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Linear Regression and group by in R

...ual 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 state then doing the regression inside the loop and adding the results of each reg...
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Are list-comprehensions and functional functions faster than “for loops”?

...el loop: >>> dis.dis(<the code object for `[x for x in range(10)]`>) 1 0 BUILD_LIST 0 3 LOAD_FAST 0 (.0) >> 6 FOR_ITER 12 (to 21) 9 STORE_FAST 1 (x) 12 LOAD_FAST...
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How to change the order of DataFrame columns?

...ged as needed. This is what you have now: In [6]: df Out[6]: 0 1 2 3 4 mean 0 0.445598 0.173835 0.343415 0.682252 0.582616 0.445543 1 0.881592 0.696942 0.702232 0.696724 0.373551 0.670208 2 0.662527 0.955193 0.131016 0.609548 0.8046...
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How to use a decimal range() step value?

Is there a way to step between 0 and 1 by 0.1? 33 Answers 33 ...
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How can I profile C++ code running on Linux?

... 1440 If your goal is to use a profiler, use one of the suggested ones. However, if you're in a hurry...
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How does the Brainfuck Hello World actually work?

... +100 1. Basics To understand Brainfuck you must imagine infinite array of cells initialized by 0 each. ...[0][0][0][0][0]... When brai...
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What is the easiest way to remove the first character from a string?

... I kind of favor using something like: asdf = "[12,23,987,43" asdf[0] = '' p asdf # >> "12,23,987,43" I'm always looking for the fastest and most readable way of doing things: require 'benchmark' N = 1_000_000 puts RUBY_VERSION STR = "[12,23,987,43" Benchmark.bm(7) do |b| ...
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Is there a simple way to remove multiple spaces in a string?

... Francisco Couzo 8,04633 gold badges2929 silver badges3737 bronze badges answered Oct 9 '09 at 21:52 Josh LeeJosh Lee ...
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Convert floats to ints in Pandas?

...nge(5), columns=['a']) df.a = df.a.astype(float) df Out[33]: a 0 0.0000000 1 1.0000000 2 2.0000000 3 3.0000000 4 4.0000000 pd.options.display.float_format = '{:,.0f}'.format df Out[35]: a 0 0 1 1 2 2 3 3 4 4 ...
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Convert tuple to list and back

...confused. – Jimmy Aug 28 '18 at 19:30 6 ...