大约有 1,400 项符合查询结果（耗时：0.0219秒） [XML]
How to iterate over rows in a DataFrame in Pandas
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2951
DataFrame.iterrows is a generator which yields both the index and row (as a Series):
import pa...
Convert pandas dataframe to NumPy array
... edited May 10 '19 at 22:50
cs95
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answered May 5 '16 at 5:29
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Get operating system info
.../win98/i' => 'Windows 98',
'/win95/i' => 'Windows 95',
'/win16/i' => 'Windows 3.11',
'/macintosh|mac os x/i' => 'Mac OS X',
'/mac_powerpc/i' ...
Creating an empty Pandas DataFrame, then filling it?
... answered Jun 25 '19 at 2:51
cs95cs95
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Matplotlib tight_layout() doesn't take into account figure suptitle
...e very tight_layout call as follows:
fig.tight_layout(rect=[0, 0.03, 1, 0.95])
As it's stated in the documentation (https://matplotlib.org/users/tight_layout_guide.html):
tight_layout() only considers ticklabels, axis labels, and titles. Thus, other artists may be clipped and also may overlap...
Select by partial string from a pandas DataFrame
... answered Mar 25 '19 at 9:58
cs95cs95
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...
Compute a confidence interval from sample data
...as np
import scipy.stats
def mean_confidence_interval(data, confidence=0.95):
a = 1.0 * np.array(data)
n = len(a)
m, se = np.mean(a), scipy.stats.sem(a)
h = se * scipy.stats.t.ppf((1 + confidence) / 2., n-1)
return m, m-h, m+h
you can calculate like this way.
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Force R not to use exponential notation (e.g. e+10)?
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format(1e6, scientific=FALSE) returns "1000000" while as.character(1e6) returns "1e+06", so there is a difference between the two methods.
– mickey
Dec 4 '18 at 18:24
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Is there a simple way to delete a list element by value?
...y, numpy data in Cython. [@Gill's answer is O(n*n) unnecessarily (compare 1e6 and 1e12 – you don't want to risk the latter). while 1: L.remove(value) and return on ValueError might work well with a few values or small lists in CPython.
– jfs
Aug 23 '14 at 2:...
What is the difference between $(command) and `command` in shell programming?
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July 2014: The commit f25f5e6 (by Elia Pinto (devzero2000), April 2014, Git 2.0) adds to the nesting issue:
The backquoted form is the traditional method for command substitution, and is supported by POSIX.
However, all but the simplest uses beco...