss:8080 on any of your other machines to stream
directly from your amazon prime music! Yeah.

And it works and now you can listen your Music just like with MPD.