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How to convert index of a pandas dataframe into a column?
...ke:
>>> df
val
tick tag obs
2016-02-26 C 2 0.0139
2016-02-27 A 2 0.5577
2016-02-28 C 6 0.0303
and you want to convert the 1st (tick) and 3rd (obs) levels in the index into columns, you would do:
>>> df.reset_index(level=['tick...
Compare two data.frames to find the rows in data.frame 1 that are not present in data.frame 2
I have the following 2 data.frames:
13 Answers
13
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Installing Ruby Gem in Windows
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edited Feb 8 '17 at 12:07
reducing activity
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What is the difference between atan and atan2 in C++?
What is the difference between atan and atan2 in C++?
11 Answers
11
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Change text color based on brightness of the covered background area?
...lor
Here's the W3C algorithm (with JSFiddle demo too):
const rgb = [255, 0, 0];
// Randomly change to showcase updates
setInterval(setContrast, 1000);
function setContrast() {
// Randomly update colours
rgb[0] = Math.round(Math.random() * 255);
rgb[1] = Math.round(Math.random(...
Python: Check if one dictionary is a subset of another larger dictionary
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112
Convert to item pairs and check for containment.
all(item in superset.items() for item in subse...
What is the difference between shallow copy, deepcopy and normal assignment operation?
... the
original.
Here's a little demonstration:
import copy
a = [1, 2, 3]
b = [4, 5, 6]
c = [a, b]
Using normal assignment operatings to copy:
d = c
print id(c) == id(d) # True - d is the same object as c
print id(c[0]) == id(d[0]) # True - d[0] is the same object as c[0]
Us...
Transposing a NumPy array
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248
It's working exactly as it's supposed to. The transpose of a 1D array is still a 1D array! (I...
MFC CString::Format()函数详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...出double型数据
m数据输出宽度为m
.n输出小数位数为n
2、Args是一个变体数组，即它里面可以有多个参数，而且每个参数可以不同。
如以下例子：
Format("my name is %6s","wind");
返回后就是
my name is wind
现在来看Format参数...