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如何选择机器学习算法 - 大数据 & AI - 清泛网移动版 - 专注C/C++及内核技术
...不同的参数），最后选择在交叉验证中表现最好的。jmp0m>x m>f 译自Edwin Chen
How do you know what machine learning algorithm to choose for your classification problem? Of course, if you really care about accuracy, your best bet is to test out a couple different ones (making sure t...
How to overload std::swap()
...ment-dependent lookup (ADL). One particularly easy thing to do is:
class m>X m>
{
// ...
friend void swap(m>X m>& a, m>X m>& b)
{
using std::swap; // bring in swap for built-in types
swap(a.base1, b.base1);
swap(a.base2, b.base2);
// ...
swap(a.member1...
Dynamically select data frame columns using $ and a character value
...different column names and I want to be able to loop over each of them to em>x m>tract that column from a data.frame. For em>x m>ample, consider the data set mtcars and some variable names stored in a character vector cols . When I try to select a variable from mtcars using a dynamic subset of cols , ne...
T-SQL stored procedure that accepts multiple Id values
...it.
Using the CLR. SQL Server 2005 and higher from .NET languages only.
m>X m>ML. Very good for inserting many rows; may be overkill for SELECTs.
Table of Numbers. Higher performance/complem>x m>ity than simple iterative method.
Fim>x m>ed-length Elements. Fim>x m>ed length improves speed over the delimited string
F...
How to determine if a list of polygon points are in clockwise order?
...
Some of the suggested methods will fail in the case of a non-convem>x m> polygon, such as a crescent. Here's a simple one that will work with non-convem>x m> polygons (it'll even work with a self-intersecting polygon like a figure-eight, telling you whether it's mostly clockwise).
Sum over the edges...
Django's SuspiciousOperation Invalid HTTP_HOST header
...
I think a more likely em>x m>planation is web crawlers (robots) simply crawling public IP addresses on port 80 - in which case you would want to allow them.
– markmnl
May 16 '14 at 4:12
...
Command line CSV viewer? [closed]
Anyone know of a command-line CSV viewer for Linum>x m>/OS m>X m>? I'm thinking of something like less but that spaces out the columns in a more readable way. (I'd be fine with opening it with OpenOffice Calc or Em>x m>cel, but that's way too overpowered for just looking at the data like I need to.) Having ...
Suggestions for debugging print stylesheets?
...Then, select Media in the emulation drawer, and check the CSS media checkbom>x m>.
This should do the trick.
Update: The menus have changed in DevTools.
It can now be found by clicking on the "three-dots" menu in the top right corner > More Tools > Rendering Settings > Emulate media > pr...
Pass mouse events through absolutely-positioned element
...ers. At the time this question was posted, I don’t think pointer-events em>x m>isted! I may switch the accepted answer over to this one at some point.
– s4y
Jun 23 '11 at 14:53
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