Comments on: Graphical removal of data points http://blogs.mathworks.com/pick/2007/02/07/graphical-removal-of-data-points/ <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 Hull http://blogs.mathworks.com/pick/2007/02/07/graphical-removal-of-data-points/#comment-1403 Doug Hull Fri, 20 Apr 2007 14:12:11 +0000 http://blogs.mathworks.com/pick/?p=1928#comment-1403 Rommel, You are correct; this is not a true "lottery" simulation. It is essentially generating a vector of six uniformly distributed numbers ([0 1]) and then scaling them to [0 50] and finally rounding them up to be only integers ([1 50]). The essentially means there is 'replacement' between picks. It would be easy enough to use the "unique" function in MATLAB to ensure you had unique values, or you could use "randperm" to get a random permutation of the numbers and just select the first few. The number after 'state' is setting up the state of the random number generator. This is much like setting the seed. I did that because I was specifically looking to generate "4 8 15 16 23 42" as my lottery picks. Thanks for the interest, Doug Rommel,

You are correct; this is not a true “lottery” simulation. It is essentially generating a vector of six uniformly distributed numbers ([0 1]) and then scaling them to [0 50] and finally rounding them up to be only integers ([1 50]). The essentially means there is ‘replacement’ between picks. It would be easy enough to use the “unique” function in MATLAB to ensure you had unique values, or you could use “randperm” to get a random permutation of the numbers and just select the first few.

The number after ‘state’ is setting up the state of the random number generator. This is much like setting the seed. I did that because I was specifically looking to generate “4 8 15 16 23 42″ as my lottery picks.

Thanks for the interest,
Doug

]]> By: Rommel http://blogs.mathworks.com/pick/2007/02/07/graphical-removal-of-data-points/#comment-1402 Rommel Fri, 20 Apr 2007 06:47:51 +0000 http://blogs.mathworks.com/pick/?p=1928#comment-1402 Hi Doug, I saw this post because I was looking for a similar function that would generate random numbers and at the same time whole numbers. I am a newbie in Matlab and I checked out your statement and ran through a number of iterations and on the sixth iteration there are two numbers that are the same. This will be unlikely for lottery picks because it can only pick the numbers that are still remaining not the ones that have already been picked. I would also like to ask what does the whole number after 'state' do for the rand function. Hi Doug,
I saw this post because I was looking for a similar function that would generate random numbers and at the same time whole numbers. I am a newbie in Matlab and I checked out your statement and ran through a number of iterations and on the sixth iteration there are two numbers that are the same. This will be unlikely for lottery picks because it can only pick the numbers that are still remaining not the ones that have already been picked. I would also like to ask what does the whole number after ‘state’ do for the rand function.

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