New user to GIS and to QGis but experienced data user.  I have shapefiles for a state legislative districts.  I have a set of individual voter records that I have geocoded.  What I'd like to do is create a map where the color wheel displays the number of voters per legislative district.  I'm not quite sure how I'll do the join (or even if I should use a join).  I know this is probably basic and I'm asking the question wrong but guidance appreciated.
I have a layer of georeferenced points, and a layer of vectorized borders. Is there a way I can use QGIS to calculate how many points fall within each area of the borders layer?
Minimum safe spacing between lava and flamable materials? It seems that containing lava in solid glass, stone and iron blocks may not be sufficient to prevent wool from burning, even if the lava is completely encased.         After some delay, it seems that fire will jump onto the wool above the iron.   Are solid blocks more effective than airspace, or not? If so, Does it matter whether the corner block is filled in? What are the exact rules on distance that I need, and how can I prevent flammable blocks from being eliminated by nearby lava? Bonus: Does a flowing lava block behave differently than a lava source block when it comes to fire creation? Are there well known HTTP-only sites? Captive WIFI portals suck.  So often when I open in a browser (Desktop Chrome or Mobile Chrome) a HTTP site, I get the captive portal, but with auto-completion and so quickly I connect again to WIFI.  The problem is that after the captive portal redirects, I'll have also a HTTPS redirect and Chrome remember the certificate and to use only HTTPS.  So I cannot use the same site twice (in a session).  A well-known public HTTP only site will resolve this.  Well-known sites usually work, causing some less debugging of the WIFI connection. Simulating a Brownian Excursion using a Brownian Bridge? What happens if I do not honor a futures contract? I have little knowledge about futures contracts. The recent negative price of crude oil spurred my curiosity about this stuff.   I read this post about .  According to this post, when I buy a futures contract, I enter into a contractual agreement to buy some commodity on some future date, and I only need to pay a 2% initial margin.   Suppose the price of the commodity does not fluctuate but I change my mind and decide not to buy the commodity at maturity. What punishment could be exerted on me?   I do not want the 2% initial margin back because that is a little money compared to the real value of the commodity. If there is no extra penalty, it would be unfair for the seller — imagine the seller transports 1000 barrels of crude oil to your front door and you say "I do not need it any more, please take it away, thank you!"  Update: I did more research about this and have more questions.  If I buy a futures contract at $10 and the price of the contract drops to -$37 at the last trading day, at which price should I buy the commodity at the delivery day, $10 or -$37?   There seems not just one contract I enter into when I buy a futures contract: the original futures contract between me and the seller of the commodity(or the exchange?), the contract between me and my brokerage, the contract between the brokerage and the exchange. I'm not clear about the exact entities of each contract and the obligations involved in each contract. The contracts seem contradictory with each other, e.g., my brokerage may forcefully sell my futures contract if my account balance is not enough, which will prevent me from fulfilling the obligations in the futures contract, i.e., receiving the commodity on future date.  If I(or an institutional trader) trade directly (not via a brokerage) with an exchange(does CME accept individual traders?), does the exchange have the rights to forcefully sell my contracts at the last trading day at any price or close my position at the settlement price(say -$37)? If the exchange does so thus letting me own $5,000M to it, is it more justice for me to sue the exchange rather than let the exchange sue me? If I could hold the position, the loss caused by my not executing the delivery/receipt of the commodity may be less than $5,000M. Of course, the loss will be determined by the court, not by the exchange according to the settlement price formed by itself or a few possible conspirators. Mapping/texturing inside of a box I'm trying to replace the content of a box in a video, I have used the tracking system to match the movement of the video box with the interior of the one rendered in Blender, but I am running trough what seems a simple thing but I can't manage to get done.   I want the outside faces of the box to be invisible while hiding the inside of the box where the front wall of the box hides it, and the inside of the box to be rendered where visible. To do that I thought it would be as simple as making the face normals point to the inside of the box and giving a color only to the faces where normals are pointing to. But I can't manage to get that, am I going the wrong road? How can I achieve my goal? is there a way to add hyperlinks in a Illustrator document? I am creating a CV in Illustrator and exporting it to a PDF. I just read an article which stated that it is a good idea that we use hyperlinks in the CV so that the employer can just click and not have to copy the address. I like this idea, but I don't know how to add a hyperlink to text in Illustrator. Is it possible? How does an arcane focus work with an Eldritch Knight? My PC is an Eldritch Knight. I was wondering what is an Arcane Focus? Do I need to have it in my hand? If I get the War Caster Feat does my arcane focus become obsolete? Use of "would" for subjunctive phrases This has been bugging me for some time; I tried to look for previous questions here but my language tools may not be sharp enough to phrase my query correctly so please forgive me if this has already been posted here.  Speakers of English as a foreign language tend to incorrectly use the word "would" when using some particular subjunctive constructs. Here is  (this time presumably by a native English speaker):     If that would happen, you won’t be alone.     (One correct version being "If that happens, you won't be alone".) I have detected this in speakers of a number of languages so I feel this is more likely to be a feature of the English language itself than a carry-over from their native language.  I have a faint intuition that this is because , and it certainly doesn't help that , but I can neither make that precise nor even really phrase a concrete question. Can someone shed some light on this?    Edit: just to provide some real-world examples of what I mean, here is one example taken from :     Publish or Perish is designed to empower individual academics to present their case for research impact to its best advantage. We would be concerned if it would be used for academic staff evaluation purposes in a mechanistic way.   This is obviously ungrammatical (to me), but I'm not sure how to characterize the mistake, or what the likely causes are (e.g. whether it follows from analogous constructions in other languages). How do I know the script file name in a Bash script? How can I determine the name of the Bash script file inside the script itself?  Like if my script is in file runme.sh, then how would I make it to display "You are running runme.sh" message without hardcoding that? Colorimetry is not the same Python Argument Binders How can I bind arguments to a Python method to store a nullary functor for later invocation?  Similar to C++'s boost::bind.  For example:  def add(x, y):     return x + y  add_5 = magic_function(add, 5) assert add_5(3) == 8 $ versus jQuery Passive voice phrasing of "The bottle contains two liters" if G is generated by {a,b} and ab=ba, then prove G is Abelian if G is generated by {a,b} and ab=ba, then prove G is Abelian  All elements of G will be of the form $a^kb^j,\,\, k,j \in \mathbb{Z}^+$   so I need to get $a^kb^j = b^ja^k$ So, the spiffy new wi-fi thermostats want power on the C wire from thermostat, but the old thermostat doesn't have a C wire at it.  What's the easiest way to add the C wire/24 volt to the thermostat location? How to connect to my web server? Should I mention about my governmental-funded PhD scholarship which I don't want to use Does anyone know what the Inverse Cumulative Distribution Function of Normal Distribution is? Does it have a closed form expression? I did not find any good answer using Google. What is the expected value of the number of die rolls necessary to get a specific number? Given a discrete random number generator, such as a six-sided die, what is the expected value of the number of rolls necessary to roll a specific number (e.g. a six)?   I think the result should be given by E$\langle$rolls$\rangle$ = $\frac{1}{6}\sum_{n=0}^\infty{(\frac{5}{6})^n(n+1)}$, but I don't know how to calculate the convergence of that sum.  Also, how do I calculate the variance? How can I find $f(0)$, $f'(0)$, and $f'(x)$ given that  $f(x+y)=f(x)+f(y)+x^2y+xy^2$  and  $\lim_{x\to0}\frac{f(x)}{x}=1$.