Kaleidoscope. A collection of random triangles with random colors and alpha value 0.5. The image was generated by a simple iPhone app — a test for an engine for repeatedly drawing into a view (useful for physics and math simulations as well as for generative art).
Source code (objective-C) at GitHub
zipTimer: an iPod/iPhone app for pacing piano practice, cooking, workouts, you name it.
Rosetta 5-20
Python code for the figure above is at github. Put in file rosetta5-20.py and run using
python3 rosetta5-20.py. An EPS file of the image will be saved in
rosetta5-20.eps. You can modify the code below to produce other figures. Try it!
zipTimer: an iPod/iPhone app for pacing piano practice, cooking, workouts, you name it.
Brownian Motion #2
This image was created using Processing on a Mac mini. The code is at github.
zipTimer: an iPod/iPhone app for pacing piano practice, cooking, workouts, you name it.
Brownian Motion
Brownian Motion-1800 steps
Processing code for producing these images.
zipTimer: an iPod/iPhone app for pacing piano practice, cooking, workouts, you name it.
Here is the Python code for a function which factors its argument into primes. It an be called at the commandnd
line:
With four lines of text you can add a command to do this:
% ev "sqrt(2)" 1.4142135623730951
Below is the code — just put it in your personal bin or script directory:
#! /usr/bin/env python3 import sys from math import * print(eval(sys.argv[1]))
This is useful for quick one-line computations. For more, it’s of course better to jump into the Python interpreter — or sage. If you have any Python functions that you want to use in this way, just add an import statement to the above. For example, in my PYTHONPATH directory, I have a file mathtools.py which defines a function factor.
Thus I can do this:
% ev "factor(123456789)" [3, 3, 3607, 3803]
provided that I add the line
from mathtools import *
to the code for ev.
zipTimer: an iPod/iPhone app for pacing piano practice, cooking, workouts, you name it.
Below is Python code to send an appropriately formatted string representing the date and time over the serial port (USB) to an Arduino board. I use this for a temperature monitor.
zipTimer: an iPod/iPhone app for pacing piano practice, cooking, workouts, you name it.
"""
File: pst.py (Port Send Time)
Purpose: Set the time on the arduino board
for use with the Time library found
at http://playground.arduino.cc/Code/time
Usage: % python pst.py
Effect: Send message like "T1359713903" over the serial port
That is the time string for Fri Feb 1 10:18:23 EST 2013
Config: Set the variable "time_zone_offset" for the offset to GMT. The
value -5 works for US Eastern Standard Time
Set the variable port to the usb port used by your Arduino
board. In Arduino IDE, go to Tools > Serial Port and note
which port is checked.
Ref: http://www.moosechips.com/2010/07/python-subprocess-module-examples/
Author: J. Carlson, Feb 2, 2013
"""
import os, subprocess
# Settings
time_zone_offset = -5
port = "/dev/tty.usbmodemfa131"
# Put stdout into pipe
proc = subprocess.Popen("date +%s", shell=True, stdout=subprocess.PIPE)
return_code = proc.wait()
# Read from pipe
for line in proc.stdout:
time = int(line.rstrip())
# Output to terminal and port
print
os.system("date")
time += 60*60*time_zone_offset
print "Time:", time
cmd = "echo T" + str(time) + " > " + port
print "Cmd:", cmd
print
os.system(cmd)
zipTimer
Dear Friends,
I’ve posted a little timer app on the App Store which I use for cooking and practicing the piano. Simple, with large, easily readable display. You might find it useful.
Works on iPhone and iPod, but requires iOS 5.
Other, more interesting apps are in the pipeline. Stay tuned!
Link to OffCenterApps.com
Circle and Square 