大约有 47,000 项符合查询结果（耗时：0.0657秒） [XML]
What is the most efficient way to create a dictionary of two pandas Dataframe columns?
...
196
In [9]: pd.Series(df.Letter.values,index=df.Position).to_dict()
Out[9]: {1: 'a', 2: 'b', 3: 'c...
Concatenating two one-dimensional NumPy arrays
... as separate arguments.
From the NumPy documentation:
numpy.concatenate((a1, a2, ...), axis=0)
Join a sequence of arrays together.
It was trying to interpret your b as the axis parameter, which is why it complained it couldn't convert it into a scalar.
...
Get distance between two points in canvas
...
211
You can do it with pythagoras theorem
If you have two points (x1, y1) and (x2, y2)
then you ca...
How do I concatenate or merge arrays in Swift?
...
12 Answers
12
Active
...
Grouping functions (tapply, by, aggregate) and the *apply family
...
10 Answers
10
Active
...
How to create a density plot in matplotlib?
...
124
Sven has shown how to use the class gaussian_kde from Scipy, but you will notice that it doesn...
Why does Lua have no “continue” statement?
...
11 Answers
11
Active
...
How do you downgrade rubygems?
I have rubygems 1.3.1 installed but I want to go back to 1.2.0. What's the command to downgrade rubygems?
6 Answers
...
What is the bower (and npm) version syntax?
...example: to indicate you'll take any subsequent patch-level changes on the 1.2.x tree, starting with 1.2.0, but less than 1.3.0, you could use:
"angular": "~1.2"
or:
"angular": "~1.2.0"
This also gets you the same results as using the .x syntax:
"angular": "1.2.x"
But, you can use the tilde...
How do you plot bar charts in gnuplot?
...
124
Simple bar graph:
set boxwidth 0.5
set style fill solid
plot "data.dat" using 1:3:xtic(2) w...