Comments on: Puzzler: Data exploration solution http://blogs.mathworks.com/pick/2008/07/03/puzzler-data-exploration-solution/ <a href="http://www.mathworks.com/matlabcentral/fileexchange/loadAuthor.do?objectId=1093599&objectType=author">Brett</a> & <a href="http://www.mathworks.com/matlabcentral/fileexchange/loadAuthor.do?objectId=1094142&objectType=author">Jiro</a> share favorite user-contributed submissions from the File Exchange. Fri, 10 Feb 2012 16:12:39 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Doug http://blogs.mathworks.com/pick/2008/07/03/puzzler-data-exploration-solution/#comment-12042 Doug Mon, 07 Jul 2008 12:58:36 +0000 http://blogs.mathworks.com/pick/2008/07/03/puzzler-data-exploration-solution/#comment-12042 Seems to be a lot of interest in how I generated this puzzle. It was just kind of throw away code. Here was the basic procedure: Get the original image from logo.m, edit in pain to add the messages. Import into MATLAB and chop to convenient prime width and heights. Save images to disk. Read in first image, make into a column. Read in second image, rot90, make into a column, add a sin wave so everyone knows it is not an accident. Divide by 1000 to make it a decimal. Add to the original. Test the solution to make sure I did this all right. This is pretty much all there was. This idea is from steganography: http://en.wikipedia.org/wiki/Steganography The Easter Egg in IMAGE uses this too: http://blogs.mathworks.com/steve/2006/10/17/the-story-behind-the-matlab-default-image/ Glad you all enjoyed, I will have to make some more puzzles. Doug Seems to be a lot of interest in how I generated this puzzle. It was just kind of throw away code. Here was the basic procedure:

Get the original image from logo.m, edit in pain to add the messages.

Import into MATLAB and chop to convenient prime width and heights. Save images to disk.

Read in first image, make into a column.
Read in second image, rot90, make into a column, add a sin wave so everyone knows it is not an accident. Divide by 1000 to make it a decimal. Add to the original.

Test the solution to make sure I did this all right. This is pretty much all there was.

This idea is from steganography:

http://en.wikipedia.org/wiki/Steganography

The Easter Egg in IMAGE uses this too:
http://blogs.mathworks.com/steve/2006/10/17/the-story-behind-the-matlab-default-image/

Glad you all enjoyed, I will have to make some more puzzles.

Doug

]]> By: Rajanikanth Jammalamadaka http://blogs.mathworks.com/pick/2008/07/03/puzzler-data-exploration-solution/#comment-12022 Rajanikanth Jammalamadaka Fri, 04 Jul 2008 04:58:35 +0000 http://blogs.mathworks.com/pick/2008/07/03/puzzler-data-exploration-solution/#comment-12022 Even I could get only to the first image...Nice Puzzle. Even I could get only to the first image…Nice Puzzle.

]]> By: Harsha http://blogs.mathworks.com/pick/2008/07/03/puzzler-data-exploration-solution/#comment-12020 Harsha Thu, 03 Jul 2008 18:38:26 +0000 http://blogs.mathworks.com/pick/2008/07/03/puzzler-data-exploration-solution/#comment-12020 As farmboy and DanK even I was trying to find RGB values after the first image.....good one though. I would appreciate Doug, if he could explain how he made this vector. As farmboy and DanK even I was trying to find RGB values after the first image…..good one though. I would appreciate Doug, if he could explain how he made this vector.

]]> By: christian http://blogs.mathworks.com/pick/2008/07/03/puzzler-data-exploration-solution/#comment-12019 christian Thu, 03 Jul 2008 16:49:28 +0000 http://blogs.mathworks.com/pick/2008/07/03/puzzler-data-exploration-solution/#comment-12019 ok, you win! i find the image, but never thought the show in this post. Good game and post. thanks ok, you win! i find the image, but never thought the show in this post. Good game and post. thanks

]]> By: DanK http://blogs.mathworks.com/pick/2008/07/03/puzzler-data-exploration-solution/#comment-12011 DanK Thu, 03 Jul 2008 14:49:49 +0000 http://blogs.mathworks.com/pick/2008/07/03/puzzler-data-exploration-solution/#comment-12011 I was also looking for RGB after I found the first image. The other thing I noticed was that if you looked at 1/e it tended to be distributed in the 1 to 256 range (with just a couple of exceptions, which made me think the fractional portions were supposed to be inverted. Oh well. Overthought that one. Dan I was also looking for RGB after I found the first image. The other thing I noticed was that if you looked at 1/e it tended to be distributed in the 1 to 256 range (with just a couple of exceptions, which made me think the fractional portions were supposed to be inverted. Oh well. Overthought that one.

Dan

]]> By: farmboy http://blogs.mathworks.com/pick/2008/07/03/puzzler-data-exploration-solution/#comment-12010 farmboy Thu, 03 Jul 2008 14:36:52 +0000 http://blogs.mathworks.com/pick/2008/07/03/puzzler-data-exploration-solution/#comment-12010 That was it? I was trying to find RGB values and could not find the blue value.... Wow, I guess I was looking to hard. Corey That was it? I was trying to find RGB values and could not find the blue value….

Wow, I guess I was looking to hard.

Corey

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