I have access only to SOru analytics (), so can provide gif only from here.        Все сообщения = all posts. Вопросы = questions. Ответы = answers.  I guess it should be: All posts = answers + questions. But right now All posts == questions.  Exported CSV also has incorrect values.
Here's a screen capture from a site where I can view /site-analytics:    The orange "all posts" curve should be strictly larger than the blue "questions" curve, but they are mistakenly displaying the same data.
Is there an Amazon.com API to retrieve product reviews? Python CSV parsing not returning proper rows MLE for Poisson-binomial distribution I am looking for the maximum likelihood estimator (MLE) for the .  I understand the derivation of the MLE for a  and a , but I am unable to derive the MLE equation for the Poisson-binomial distribution. Is it possible for test error to be lower than training error Is it possible to have test error lower than training error?  I have a classification problem with 2000 samples, 500 of which are positives, 1500 are negatives. I split my data into 70% training data, 30% test data.  Run random forest with 200 estimators and cv=10. I did this several times and compared the recall and precision score and notice the scores for my test set is significantly better. Is this possible? How to render an ASP.NET MVC view as a string? Import curly brackets from MathDesign (Utopia) I am using Fourier maths fonts with Utopia text (\usepackage{fourier}) for a book project, but I'm not satisfied with the curly brackets \{ and \}. They are too slim, and barely distinguishable from other brackets in font size 10. Utopia with MathDesign (\usepackage[utopia]{mathdesign}) seems to have better-looking curly brackets.  Is there a way of importing just the curly brackets from MathDesign to my document, sticking to Fourier otherwise. And are the curly brackets defined by the maths fonts even if they are used outside math mode, since with MathDesign you get better-looking brackets in normal text, too.    Following egreg's answer I added the suggested lines, but the sizes of the bigger brackets are incorrect. When I load type $\{\bigl\{\Bigl\{\biggl\{\Biggl\{$, this is what I get:    After a bit of research, I've found that the cause seems to be the amsmath package. I'm relying on amsmath quite heavily, so it would be nice to find a fix. Unfortunately, I have almost no experience in working with fonts in LaTeX myself.  Below is a working example:  \documentclass{article}  \usepackage{amsmath} \usepackage{fourier}  \DeclareSymbolFont{mdsymbols}     {OMS}{mdput}{m}{n} \DeclareSymbolFont{mdlargesymbols}{OMX}{mdput}{m}{n} \DeclareMathDelimiter{\lbrace}    {\mathopen}{mdsymbols}{"66}{mdlargesymbols}{"08} \DeclareMathDelimiter{\rbrace}    {\mathclose}{mdsymbols}{"67}{mdlargesymbols}{"09} \renewcommand{\textbraceleft}{%   {\fontfamily{mdput}\fontencoding{OMS}\selectfont\char"66}} \renewcommand{\textbraceright}{%   {\fontfamily{mdput}\fontencoding{OMS}\selectfont\char"67}}  \begin{document} $\{\bigl\{\Bigl\{\biggl\{\Biggl\{$ \end{document} I'd like to implement a big int class in C++ as a programming exercise&mdash;a class that can handle numbers bigger than a long int.  I know that there are several open source implementations out there already, but I'd like to write my own.  I'm trying to get a feel for what the right approach is.  I understand that the general strategy is get the number as a string, and then break it up into smaller numbers (single digits for example), and place them in an array.  At this point it should be relatively simple to implement the various comparison operators.  My main concern is how I would implement things like addition and multiplication.  I'm looking for a general approach and advice as opposed to actual working code. Adding user to a group - Why had to reboot? I was not able to access the VirtualBox shared folder, so I made the user part of the vboxsf group. But, still not able to access it. Rebooting the guest resolved the problem. Is it a bug? A reboot is not required to add a user to a group.   sudo usermod -a -G vboxsf praveensripati   There was similar query .  I am using 11.10 and don't remember seeing similar behavior in 11.04. vi shows as vim When I type vi into a terminal it shows the following display:    Note that it says vim not vi, I'm sure I haven't downloaded vim yet and that this is actually vi not vim: for example the arrow keys print ABCD instead of moving. No "Login using Google" option in Android app I registered this ID with my Gmail account, and logged in successfully via web browser. However, while I was trying to log in on the Stack Exchange app in my Android Phone, I don't see any option to log in with Google:    I was told that no user was found with my Gmail account. It is amazing that I can log in via web browser, but cannot do so with the same Gmail account via app. How can I do that?  Just to compare, here is a "normal" login screen of another user:    Where did the Google login go and how can I bring it back?  My app version is 1.0.73, phone is Coolpad 8150D with Android version 4.0.3, kernel 3.0.8. Every word is marked as misspelled in TeXstudio Why is that most of the words, almost 90 percent, are marked as misspelled words when there is no error? And the spellchecking suggestions don't even look like English.  I am using TeXstudio as my editor. ETS() function, how to avoid forecast not in line with historical data? jQuery/JavaScript: accessing contents of an iframe I would like to manipulate the HTML inside an iframe using jQuery.  I thought I'd be able to do this by setting the context of the jQuery function to be the document of the iframe, something like:  $(function(){ //document ready     $('some selector', frames['nameOfMyIframe'].document).doStuff() });   However this doesn't seem to work. A bit of inspection shows me that the variables in frames['nameOfMyIframe'] are undefined unless I wait a while for the iframe to load. However, when the iframe loads the variables are not accessible (I get permission denied-type errors).  Does anyone know of a work-around to this? I have a solid understanding of most OOP theory but the one thing that confuses me a lot is virtual destructors. I thought that the destructor always gets called no matter what and for every object in the chain. When are you meant to make them virtual and why? How can one set the executable bit on files using umask? According to documentation, a umask of 000 should work, but in practice this only works on directories.  Also open to other methods of automatically setting +rwx on a particular user's created files if you have any. Ways to put numbered balls in boxes no box being empty I know the formula for putting $n$ identical balls in $r$ different boxes such that each box has at least 1 ball, but what is the formula for putting $n$ different balls in $r$ different boxes, no box being empty?  Thanks! Two sidebars in Beamer for two presentations in one tex file if I write,  #!/bin/bash echo "foo"   or  #!/bin/sh echo "foo"   both yields same. I have seen some scripts starting with #!/bin/sh or #!/bin/bash. Is there any difference between them? I'm not quite sure how the total attack bonus interacts with BAB.   Can you make more attacks than shown by your BAB (e.g. +11/+6/+1 BAB allows you to make 3 attacks) by having a high enough DEX, STR or other attack bonus modifiers? Assuming I have +11/+6/+1 BAB, and a spell gives me +6 attack bonus, would that make me able to attack as if I had +17/+12/+7/+2 BAB, giving me an extra attack?)   Can you make multiple attacks even if you have one of your stats drained, making your attack bonus negative, or less than 5?      It says in the SRD that the formula for attack bonus in melee is this:       Base attack bonus + Strength modifier + size modifier   I've also been told that you can make multiple attacks in one turn, but each attack gains a -5 penalty to attack bonus. A beginner's guide to SQL database design Do you know a good source to learn how to design SQL solutions?  Beyond the basic language syntax, I'm looking for something to help me understand:   What tables to build and how to link them How to design for different scales (small client APP to a huge distributed website) How to write effective / efficient  / elegant SQL queries