118 reputation
5
bio website
location Worcester, MA
age 28
visits member for 3 years, 2 months
seen Nov 4 '13 at 14:55

bioinformatics here...schooled in molecular biology and biochemistry, work with Perl, R, Java daily. Hobby languages: Ruby, C, shell scripting. Next goals: Take discrete mathematics to see what I have been missing. Haskell someday?


Sep
24
awarded  Autobiographer
May
16
comment $u$~$N(0,A)$ and z$|u$~$N(u,1)$ how to show that $u|z$~$N(Bz,B)$ where $B=A/(A+1)$?
Hello, I am interested in solving the same problem, is there a good guide I can use to better understand the manipulation of the u ~ N(0,A) type objects? Thank you
Jul
4
revised Multivariate Hypergeometric Distribution Questions
added working solution
Jul
4
asked Multivariate Hypergeometric Distribution Questions
Oct
25
awarded  Editor
Oct
25
revised Simple probability for test studying strategy
added 241 characters in body
Oct
25
comment Simple probability for test studying strategy
@Joriki, you are correct. This is the information as I have found.
Oct
25
asked Simple probability for test studying strategy
Oct
13
awarded  Scholar
Oct
13
accepted Probability of occurrence of 4 letters in a sample of text
Sep
28
awarded  Supporter
Sep
24
comment Probability of occurrence of 4 letters in a sample of text
@mixedmath, yes you are correct. I am working the problem now as a didactic exercise then will get to that. If you have a solution with P(x) probabilities, please share!
Sep
24
awarded  Student
Sep
24
comment Probability of occurrence of 4 letters in a sample of text
so what should the equation for B(20) be? I'm a little confused whether my math, or calculation is off.
Sep
24
comment Probability of occurrence of 4 letters in a sample of text
just to make sure i'm on the right track here, plugging in values would make B(n) = ( ( 23 * (expt 4 19)) + ( 4 * (expt 22 19))) = 128259908852079784775122944
Sep
24
comment Probability of occurrence of 4 letters in a sample of text
thank you! I'll run this through Haskell to avoid floating point errors!
Sep
24
asked Probability of occurrence of 4 letters in a sample of text