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How to find out the number of CPUs using python
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Anthony Sottile
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answered Jun 17 '09 at 10:53
Nadia AlramliN...
Remove an entire column from a data.frame in R
...enome <- NULL
> head(Data)
chr region
1 chr1 CDS
2 chr1 exon
3 chr1 CDS
4 chr1 exon
5 chr1 CDS
6 chr1 exon
As pointed out in the comments, here are some other possibilities:
Data[2] <- NULL # Wojciech Sobala
Data[[2]] <- NULL # same as above
Data <- Data[,-2] ...
Optimise PostgreSQL for fast testing
...memory limit if you increase shared_buffers on PostgreSQL 9.2 and below; 9.3 and above changed how they use shared memory to avoid that.
If you're using a just a couple of connections that do lots of work, increase work_mem to give them more RAM to play with for sorts etc. Beware that too high a wo...
What is the difference between active and passive FTP?
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edited Apr 19 '18 at 6:38
answered Nov 9 '09 at 4:57
pax...
Best data type to store money values in MySQL
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378
Since money needs an exact representation don't use data types that are only approximate like ...
Instance variables vs. class variables in Python
...rtelli
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7
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Multi-gradient shapes
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383
I don't think you can do this in XML (at least not in Android), but I've found a good solution...
How do I get the last four characters from a string in C#?
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423
mystring.Substring(Math.Max(0, mystring.Length - 4)); //how many lines is this?
If you're posi...
Load and execute external js file in node.js with access to local variables?
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134
Just do a require('./yourfile.js');
Declare all the variables that you want outside access as ...
OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection
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163
This is a recurring subject in Stackoverflow and since I was unable to find a relevant implement...