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 ...

How to center div horizontally, and vertically within the container using flexbox. In below example, I want each number below each other (in rows), which are centered horizontally. ...

I tried to understand the utility of backbone.js from its site http://documentcloud.github.com/backbone , but I still couldn't figure out much. ...

Instead of "installing" User-Scripts I found many tutorials on the web to add it manually. All of them told me to do the same steps: ...

I know ls -t will list all files by modified time. But how can I limit these results to only the last n files? 5 Answe...

So in high school math, and probably college, we are taught how to use trig functions, what they do, and what kinds of problems they solve. But they have always been presented to me as a black box. If you need the Sine or Cosine of something, you hit the sin or cos button on your calculator and you'...

I want to send a datetime.datetime object in serialized form from Python using JSON and de-serialize in JavaScript using JSON. What is the best way to do this? ...

Not obvious from the flask documention on how to get the query string. I am new, looked at the docs, could not find! 9 A...

When storing latitude or longitude data in an ANSI SQL compliant database, what datatype would be most appropriate? Should float be used, or decimal , or ...? ...

I'm trying to determine the best way to truncate or drop extra decimal places in SQL without rounding. For example: 18 Ans...