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How to convert a data frame column to numeric type?

... answered Feb 19 '10 at 0:31 aL3xaaL3xa 30.7k1717 gold badges7474 silver badges108108 bronze badges ...
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Has anyone actually implemented a Fibonacci-Heap efficiently?

... when the graph was incredibly large and dense, e.g.: Generating graph...10000 vertices, 20000000 edges. Running Dijkstra's with binary heap...1.46 seconds. Running Dijkstra's with Fibonacci heap...1.31 seconds. Speedup = 1.1145. As far as I understand, this touches at the fundamental differences...
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How can strings be concatenated?

... answered Apr 26 '10 at 6:59 mpenmpen 223k212212 gold badges734734 silver badges10661066 bronze badges ...
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Add table row in jQuery

...| edited May 23 '17 at 12:02 Community♦ 111 silver badge answered Oct 4 '08 at 21:49 ...
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TypeScript function overloading

... | edited Jun 12 '18 at 8:05 Ian Kemp 21.9k1414 gold badges9393 silver badges116116 bronze badges answer...
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How to edit log message already committed in Subversion?

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How to center buttons in Twitter Bootstrap 3?

...> </div> Edit As of BootstrapV4, center-block was dropped #19102 in favor of m-*-auto share | improve this answer | follow | ...
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How to pass the value of a variable to the stdin of a command?

...arlesworthOliver Charlesworth 246k2626 gold badges510510 silver badges632632 bronze badges 7 ...
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Heroku 'Permission denied (publickey) fatal: Could not read from remote repository' woes

...| edited Jul 9 '15 at 13:20 answered Aug 10 '13 at 22:40 Kr...
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Performance of Java matrix math libraries? [closed]

.... I've compared some of these libraries. I attempted to matrix multiply a 3000 by 3000 matrix of doubles with itself. The results are as follows. Using multithreaded ATLAS with C/C++, Octave, Python and R, the time taken was around 4 seconds. Using Jama with Java, the time taken was 50 seconds. U...