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Linear Regression and group by in R
I want to do a linear regression in R using the lm() function. My data is an annual time series with one field for year (22 years) and another for state (50 states). I want to fit 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 ...
What is the difference between encode/decode?
I've never been sure that I understand the difference between str/unicode decode and encode.
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How do I set up DNS for an apex domain (no www) pointing to a Heroku app?
I already added a custom domain to my Heroku app and it works with www.domain.com .
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What happens with constraints when a view is removed
The question I have is simple but I couldn't find any information in the documentation.
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How can I determine if a date is between two dates in Java? [duplicate]
How can I check if a date is between two other dates, in the case where all three dates are represented by instances of java.util.Date ?
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How can I use “” in javadoc without formatting?
If I write <xmlElement> in a javadoc, it does not appear, because tags have special functions on formatting texts.
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iPhone: Detecting user inactivity/idle time since last screen touch
Has anybody implemented a feature where if the user has not touched the screen for a certain time period, you take a certain action? I'm trying to figure out the best way to do that.
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Java Class.cast() vs. cast operator
Having being taught during my C++ days about evils of the C-style cast operator I was pleased at first to find that in Java 5 java.lang.Class had acquired a cast method.
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std::string to char*
I want to convert a std::string into a char* or char[] data type.
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How to close IPython Notebook properly?
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