大约有 47,000 项符合查询结果（耗时：0.0537秒） [XML]
Why does one hot encoding improve machine learning performance?
...h" and "US". Assume, without loss of generality, that these are encoded as 0, 1 and 2. You then have a weight w for this feature in a linear classifier, which will make some kind of decision based on the constraint w×x + b > 0, or equivalently w×x < b.
The problem now is that the weight w c...
Plot yerr/xerr as shaded region rather than error bars
...
from matplotlib import pyplot as plt
import numpy as np
x = np.linspace(0, 30, 30)
y = np.sin(x/6*np.pi)
error = np.random.normal(0.1, 0.02, size=y.shape)
y += np.random.normal(0, 0.1, size=y.shape)
plt.plot(x, y, 'k-')
plt.fill_between(x, y-error, y+error)
plt.show()
See also the matplotlib...
Hadoop “Unable to load native-hadoop library for your platform” warning
...
230
I assume you're running Hadoop on 64bit CentOS. The reason you saw that warning is the native Ha...
Scala constructor overload?
...tructors in Scala must either call the primary constructor (as in landon9720's) answer, or another auxiliary constructor from the same class, as their first action. They cannot simply call the superclass's constructor explicitly or implicitly as they can in Java. This ensures that the primary constr...
Maintain aspect ratio of div but fill screen width and height in CSS?
... breaking the ratio and without scrollbars!
(PURE) CSS
div
{
width: 100vw;
height: 56.25vw; /* height:width ratio = 9/16 = .5625 */
background: pink;
max-height: 100vh;
max-width: 177.78vh; /* 16/9 = 1.778 */
margin: auto;
position: absolute;
top:0;bottom:0; /* ve...
Javascript and regex: split string and keep the separator
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106
Use (positive) lookahead so that the regular expression asserts that the special character exis...
Reduce left and right margins in matplotlib plot
...E.g.
import matplotlib.pyplot as plt
import numpy as np
data = np.arange(3000).reshape((100,30))
plt.imshow(data)
plt.savefig('test.png', bbox_inches='tight')
Another way is to use fig.tight_layout()
import matplotlib.pyplot as plt
import numpy as np
xs = np.linspace(0, 1, 20); ys = np.sin(xs)
...
How to generate keyboard events in Python?
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+50
It can be done using ctypes:
import ctypes
from ctypes import wintypes
import time
user32 = ctypes.WinDLL('user32', use_last_error=T...
How to show SQL queries run in the Rails console?
... |
edited Jul 25 '18 at 0:36
morhook
48455 silver badges1515 bronze badges
answered May 29 '10 at 17:4...
CSS I want a div to be on top of everything
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dev.bv
93099 silver badges1616 bronze badges
answered Sep 14 '11 at 19:22
Skylar AndersonSkylar Anderson
...