I'm fairly familiar with using Tikz. I've used it to make simple logos before. Now, I'd like to create this diagram, which is a little more complicated:    Does anyone have any advice on what the best way to do this would be?  I'm aware that it's very easy to use the image file in my output (\includegraphics). However, I'd like to make it in Tikz if possible, for infinite scalability.  BTW, the blue is #080f6a.
Is it feasible to convert math in a picture, say written by hand, into LaTeX?   For example, I'd deem it faster to write down (de novo)  a 10 x 10 matrix with long, complex entries, rather than typing it in LaTeX or MathType. If I then take a picture or scan my writing, how can it be rendered or transformed into LaTeX?
Can you use external money to pay trading commissions in tax-free and tax-deferred accounts? Find the eigenvector associated with the smallest eigenvalue, not smallest in magnitude I want to be able to lock my translation/scale operations to two axes at a time, say xy, xz or yz. It currently takes two operations (one for each axis).  Example, say for a cylinder, I would like to reduce the radius. I currently have to scale on the x axis first, then on the y axis, or I have to manually input the scale values in the object properties panel.  This option is easily accessible in 3dsmax via the axis constraints command bar. Or I can click the intersecting area between the 3d manipulator of the axes in question and move in that plane. Can I charge computers by inducing 5-volt into their USB connectors? Is this possible? I noticed that when my EeePC 900 is off but plugged in charger, there is power coming out of the USB port. Can this be a sustainable way of charging a PC, or a flaw in design? How do I make windows save their position on screen after re-attaching a display? Using the itemize environment inside a caption The following code does not compile. However, if I remove the itemize environment it does. I googled for this problem, and found suggestions that using the caption package would solve the problem, though I did not find any clear description of why the problem occurred in the first place. See for example    I'm using Debian squeeze with TeX Live 2009-11. The included version of caption has   \ProvidesPackage{caption}[2009/10/09 v3.1k Customizing captions (AR)]   I also tried downloading and using the caption package from     but this doesn't change anything. I put the sty files in my current directory. I assume that overrides the system files. This one corresponds to  \ProvidesPackage{caption}[2010/01/09 v3.1m Customizing captions (AR)]   Error message and example file follow.  *******************************************     ERROR: Argument of \@caption has an extra }.  --- TeX said --- &lt;inserted text&gt;                  \par  l.13     }  --- HELP --- From the .log file...  I've run across a `}' that doesn't seem to match anything. For example, `\def\a#1{...}' and `\a}' would produce this error. If you simply proceed now, the `\par' that I've just inserted will cause me to report a runaway argument that might be the root of the problem. But if your `}' was spurious, just type `2' and it will go away. ******************************************************  \documentclass{article} \usepackage{caption} \begin{document}  \begin{figure}     \captionsetup{singlelinecheck=off}     \caption     {       foo       \begin{itemize}       \item bar       \end{itemize}     } \end{figure} \end{document} Tips for getting really good answers on SO I'm using Google calendar, and I subscribe to my Google Calendar from multiple computers.  Whenever I set an event with (an) email reminder(s) on Google calendar, I'll get multiple emails because (1) Google calendar itself sends me the email reminder and (2) each computer that subscribes the calendar tries to send the email reminder (when the computer wakes up).  It's very annoying. Stretch and scale CSS background Is there a way to get a background in CSS to stretch or scale to fill its container? Why aren't there any fighter carriers in the Star Trek universe? All of the ships of every species seem to be medium to large vessels with multiple crew members. Why aren't there single fighter craft and carrier ships to transport them in mass?  I've just noticed the difference between Battlestar Galactica and Star Trek, where the former has primarily aircraft carriers, and the latter has battleships.   Wouldn't a huge fleet of small fighters be extremely maneuverable and possibly stealthy?  Update:  For clarity, my question is not about the Federation and their choice of ships, but the universe at large. I would think there would be some diversity in space warfare strategy, such as huge armadas of fighters with base stations / carriers. How to find users by name I have a whole bunch of people I would love to follow or at least check out on Stack Overflow. I know them from places like Github as well as personal friends. However I am having a really hard time finding them even though I know e.g. their Gmail address and that they use OpenID via Gmail to login and their full name.   How come this is so painful? Note that I don't want to have to fuzz around with the data explorer just to find a friend of mine on Stack Overflow. What am I missing? Is it just not there or just not working properly? Raster calculator reclass 0 as 0 QGIS I want to process a raster with values 0-16. I want to set all values between 1 and 15 as 1, a value of 16 as 0 and cells with a value of 0 as 0.   How do I maintain a cell value of 0?  I have tried the following:  ("raster_name@1" !=0 AND "raster_name@1" &lt;= 15*1)+("raster_name@1" = 16*0)   Results in: Values of 16 as 0, values 1-15 as 1, values 0 also = 1  I also tried:  ("raster_name@1" !=0 AND "raster_name@1" &lt;= 15*1)+("raster_name@1" 16*0)+("raster_name@1" = 0*0)   Results in: Values of 16 as 0, values 1-15 as 1, values 0 = 2  Please, can you explain how to retain cells with a 0 value as 0? A question about eigenvalues of $5\times5$ matrix $A\in M_5({R})$  and $A^2-4A-I=0$ If $a_1,a_2,a_3,a_4,a_5$ are eigenvalues of $A$ what is value of $$\left(a_1-\dfrac{1}{a_1}\right)+\left(a_2-\dfrac{1}{a_2}\right)+\cdots+\left(a_5-\dfrac{1}{a_5}\right)$$ I tried to work with $A^2-4A-I=0$ but get nothing because $A_{5\times5}$ characteristic polynomial is something like $A^5+k_1A^4+...$ Any hint will be appreciated . Why is the [I'm Done] button unavailable after only flagging comments in the First Posts review queue? I just flagged two comments during a review of a question in the First Posts queue (on another SE site). Then I wanted to select the button I'm Done, but it's unavailable (I can only select No action needed). Even if I refresh my page (while still on that review page), it remains the same.  If however I also downvote the question (only temporary, as a test, since I don't want to downvote the question being reviewed), then it seems to work as I'd expect it to: the button I'm Done becomes available, and No action needed becomes unavailable.  Why is the I'm Done button unavailable after only flagging comments in the First Posts review queue?  Notes:   I'm not convinced that you're supposed to review the actual post, and not (only) the comments underneath it (as mentioned in 's comment). Because "if" I would post a new comment, or just upvote an existing comment, I can actually select I'm Done. While in this case I flagged existing comments which IMO had become obsolete. Flagging comments is "acting on comments". And if my flag gets accepted (in this case: "no longer needed"), and the comment is actually deleted (by the mod), then it makes the question a bit more readable (= don't waste your time digesting a comment which is obsolete). Therefor "IMO", in the end I also "acted on the post". Think about all those posts with a zillion of comments, of which many are obsolete (e.g because the post got updated already). I am not sure (yet) if a similar issue exist in any other review queue (i.e. the Late Answers queue). In how many different ways can you split $10$ people into two groups with the same amount of people?  My attempt: Since the order in which you choose someone doesn't matter, I chose to calculate the combinations: $10 \choose 5$ Is there any reason to use this-> I am programming in C++ for many years, still I have doubt about one thing. In many places in other people code I see something like:  void Classx::memberfunction() {     this-&gt;doSomething(); }   If I need to import/use that code, I simply remove the this-> part, and I have never seen anything broken or having some side-effects.  void Classx::memberfunction() {     doSomething(); }   So, do you know of any reason to use such construct?  EDIT: Please note that I'm talking about member functions here, not variables. I understand it can be used when you want to make a distinction between a member variable and function parameter.  EDIT: apparent duplicate: How can I make Firefox open magnet-links in Transmission? I can't find out how to make Firefox open magnet-links in Transmission.   There is no option to make it the standard program for magnet-links in its properties, and as I am not experienced with the filesystem so I can't add it as the standard program in Firefox either. I've been taking photographs for a while, and have started to think about moving to full-frame. I'm on a very limited budget, but I currently have a good macro lens and am quite willing to buy something like a EF 50mm f/1.8 to start off with. I could possibly stretch my budget as far as a 70-200 f/4 L or 24-105 f/4 L.  Primarily, I'm interested in taking photos of small wildlife like reptiles, amphibians and insects, but I have a healthy interest in landscapes, birds and street photography.   I currently have an EOS 30D, and I love the way the camera handles, especially with the dual control dials. For this reason, I think shooting with a Rebel would be a significant step down.   However, I have seen 5Ds and occasionally 1Ds Mark IIs on ebay for roughly the same price as an EOS 650D. I'm sure these cameras have better IQ than my 30D, since they are pro-level bodies from around the same time, and full-frame besides. The question is, are these cameras now so old that the image quality from them is a substantial step down from current Rebels?   I realise I'll be giving up continuous shooting speed and some amount of low-light performance, and that I'd also need to get an external flash, but besides these, are there any substantial caveats I need to be aware of before I go ahead and take the plunge? I was reading a review of 5e game play  from our RSS Feed. And in it he makes an observation about a strange rule:     Weird rule thing. You recover half your level in hit dice during a   long rest, which means level 1 characters never recover hit dice.   That didn't make sense to me, and so I double checked the long rest rule and it reads:     At the end of a long rest, a character regains all lost it points.   The  character also regains spent Hit Dice, up to a number of dice   equal to half of the character’s total number of them. For example, if   a  character has eight Hit Dice, he or she can regain four spent Hit   Dice upon finishing a long rest.   And of course the rules state that in general you always round down.  Am I missing something? Is there a good explanation for why at first level you can't recover hitdice? If I have a Java source file (*.java) or a class file (*.class), how can I convert it to a .exe file?  I also need an installer for my program.