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Generate a heatmap in MatPlotLib using a scatter data set
...matplotlib.pyplot as plt
# Generate some test data
x = np.random.randn(8873)
y = np.random.randn(8873)
heatmap, xedges, yedges = np.histogram2d(x, y, bins=50)
extent = [xedges[0], xedges[-1], yedges[0], yedges[-1]]
plt.clf()
plt.imshow(heatmap.T, extent=extent, origin='lower')
plt.show()
This m...
What is the correct way of using C++11's range-based for?
... the elements
Let's consider a simple example:
vector<int> v = {1, 3, 5, 7, 9};
for (auto x : v)
cout << x << ' ';
The above code prints the elements (ints) in the vector:
1 3 5 7 9
Now consider another case, in which the vector elements are not just simple integers,
...
Base64 Decoding in iOS 7+
...
439
Swift 3+
let plainString = "foo"
Encoding
let plainData = plainString.data(using: .utf8)
le...
Restoring state of TextView after screen rotation?
... |
edited Jun 2 '11 at 6:30
answered May 23 '11 at 12:28
i...
How to add 30 minutes to a JavaScript Date object?
I'd like to get a Date object which is 30 minutes later than another Date object. How do I do it with JavaScript?
19 Answe...
How to convert 2D float numpy array to 2D int numpy array?
...
Use the astype method.
>>> x = np.array([[1.0, 2.3], [1.3, 2.9]])
>>> x
array([[ 1. , 2.3],
[ 1.3, 2.9]])
>>> x.astype(int)
array([[1, 2],
[1, 2]])
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map vs. hash_map in C++
...
134
They are implemented in very different ways.
hash_map (unordered_map in TR1 and Boost; use tho...
Enable Vim Syntax Highlighting By Default
... system (Arch Linux, and Mac, thanks @totophe), it's in /usr/share/vim/vim73.
On Windows, it's in \Program Files\Vim\vim73.
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CSS Selector that applies to elements with two classes
...attribute being set to two specific classes. For example, let's say I have 3 divs:
1 Answer
...
Converting between datetime, Timestamp and datetime64
...tetime.utcnow()
>>> dt
datetime.datetime(2012, 12, 4, 19, 51, 25, 362455)
>>> dt64 = np.datetime64(dt)
>>> ts = (dt64 - np.datetime64('1970-01-01T00:00:00Z')) / np.timedelta64(1, 's')
>>> ts
1354650685.3624549
>>> datetime.utcfromtimestamp(ts)
datetime.da...