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Which method performs better: .Any() vs .Count() > 0?
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edited Nov 20 '08 at 12:51
answered Nov 20 '08 at 12:37
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How do multiple clients connect simultaneously to one port, say 80, on a server? [duplicate]
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edited Sep 8 '19 at 2:45
answered Jul 25 '10 at 15:04
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Convert string[] to int[] in one line of code using LINQ
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621
Given an array you can use the Array.ConvertAll method:
int[] myInts = Array.ConvertAll(arr, s ...
Creating a zero-filled pandas data frame
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140
You can try this:
d = pd.DataFrame(0, index=np.arange(len(data)), columns=feature_list)
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Is it safe to check floating point values for equality to 0?
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115
It is safe to expect that the comparison will return true if and only if the double variable h...
Text border using css (border around text)
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text-shadow: 2px 0 0 #fff, -2px 0 0 #fff, 0 2px 0 #fff, 0 -2px 0 #fff, 1px 1px #fff, -1px -1px 0 #fff, 1px -1px 0 #fff, -1px 1px 0 #fff;
body {
font-family: sans-serif;
background: #222;
color: darkred;
}
h1 {
text-shadow: 2px 0 0 #fff, -2px 0 0 #fff, 0 2px 0 #fff, 0 -2px...
dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
...e .drop argument that does just what you asked for:
df = data.frame(a=rep(1:3,4), b=rep(1:2,6))
df$b = factor(df$b, levels=1:3)
df %>%
group_by(b, .drop=FALSE) %>%
summarise(count_a=length(a))
#> # A tibble: 3 x 2
#> b count_a
#> <fct> <int>
#> 1 1 ...
Evenly distributing n points on a sphere
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15 Answers
15
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How to smooth a curve in the right way?
...ort numpy as np
import matplotlib.pyplot as plt
x = np.linspace(0,2*np.pi,100)
y = np.sin(x) + np.random.random(100) * 0.2
yhat = savitzky_golay(y, 51, 3) # window size 51, polynomial order 3
plt.plot(x,y)
plt.plot(x,yhat, color='red')
plt.show()
UPDATE: It has come to my attention that the co...
Reading an Excel file in python using pandas
...t; xl = pd.ExcelFile("dummydata.xlsx")
>>> xl.sheet_names
[u'Sheet1', u'Sheet2', u'Sheet3']
>>> df = xl.parse("Sheet1")
>>> df.head()
Tid dummy1 dummy2 dummy3 dummy4 dummy5 \
0 2006-09-01 00:00:00 0 5.894611 0.605211 3.842871 8.265...