petters

75 ms·

901.
by petters 10y ago
It's not clear what the author means here. This is not a very mathematical article. (Nit: d is a distribution so it can not always return 0 -- it has to sum to 1. But your point stands.)
902.
by petters 10y ago
Reran the std::sort vs. qsort benchmark: Visual Studio 2015: 1.79x WSL gcc 6.2: 1.92x WSL clang 3.8.0: 2.08x Ubuntu 16.10 VM gcc 6.2: 1.68x Ubuntu 16.10 VM clang 3.8.1: 1.89x All in favor of std::sort.
903.
by petters 10y ago
std::sort was about twice as fast (!!) last time I ran my benchmark. I don't think std::sort would be slower than a macro based liberty. Obviously, you can reserve memory in a vector in the beginning. > If an algorithm is time-crit
904.
by petters 10y ago
I suppose that you could just use C with std::vector and std::unique_ptr from C++, and you’d be much better off. The you could still write "C" code but not worry about memory leaks. Of course, you also need std::sort because it is
905.
by petters 10y ago
Some numerically unstable problem require a lot of precision of solve successfully. Similarily, well-behaved problems can be solve with 32-bit floats, but many require 64-bit floats.
906.
by petters 10y ago
Tao follows this advice well himself. He seems to be working on the millennium problem of Navier-Stokes, but works on many other things simultaneously and published partial results.
907.
by petters 10y ago
Latex typography looks vastly better than Word or LibreOffice, even when the font, margins and size are fixed.
908.
by petters 10y ago
Yes, but the experience isn't great IMO.
909.
by petters 10y ago
Nice visualization! You should add L-BFGS, in my experience a very efficient and versatile algorithm. It is a jewel of optimization.
910.
by petters 10y ago
Because it is much easier than performing complicated modifications while the site is running. For example, at Google "down for maintenance" is not on the table. That can in some cases lead to lots of extra work or time, e.g. dual
911.
by petters 10y ago
Just tried this and I really like it. I hope this is here to stay. The Dply button could be huge!
912.
by petters 10y ago
You are correct.
913.
by petters 10y ago
One common mistake is to take the average of run times (for identical runs). I think taking the minimum should be better under reasonable assumptions. Edit: I now see that this was mentioned elsewhere here. Good!
914.
by petters 10y ago
Completely agree. The first issue in the report is about reading lines from a file. Those kinds of bugs can and should be eliminated for good.
915.
by petters 10y ago
Go is nice, but not a substitute for C++. https://github.com/nieksand/sortgenerics/blob/master/README....
916.
by petters 10y ago
> But the recoded E. coli will be unable to grow unless fed one of those artificial amino acids, so it shouldn’t spread in the wild. “Biocontainment is our number one priority,” says Church. Clever, but still sounds a bit dangerous. What
917.
Synthetic supermicrobe will be resistant to all known viruses(newscientist.com)
1 points by petters 10y ago|1 comments
918.
by petters 10y ago
If this holds up I am prepared to believe in almost anything – like the universe being a simulation and this is a deterministic round-off error. Conservation of momentum is pretty fundamental.
919.
by petters 10y ago
Compiling C++ is usually pretty slow. Go and C would be significantly faster.
920.
by petters 10y ago
These days, I mostly use those tools for plotting and simple exploratory data analysis. I also do some modeling for integer programming.
921.
by petters 10y ago
I suppose Octave's niche is people who have been using Matlab, change employer, and no longer have access. Python + numpy + matplotlib + jupyter notebooks are superior to Matlab, IMO. And I used to be really into Matlab.
922.
by petters 10y ago
I have a Phd in optimization and I still think Cplex and Gurobi seem magical. The devil is in the details. Open source solvers are comparatively not very good.
923.
by petters 10y ago
Agreed that it seems magical. This is one of the areas where the open-source tools are way behind commercial solvers. Cplex and Gurobi are really impressive pieces of software.
924.
by petters 10y ago
Yes, it definitely gives the code a retro feel. My first impression is that I like it.
925.
by petters 10y ago
The monospace font looks interesting. Fixed-width serif fonts are not that common. But creating fonts for Go? That sounds like a solution in search of a problem.
926.
by petters 10y ago
I was supposed to draw "phone," the computer guessed "telephone," but I still failed. :-) Pretty awesome still.
927.
by petters 10y ago
No The interview training at my company mentioned age as one of many things we were forbidden to ask about. SSN? It was so obviously disallowed it was never mentioned.
928.
by petters 10y ago
It is not really meaningful to talk about a single instance being verifiable in polynomial time.
929.
by petters 10y ago
It would require impressive evidence in order to disprove conservation of momentum.
930.
by petters 10y ago
I answered no to essentially all questions. I consider dogs and rabbits, for example, to be intelligent life. From observing the earth and our surroundings, there is no reason to assume that higher intelligence would automatically arise. Ho

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