大约有 45,000 项符合查询结果（耗时：0.0313秒） [XML]
How to get the first column of a pandas DataFrame as a Series?
... df.set_index('x').y
– herrfz
Jan 10 '14 at 23:44
4
...
Checking if a folder exists using a .bat file [closed]
...his https://jeffpar.github.io/kbarchive/kb/065/Q65994/
C:
IF NOT EXIST C:\WIN\ GOTO NOWINDIR
CD \WIN
:NOWINDIR
trailing backslash ('\') seems to be enough to distinguish between directories and ordinary files.
share
...
How to properly import a selfsigned certificate into Java keystore that is available to all Java app
... sure you know which JRE or JDK is being used to run your program. On a 64 bit Windows 7 there could be quite a few JREs. Process Explorer can help you with this or you can use: System.out.println(System.getProperty("java.home"));
Copy the file JAVA_HOME\lib\security\cacerts to another folder.
In Po...
How is Perl's @INC constructed? (aka What are all the ways of affecting where Perl modules are searc
...
answered Mar 26 '10 at 21:15
DVKDVK
117k2828 gold badges194194 silver badges306306 bronze badges
...
Removing Java 8 JDK from Mac
...
And if you also want to see if the JDK is 32bit or 64bit, something along the lines of alias java_ls='/usr/libexec/java_home -V 2>&1 | sed "/^ \(.*\) \(.*\),/!d;/^\s*$/d;s/^ \(.*\) \(.*\), \(.*\):\(.*\)$/\2 (\3)/g"' will do.
– Moreaki
...
Is it possible to specify your own distance function using scikit-learn K-Means Clustering?
...ance( X, Y ) = 1 - X . Y = Euclidean distance |X - Y|^2 / 2
is fast. For bit vectors, keep the norms separately from the vectors
instead of expanding out to floats
(although some programs may expand for you).
For sparse vectors, say 1 % of N, X . Y should take time O( 2 % N ),
space O(N); but I do...
How to concatenate two MP4 files using FFmpeg?
...t sample rates (e.g. 44,100 Hz and 48,000 Hz)? Or are they using different bit rates (e.g. 128 kbps and 64 kbps)? In either such case, I don't quite understand how the command -c copy (a stream-copy instruction) would modify the source files to make them compatible.
– Ed999
...
Difference between class and type
...a) The integral types are byte, short, int, and long, whose values are
8-bit, 16-bit, 32-bit and 64-bit signed two's-complement integers,
respectively, and char, whose values are 16-bit unsigned integers
representing UTF-16 code units (§3.1).
b) The floating-point types are float, whose ...
Why is MATLAB so fast in matrix multiplication?
...4
>> gputimeit(@()gA*gA)
ans =
0.0022
Update using R2018b on a WIN64 machine with 16 physical cores and a Tesla V100:
>> timeit(@()A*A)
ans =
0.0229
>> gputimeit(@()gA*gA)
ans =
4.8019e-04
(NB: at some point (I forget when exactly) gpuArray switched from MAGMA to cu...
Specify JDK for Maven to use
... |
edited May 7 at 10:15
Sergey Brunov
11.4k77 gold badges3535 silver badges6969 bronze badges
an...