ulamspiral.blogspot.com
Ulam Spirals: October 2008
http://ulamspiral.blogspot.com/2008_10_01_archive.html
The images you see on this blog are output from various Ulam spiral. Friday, October 31, 2008. Some tinkering with PIL and Google Maps produced these cartographic miscarriages:. And yes, we're still doing this with basic Ulam spiral algorithm. Round( pow(sqrt(pInt)/e, 1.2) )%3= 0. Round( pow(sqrt(pInt)/e, 1.2) )%5= 0. Round( pInt/e )%3= 0. Borrowing from Myka's number testing algorithm, I've introduced the x and y coordinates into the mix. The test. Appears in Myka's Square series. Round( (pi*pX)*(pY)*(d...
rdataviz.wordpress.com
Getting data from an image (introductory post) | Data visualization (in R)
https://rdataviz.wordpress.com/2010/03/05/getting-data-from-an-image-introductory-post
Skip to search - Accesskey = s. Data visualization (in R). Getting data from an image (introductory post). By Timothée on March 5, 2010. This blog will be dedicated to data visualization in R. Why? I have recently been using programs such as GraphClick. To gather data from graphs, in order to include them in future analyses (in R). While both programs are truly excellent and highly intuitive (with a special mention to GraphClick), I found myself wondering if it was not possible to digitize a plot dir...
ulamspiral.blogspot.com
Ulam Spirals: June 2008
http://ulamspiral.blogspot.com/2008_06_01_archive.html
The images you see on this blog are output from various Ulam spiral. Wednesday, June 18, 2008. The Strangest, Most Beautiful Spiral. When my spiral generator output the above image for the first time, my jaw dropped. I had previously generated some interesting spiral images using triangular and square numbers, images that others have already generated elsewhere. But I have not yet seen anything as complex or intricate as this image, at least using the Ulam spiral algorithm. Now I'm trying to fine tune th...
ulamspiral.blogspot.com
Ulam Spirals: Marilyn Hex
http://ulamspiral.blogspot.com/2009/03/marilyn-hex.html
The images you see on this blog are output from various Ulam spiral. Thursday, March 12, 2009. Labels: e ulam spiral mathematical constant marilyn monroe pop art. Subscribe to: Post Comments (Atom). My colleague David Myka has greatly advanced the art and science of Ulam spiral generation. Check out his amazing images: http:/ myka-x.blogspot.com/. Arlo Emerson's Portfolio: The Damage Report.
ulamspiral.blogspot.com
Ulam Spirals: Ulam Spirals Using Arduino and LED Displays
http://ulamspiral.blogspot.com/2014/07/ulam-spirals-using-arduino-and-led.html
The images you see on this blog are output from various Ulam spiral. Wednesday, July 30, 2014. Ulam Spirals Using Arduino and LED Displays. Here's an animated gif of my Arduino-powered 32x16 LED screen. I wired this up using the Adafruit tutorial at https:/ learn.adafruit.com/32x16-32x32-rgb-led-matrix/wiring-the-16x32-matrix. PiCounter = .001;. GlobalCounter = 1;. Int posX = 15;. Int posY = 7;. Int numberCounter = 1;. Int spacer = 1;. Int legLength = 0;. Establish the first dot. For (int i=1;i. Matrix&#...
ulamspiral.blogspot.com
Ulam Spirals: Random Grids
http://ulamspiral.blogspot.com/2009/04/random-grids.html
The images you see on this blog are output from various Ulam spiral. Thursday, April 2, 2009. I was bored today so I modified the base routine to select a cardinal direction randomly. These images are all built pulling from a list of 1,296 possible 2x2 pixel images. The original image is. Labels: ulam spiral random grid. Subscribe to: Post Comments (Atom). Arlo Emerson's Portfolio: The Damage Report.
ulamspiral.blogspot.com
Ulam Spirals: Displaying Ulam Spirals with Arduino Yun and 128x160 Display
http://ulamspiral.blogspot.com/2014/07/displaying-ulam-spirals-with-arduino.html
The images you see on this blog are output from various Ulam spiral. Thursday, July 31, 2014. Displaying Ulam Spirals with Arduino Yun and 128x160 Display. I just set up a small 128x160 LCD display with an Arduino Yun running full animations of the Ulam Spiral. Here's the adafruit tutorial I used to get going: http:/ www.adafruit.com/products/358. Here's the code from my sketch:. Spiral algo written by arlo emerson arloemerson@gmail.com. Adapted from the ulam spiral aglorithm. If defined( SAM3X8E ).
ulamspiral.blogspot.com
Ulam Spirals: July 2008
http://ulamspiral.blogspot.com/2008_07_01_archive.html
The images you see on this blog are output from various Ulam spiral. Sunday, July 13, 2008. The following is the printable version sans legend:. A more comprehensive table with numbers listed to 17991 can be found at thedamagereport.com. Maybe you will be "the one" to find the pattern in the primes. Labels: base 9 root spiral ulam interval prime. Thursday, July 3, 2008. Prime Spiral - Intervals of 18. The number following 19 is 37. Adding the digits produces 3 7=10. It is more than a simple grouping of n...
ulamspiral.blogspot.com
Ulam Spirals: Spiral Video Series
http://ulamspiral.blogspot.com/2009/04/video-of-spiral-series.html
The images you see on this blog are output from various Ulam spiral. Monday, April 6, 2009. Using smplayer/mencoder to convert PNG output to video. Formula and other control info is automatically inserted into the beginning of the video. This set is using a 2x2 pixel plotted out using the Ulam spiral "RULD" method. Pixel is black or red if the pixel number. Passes the following test (e.g.):. If round( (pInt)*pi)*pow(sqrt(pInt)/pi ( multiplier/9), (1.2) )%2= 0:. Labels: video ulam spiral modulo.