I’m going to be a mentor again for Botball. This time I’m partnering with David, Kevin and Stephen and we are mentors for the middle school that David helped at last year. So, hopefully that means we will have more success than I had last year with Kramer middle school. This weekend is the intro/get… Continue reading Botball 2015
Author: drew
Datamining Forums
Would be interesting to compare writing styles, format etc of users on forums. Would be interesting if we could identify users with multiple accounts. Also, would be interesting to look at the change in style over time per person to see if it was hacked or something out of the ordinary. Plot emotions over time.… Continue reading Datamining Forums
JUnit and TestNG
I just got finished some code refactoring and a major rearchitecturing of bounties to be more ammenable to unit tests. Which I, for lack of time, unfortunately didn’t do. But, now that I have a bit of time and its for a class I’m going to start adding them. Junit has always been my goto… Continue reading JUnit and TestNG
Robins and cryptochrome
I was sitting in my chair and I saw a robin out the window and I wondered whether it could see me (as in how far can robin’s see). I of course googled it. But, I got sidetracked and found a Discovery article explaining that robins can see the earth’s EM field. According to the… Continue reading Robins and cryptochrome
Comparison Continued
I took a look at the R source code for the tukey test (HSD test) from the agricolae library http://cran.r-project.org/web/packages/agricolae/index.html. The interesting thing is that they purposefully call round: round(1-ptukey(abs(dif[k])*sqrt(2)/sdtdif,ntr,DFerror),6) Also, they assume lm or aov. So, we know that they don’t like big numbers. However, the nice thing is that the R file shows how… Continue reading Comparison Continued
New computer, is it worth it?
OR I could just ask for a computer with more ram then I could just use slow mathematica or R or whatever and not care. Of course it might not be that slow for R since its not that slow it just takes lots of ram. Which makes sense since it is very memory inefficient.… Continue reading New computer, is it worth it?
Handcoded Tukey
So, it seems that if I want a fast tukey test I need a fast ANOVA. Which seems to be where the bottle neck is. If I had time I would code ANOVA and borrow a Tukey implementation in C. I think that all of these programming languages are doing it wrong for what I… Continue reading Handcoded Tukey
large numbers
Well I’ve been looking into using R to calculate the tukey test. I’m doing this because I have a 10 files of 200,000 integers (all around 5000 and above). That is about 200MB per file. So, right now the ANOVA with a post hoc tukey test takes about 1hr to run in Mathematica. THIS IS… Continue reading large numbers
Touchscreen for touchpads
Would be neat to have a color touch screen that acted as the touchpad for a laptop. It could make gestures easier, allow you to maybe see your clipboard, show your password here instead of on your monitor (less easy for someone to observe this way). I’m sure there would be a lot of superficial… Continue reading Touchscreen for touchpads
Man vs Machine
Some people (not me) believe that we are the result of random chemical interactions. I wonder what the probability is that they assign to us existing. Because it has to be less than the probability of machine men existing. The existence of such machines would fit more into the notion of evolving randomly by fitness… Continue reading Man vs Machine