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Linear Regression and group by in R
...it a regression for each state so that at the end I have a vector of lm responses. I can imagine doing for loop for each state then doing the regression inside the loop and adding the results of each regression to a vector. That does not seem very R-like, however. In SAS I would do a 'by' statement ...
Can you run GUI applications in a Docker container?
How can you run GUI applications in a Docker container?
22 Answers
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2 column div layout: right column with fixed width, left fluid
My requirement is simple: 2 columns where the right one has a fixed size . Unfortunately I couldn't find a working solution, neither on stackoverflow nor in Google. Each solution described there fails if I implement in my own context. The current solution is:
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ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock'
I installed LAMP on Ubuntu 12.04 LTS (Precise Pangolin) and then set root password on phpMyAdmin . I forgot the password and now I am unable to login. When I try to change password through terminal I get:
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Undefined, unspecified and implementation-defined behavior
What is undefined behavior in C and C++? What about unspecified behavior and implementation-defined behavior? What is the difference between them?
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How to send an email using PHP?
I am using PHP on a website and I want to add emailing functionality.
14 Answers
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Is there a numpy builtin to reject outliers from a list
Is there a numpy builtin to do something like the following? That is, take a list d and return a list filtered_d with any outlying elements removed based on some assumed distribution of the points in d .
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How to know which version of Symfony I have?
I know that I have downloaded a Symfony2 project and started with but I have updated my vendor several times and I want to know which version of symfony I have
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how to solve “ruby installation is missing psych” error?
...vm to install ruby 1.9.3. even though it was successfully installed, it complained about libyaml. and now every time i wanna install a gem (say rails) this warning shows up:
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How can I determine whether a 2D Point is within a Polygon?
I'm trying to create a fast 2D point inside polygon algorithm, for use in hit-testing (e.g. Polygon.contains(p:Point) ). Suggestions for effective techniques would be appreciated.
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