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How to calculate the number of occurrence of a given character in each row of a column of strings?
... up size of the test to 3000 rows)
q.data<-q.data[rep(1:NROW(q.data), 1000),]
str(q.data)
'data.frame': 3000 obs. of 3 variables:
$ number : int 1 2 3 1 2 3 1 2 3 1 ...
$ string : Factor w/ 3 levels "greatgreat","magic",..: 1 2 3 1 2 3 1 2 3 1 ...
$ number.of.a: int 2 1 0 2 1 0...
“Full screen”
...ypage.html" style="position:fixed; top:0; left:0; bottom:0; right:0; width:100%; height:100%; border:none; margin:0; padding:0; overflow:hidden; z-index:999999;">
Your browser doesn't support iframes
</iframe>
And be sure to set the framed page's margins to 0, e.g., body { margin: 0; ...
Why does (0 < 5 < 3) return true?
...example, you could increment a counter directly with the result of A > 100, which would increment the counter if A is greater than 100. This technique might be viewed as a quirk or a trick in Java, but in an array or functional language may be idiomatic.
A classic example in the array language...
How to remove an element slowly with jQuery?
...
100
target.fadeOut(300, function(){ $(this).remove();});
or
$('#target_id').fadeOut(300, functi...
Are custom elements valid HTML5?
... excellent walk through article on Google Developers about Custom Elements v1:
The name of a custom element must contain a dash (-). So <x-tags>, <my-element>, and <my-awesome-app> are all valid names, while <tabs> and <foo_bar> are not. This requirement is so the HTML...
show all tags in git log
... "git cat-file -p <tag>", where <tag> is heavyweight tag, e.g. v1.6.3 in git.git repository),
and also is default name of tag reference (reference in "refs/tags/*" namespace) pointing to a tag object.
Note that the tag reference (appropriate reference in the "refs/tags/*" namespace)...
Fast check for NaN in NumPy
...use numpy.sum in place of numpy.min:
In [13]: %timeit np.isnan(np.min(x))
1000 loops, best of 3: 244 us per loop
In [14]: %timeit np.isnan(np.sum(x))
10000 loops, best of 3: 97.3 us per loop
Unlike min, sum doesn't require branching, which on modern hardware tends to be pretty expensive. This is...
Secondary axis with twinx(): how to add to legend?
...np.arange(10)
temp = np.random.random(10)*30
Swdown = np.random.random(10)*100-10
Rn = np.random.random(10)*100-10
fig = plt.figure()
ax = fig.add_subplot(111)
lns1 = ax.plot(time, Swdown, '-', label = 'Swdown')
lns2 = ax.plot(time, Rn, '-', label = 'Rn')
ax2 = ax.twinx()
lns3 = ax2.plot(time, tem...
Join a list of strings in python and wrap each string in quotation marks
...t;> timeit.Timer("""words = ['hello', 'world', 'you', 'look', 'nice'] * 100; ', '.join('"{0}"'.format(w) for w in words)""").timeit(1000)
0.32559704780578613
>>> timeit.Timer("""words = ['hello', 'world', 'you', 'look', 'nice'] * 100; '"{}"'.format('", "'.join(words))""").timeit(1000)
0...
How to write the Fibonacci Sequence?
...owError when n is slightly above 600. Other approaches can handle an n of 1000 or more without blowing up or losing precision.
– cdlane
Sep 4 '17 at 20:54
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