I'm looking for a texture like this one:    Or the grid on the ground here:    Are those already implemented in blender internal? Or else in Cycles ?  I searched for "grid textures", "color grid textures" (on google) to get the images and apply them as image textures but I didn't find them.  Is it possible to generate them procedurally (in python)?
How to I deal with unwrapped UVs orientation?   Delete the default Cube. Add a Cylinder Edit mode and edge select the Top and the Bottom and a single connecting edge. Make them into seams UV Unwrap (standard Unwrap mode)   The unwrapped UV now shows two circles above a row of quads. I can save this and open it in an image editor and paint over those areas and get the texture to align on the cylinder back in blender.  But, the pattern(just happens to be text) that was inserted in place of the row of quads is now upside down on the model. Any attempt to flip or align just makes things worse, from upside down to mirrored or the Top/Bottom not aligning.  So my real question is how could I have known that the quads represented an upside down view of the world?  Do other blender users export UVs and mark them with arrows and colours just to see how they align on a model before actually painting for real?  I tried selecting the edges in step 3 in different orders before making them into seams and it made no difference.  I also looked at the Normals but they appear to be only Inside/Outside not Up/Down.  Blender 2.70
I was looking at  and I didn't realize that Minecraft had some Easter eggs in it. Besides the Christmas chest Easter egg, and the sheep Easter egg, what else is there? How to reduce the spacing between responses in the alterqcm package? This question has a continuation here   The alterqcm package is no longer maintained by Alain Matthes. Two other developers maintain it. I wrote to them 15 days ago by email to report the error reported here:  I have not received a reply. I am trying to reduce the spacing between the lines of the QCM as indicated in  by @Werner and it does not work. In addition, by using the David Carlisle's code given in , I get an X instead of a square.  Full code of the screenshot: \documentclass[12pt]{article} %\usepackage[utf8]{inputenc} %\usepackage[upright]{fourier} \usepackage{etoolbox}% http://ctan.org/pkg/etoolbox \usepackage[english]{alterqcm} \def\square{X} % &lt;---------- David Carlisle comment \def\nogreekalph{??} % &lt;---- David Carlisle comment \parindent0pt \begin{document} % Original display \begin{alterqcm}[lq=8cm]  \AQquestion{Question}{%  {Proposition 1},  {Proposition 2},  {Proposition 3}} \end{alterqcm}  \bigskip  % Smashed display !!!!!! Dont work now  {\begin{alterqcm}[lq=8cm]  \AQquestion{Question}{%  {\smash{Proposition 1}},  {\smash{Proposition 2}},  {\smash{Proposition 3}}} \end{alterqcm}}  \bigskip  % Global smashed display !!!! Dont work now  \makeatletter \patchcmd{\aq@prop}{\vbox{#1}}{\vbox{\smash{#1}}}{}{}% patch \aq@prop \makeatother \begin{alterqcm}[lq=8cm]  \AQquestion{Question}{%  {Proposition 1},  {Proposition 2},  {Proposition 3}} \end{alterqcm}  \end{document}  Is there a solution? What is a terminal and how do I open and use it? What is a terminal? How do I open a terminal window? How do I use the terminal? How to loop through a HashMap in JSP? Java generics T vs Object Permanently turn off new Google Maps and go back to old one I found new Google Maps slow, useless (routes with only two points) and wrong. Is there any way, I can turn it off completely and go back to favored old Google Maps? Or is this &mdash; as with everything in Google &mdash; one way trip?  I found  text on this matter, but it seems useless. I have the feeling, that it discuss something completely different. It says about lite indicator in bottom-right corner. I don't have something like that. And provided links, that should switch new Google Maps engine between WebGL and canvas-based, simply doesn't work. All of them opens new window with annoying advertisment about new maps.  I even tried pasing part of URL, they're talking about (force=canvas) into any URL that my new Google Maps uses. Of course without any luck.  So... is there any way, I can get rid of new Google Maps, once and permanently?  UPDATE: In these days (April, 2015) Google , that soon new Google Maps will be the only one available. To my extremely negative surprise, this question will become invalid soon! :( Why use iterators instead of array indices? Take the following two lines of code:  for (int i = 0; i &lt; some_vector.size(); i++) {     //do stuff }   And this:  for (some_iterator = some_vector.begin(); some_iterator != some_vector.end();     some_iterator++) {     //do stuff }   I'm told that the second way is preferred. Why exactly is this? How to pop-up alert to a user when he/she navigate away from page without saving the Records in custom visual force page? I want to add a comma in the thousands place for a number.     String.Format()? Is there a word for a question asked despite knowing the answer, but meant to elicit a response for the sake of the audience? In journalistic writing I often see writers, correspondents, and interviewers use questions in non-literal ways.  Of course there are rhetorical questions designed to make a point and not meant to literally elicit an answer.   Instead of that, I have in mind when an interviewer asks a correspondent, "why did she not go to the police?" when the interviewer already knows the story and knows the answer to the question, but wants the correspondent to articulate the answer for the audience's benefit.    Is there a commonly used term for this sort of a question?  A "leading" question generally implies an attempt to manipulate the respondent into giving certain responses, which is not exactly the same as what I'm describing. Suppose $m,n&gt;0$, $U$ an open subset of $\mathbb{R}^{m+n}$ and let $f: U \to \mathbb{R}^n$ be continuously differentiable.  Is it possible for $f$ to be injective?    My thinking is that continuous differentiability+injectivity suggests that this is sort of getting at a converse to the Inverse Function Theorem.  We know the Jacobian is not invertible at any point in $U$, and the question is asking if this implies that $f$ cannot be invertible in any neighborhood contained in $U$. I saw that it has been already reported that also they have earned courious badge but the badge has not been given. but their answers say that they must wait a day and the badge will be awarded.  In my case its 8/5 and it was 5/5 long time ago and I have never received a message telling that I have earned it. its just telling me that the next badge to be awarded is Curious badge.  this is my profile: Does a finite $[E:K]_s$ imply that $[E_s:K]$ is finite? Let $E/K$ be an algebraic extension of fields and denote by $E_s$ the separable closure of $K$ in $E$, i.e. the set of all elements of $E$ that are separable over $K$ (which can be shown is a (separable) subfield of $E$).  I would like to show that the implication     $\left[E:K\right]_s &lt; \infty \implies \left[E_s:K\right] &lt; \infty$   holds, where $\left[E:K\right]_s$ denotes the separable degree of $E/K$ and $\left[E_s:K\right]$ the 'ordinary' degree of $E_s/K$.  In the textbook I am learning with, it is said that one could use the Primitive Element Theorem to do this, but I would also be fine with any other approach, as long as it's not getting too fancy and staying in the realm of 'common' textbook theorems known when dealing with separable extensions (and I didn't see how the Primitive Element Theorem would help).  This is not my focus (I want to write a Bachelor's thesis about polynomial factorizing elements of $\mathbb{Z}[X]$), but I'm in the process of reading into commutative algebra after about 1.5 years break from it.  My idea was something like assuming $\left[E_s:K\right] &lt; \infty$ and $\left[E_s:K\right] = \infty$ to construct infinitely many $K$-homomorphisms $E_s/K \longrightarrow C/K$, where $C$ is some algebraic closure of $E_s$, which would then contradict $\left[E_s:K\right]_s = \left[E_s:K\right] &lt; \infty$. Of course, an infinite basis would yield infinitely many $K$-vector space homomorphisms, but getting (infinitely many) ring morphisms seems to by an entirely different ting (unsurprisingly so...). Thought of using something like     Given two roots of the minimal polynomial of one of the infinitely many elements of a $K$-basis of $E_s/K$, there is a $K$-morphism $E_s/K \longrightarrow C/K$ that sends one to the other.   but this didn't seem very fruitful. I admit I haven't spent hours on this, I just didn't get very far and should focus on moving on, while still getting an answer on the 'howto' along the road would be really nice. First, my apologies if this has already been asked/answered.  I wasn't able to find this question via search.  My question comes from Rudin's "Principles of Mathematical Analysis," or "Baby Rudin," Ch 1, Example 1.1 on p. 2.  In the second version of the proof, showing that sets A and B do not have greatest or lowest elements respectively, he presents a seemingly arbitrary assignment of a number $q$ that satisfies equations (3) and (4), plus other conditions needed to show that $q$ is the right number for the proof.  As an exercise, I tried to derive his choice of $q$ so that I may learn more about the problem.  If we write equations (3) as $q = p - (p^2 - 2)x$, we can write (4) as   $$ q^2 - 2 = (p^2 - 2)[1 - 2px + (p^2 - 2)x^2]. $$  Here, we need a rational $x &gt; 0$, chosen such that the expression in $[...]$ is positive.  Using the quadratic formula and the sign of $(p^2 - 2)$, it can be shown that we need   $$ x \in \left(0, \frac{1}{p + \sqrt{2}}\right) \mbox{ for } p \in A, $$  or, for $p \in B$, $x &lt; 1/\left(p + \sqrt{2}\right)$ or $x &gt; 1/\left(p - \sqrt{2}\right)$.  Notice that there are MANY solutions to these equations! The easiest to see, perhaps, is letting $x = 1/(p + n)$ for $n \geq 2$.  Notice that Rudin chooses $n = 2$ for his answer, but it checks out easily for other $n$.  The Question:  Why does Rudin choose $x = 1/(p + 2)$ specifically?  Is it just to make the expressions work out clearly algebraically?  Why doesn't he comment on his particular choice or the nature of the set of solutions that will work for the proof?  Is there a simpler derivation for the number $q$ that I am missing? No notification (+15) for accepted answer How to make text aligned left/center/right in the same line? For a multiclass imbalanced problem, accuracy is not a good metric to evaluate model performance. Equally, accuracy is a global metric, so nothing like accuracy per-class (doesn't make sense). Scikit-learn provides the classification_report  function so one can evaluate model's precision/recall per class, e.g: classification_report(y_true, y_pred, target_names=target_names)               precision    recall  f1-score   support       Class:0      0.703     0.896     0.788      4491      Class:1      0.048     0.147     0.072        75      Class:2      0.368     0.503     0.425      1097      Class:3      0.937     0.850     0.892     17162      Class:4      0.529     0.177     0.265       311      accuracy                          0.832     23136    macro avg      0.517     0.515     0.488     23136 weighted avg      0.856     0.832     0.838     23136  Are there other metrics that evaluate per-class so I can evaluate my model across more metrics than precision/recall/f1? The goal is to assess the model on a per-class basis. Why does "kill -9 0" end my console session? I just wonder why kill -9 0 ends my tty console session?   What exactly is PID 0, it is not listed on a ps aux? When trying to launch Audacity, I get the following error:  Audacity could not find a place to store temporary files. Please enter an appropriate directory in the preferences dialog.   No files or folder have been moved.   I have purged Audacity, deleted any files, etc manually and re-installed   In terminal:  pst007x@pst007x-Serval-Professional:~$ audacity   (process:16390): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::sm-connect after class was initialised  (process:16390): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::show-crash-dialog after class was initialised  (process:16390): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::display after class was initialised  (process:16390): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::default-icon after class was initialised  ** (Audacity:16390): WARNING **: Owner of /tmp/orbit-pst007x is not the current user  Segmentation fault pst007x@pst007x-Serval-Professional:~$    I have not changed any users or added any additional users. All privaleges, etc are default.   Ubuntu 13.10 64bit (all updates applied)  ADDITIONAL:  I can open as gksu audacity  So it looks like privileges is an issue somewhere. I have checked all privileges and all seems ok, but clearly not....  I tried changing the Directory in Preferences to a directory in my home folder:  /home/pst007x/Music/audacity_temp/  but when starting again (not in root) same error...  Any ideas what files could be lacking privileges?   After changing the Directory, when running I get this:  pst007x@pst007x-Serval-Professional:~$ audacity   (process:28364): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::sm-connect after class was initialised  (process:28364): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::show-crash-dialog after class was initialised  (process:28364): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::display after class was initialised  (process:28364): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::default-icon after class was initialised Segmentation fault pst007x@pst007x-Serval-Professional:~$    I checked installed files using Synaptic Package Manager, then checked permissions:  pst007x@pst007x-Serval-Professional:~$ sudo chmod -R 777 /usr [sudo] password for pst007x:  pst007x@pst007x-Serval-Professional:~$ audacity  (process:31026): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::sm-connect after class was initialised  (process:31026): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::show-crash-dialog after class was initialised  (process:31026): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::display after class was initialised  (process:31026): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::default-icon after class was initialised Segmentation fault pst007x@pst007x-Serval-Professional:~$    EDIT. After the above, I rebooted and was no longer able to login. So I did a fresh install. Not a bad thing since the original install on the this system was 10.10. Working ok after fresh install.  Thank you for taking the time to post answers and suggestions.. How to prove the existence of $b$ in $Q$ such that $a<b^2<c$ in $Q$?