gugagore

20 ms·

241.
by gugagore 5y ago
from the title, I expected this to be a standard for video signals (like NTSC), and was excited to learn about a video standard I had never heard of.
242.
by gugagore 5y ago
Ah, okay. Sure. And PSD matrix A is diagonalizeable with orthogonal matrices i.e. A = Q^T * D * Q The ellipsoid visualization you meant is insensitive to the Q term (any rotation of a sphere is the same sphere), but not to the Q^T te
243.
by gugagore 5y ago
> I actually had the latter one in mind: The one given by {A x | x^T x = 1}. I am near certain that you did not mean this. > When the semi-axes are parallel to the coordinate axes, the matrix is diagonal. Let D = the matrix | 2
244.
by gugagore 5y ago
One possible perspective: thinking of images as a vector space, and thinking of image operations like blurring, sharpening, and even any spatial transformation as linear operators (representable as matrices). This perspective is most straig
245.
by gugagore 5y ago
> As for the July record, OK - but also some points in time have to be the record. Yes, if you have a sequence of comparable values that are not all identical, one of those values is the maximum. If you keep hitting maxima at a rate that
246.
by gugagore 5y ago
> a positive-definite symmetric matrix can be visualized as an ellipse. It is clear that you mean the ellipsoid as a set of points {x | x^T * A * x = 1} (or some other constant). There is another way in which all square matrices define a
247.
by gugagore 5y ago
I more or less had understood that what was meant by "zero was invented" is zero as used in a positional number system. In other words, the digit zero, not the quantity zero.
248.
by gugagore 5y ago
Do you mean that they simply amplify the difference between the two signals?
249.
by gugagore 5y ago
Here are a variety of techniques: https://en.m.wikipedia.org/wiki/Analog_delay_line I think a better word than "physical" domain is "mechanical" domain. Mechanical waves propagate much more slowly
250.
by gugagore 5y ago
If I may elaborate, the comparison to IEEE floats is apt because they addition is not associative there either: julia> (1e16 + 1) + 1 1.0e16 julia> 1e16 + (1 + 1) 1.0000000000000002e16 I think the fundamental issue with dates, however
251.
by gugagore 5y ago
I think this is a real conflict. In my opinion (not just mine), the only reason to write type constraints on a method definition in Julia is to control dispatch. Adding types to method arguments for the purposes of documentation is counte
252.
by gugagore 5y ago
It is a lot safer than `from pkgfoo import *` because you get a warning if there is a collision. $ julia --banner=no julia> module A export foo foo(x) = x end Main.A julia> module B e
253.
by gugagore 5y ago
> In programming I tend to think the whole computer and its OS and so on as the programming tool. My impression is that for Julia folks Julia is something totally separate from anything else in the computer. But I don't understand w
254.
by gugagore 5y ago
this would be beneficial not just for stacktraces but for printing values, too.
255.
by gugagore 5y ago
"Geopolitics is messy" is a wonderful way to justify any atrocity. Where is the accountability?
256.
by gugagore 5y ago
Bad analogy for countless reasons, including an absences of version control when a commit is to blow something up.
257.
by gugagore 5y ago
That is a great world. But considering that we still do not really know how to write e.g. generic code that operates on both immutable and mutable arrays, I think Julia is not there yet. The other big thing missing in Julia that is IMO impo
258.
by gugagore 5y ago
I'm curious. Do you think that if your grandmother had more wealth, then she'd be able to walk with less pain? Or is it a case where the treatment/cure might be worse than the disease? It's very immoral to allow (force)
259.
by gugagore 5y ago
> we want to work less but expect to consume the same or more I think it feels clear to many people that our consumption habits are unsustainable, regardless of how much we work. And I agree, "consumption" is where the rubber
260.
by gugagore 5y ago
to make a related point, I think that notions of programming (e.g. scope, types, awareness of Hungarian notation) should influence how we write math more. I do not think the goal can be to make code look like "math" completely bec
261.
by gugagore 5y ago
I do think Julia is uniquely poised to provide a new kind of trade-off between concision, performance, understandability, etc. because of multiple dispatch, and great syntax for things like broadcasting. Sometimes a practical algorithm does
262.
by gugagore 5y ago
I personally use Unicode liberally in my Julia code. Let me say there is a third alternative: (mean, cov) (except you'll shadow some functions...).
263.
by gugagore 5y ago
This is incredibly myopic. The subject at hand will certainly have sweeping effects for generations to come. It would require some changes to the way things get done. Personally I think the changes are worth it. But surely you don't ac
264.
by gugagore 5y ago
Or even the transition to the 5-say work week with a weekend, which as I understand it is an outcome of labor movements.
265.
by gugagore 5y ago
It's hard to compare the meaning of a wage change across two countries with what I understand to be very different social programs. One of the biggest reasons that I would like to be wealthy is so that if I or someone I love gets sick,
266.
by gugagore 5y ago
What part are you both talking about? Surely you're talking past each other to some degree.
267.
by gugagore 5y ago
It's awkward to abbreviate "in polynomial time" as "in P". P is a set of (decision) problems. We don't know that 3-SAT is in P. We don't know that it's not. To say that a solver is not in P is a type
268.
by gugagore 5y ago
I'm not sure about "very particular processor", but the magic number does rely on IEEE floats.
269.
by gugagore 5y ago
What do you mean by "bad"? If you're asking why it makes sense to structure society with an eye toward avoiding disparity, then it's enough to just observe empirically that people have an aversion to unfair treatment. An
270.
by gugagore 5y ago
What do you mean "add a generator for it"? Do you mean something like a templating for source code, like the C pre-processor? I think there is a pro and a con to that approach. The pro is that there is a meaningful and familiar in

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