大约有 44,000 项符合查询结果（耗时：0.0247秒） [XML]
How do I sort one vector based on values of another
...
This is prettm>y m> m>and m> shows a good understm>and m>ing of R's built-ins. +1
– Godeke
Oct 15 '09 at 15:21
6
...
How do I create test m>and m> train samples from one dataframe with pm>and m>as?
I have a fairlm>y m> large dataset in the form of a dataframe m>and m> I was wondering how I would be able to split the dataframe into two rm>and m>om samples (80% m>and m> 20%) for training m>and m> testing.
...
How to write a Unit Test?
...
Define the expected m>and m> desired output for a normal case, with correct input.
Now, implement the test bm>y m> declaring a class, name it anm>y m>thing (Usuallm>y m> something like TestAddingModule), m>and m> add the testAdd method to it (i.e. like the one below) :...
Check whether a string contains a substring
...cause a . can match anm>y m> character. m>Y m>ou can get around this bm>y m> using the \Q m>and m> \E operators.
mm>y m> $substring = "s1.domain.com";
if ($mm>y m>string =~ /\Q$substring\E/) {
print qq("$mm>y m>string" contains "$substring"\n);
}
Or, m>y m>ou can do as eugene m>y m> stated m>and m> use the index function.
Just a word of ...
Whm>y m> does “,,,” == Arram>y m>(4) in Javascript?
Boot up m>y m>our interpreter/console m>and m> trm>y m> the comparison
6 Answers
6
...
How to get screen dimensions as pixels in m>And m>roid
I created some custom elements, m>and m> I want to programmaticallm>y m> place them to the upper right corner ( n pixels from the top edge m>and m> m pixels from the right edge). Therefore I need to get the screen width m>and m> screen height m>and m> then set position:
...
Plot m>y m>err/xerr as shaded region rather than error bars
... numpm>y m> as np
x = np.linspace(0, 30, 30)
m>y m> = np.sin(x/6*np.pi)
error = np.rm>and m>om.normal(0.1, 0.02, size=m>y m>.shape)
m>y m> += np.rm>and m>om.normal(0, 0.1, size=m>y m>.shape)
plt.plot(x, m>y m>, 'k-')
plt.fill_between(x, m>y m>-error, m>y m>+error)
plt.show()
See also the matplotlib examples.
...
how to draw smooth curve through N points using javascript HTML5 canvas?
...nts), but for mm>y m> purposes (a drawing application), it's good enough for me m>and m> visuallm>y m> m>y m>ou can't tell the difference. There is a solution to go through all the sample points, but it is much more complicated (see http://www.cartogrammar.com/blog/actionscript-curves-update/)
Here is the the drawing...
Is it .m>y m>aml or .m>y m>ml?
...
The nature m>and m> even existence of file extensions is platform-dependent (some obscure platforms don't even have them, remember) -- in other sm>y m>stems them>y m>'re onlm>y m> conventional (UNIX m>and m> its ilk), while in still others them>y m> have definite se...
Determine if two rectangles overlap each other?
...akes the following inputs from the user to construct rectangles (between 2 m>and m> 5): height, width, x-pos, m>y m>-pos. All of these rectangles will exist parallel to the x m>and m> the m>y m> axis, that is all of their edges will have slopes of 0 or infinitm>y m>.
...