大约有 44,100 项符合查询结果（耗时：0.0496秒） [XML]
Remap values in pandas column with a dict
I have a dictionary which looks like this: di = {1: "A", 2: "B"}
10 Answers
10
...
How to install both Python 2.x and Python 3.x in Windows
...ging Library (PIL), ImageMagick, and wxPython, all of which require Python 2.x.
18 Answers
...
Could not locate Gemfile
...
answered Jul 25 '10 at 16:40
JoniJoni
2,85733 gold badges2121 silver badges2222 bronze badges
...
JavaScript function similar to Python range()
...
23 Answers
23
Active
...
Rounding up to next power of 2
I want to write a function that returns the nearest next power of 2 number. For example if my input is 789, the output should be 1024. Is there any way of achieving this without using any loops but just using some bitwise operators?
...
How does one reorder columns in a data frame?
...
Your dataframe has four columns like so df[,c(1,2,3,4)].
Note the first comma means keep all the rows, and the 1,2,3,4 refers to the columns.
To change the order as in the above question do df2[,c(1,3,2,4)]
If you want to output this file as a csv, do write.csv(df2, file...
Reshape three column data frame to matrix (“long” to “wide” format) [duplicate]
...o similar questions scattered around this site.
tmp <- data.frame(x=gl(2,3, labels=letters[24:25]),
y=gl(3,1,6, labels=letters[1:3]),
z=c(1,2,3,3,3,2))
Using the tidyverse:
The new cool new way to do this is with pivot_wider from tidyr 1.0.0. It returns a...
How to do multiple arguments to map function where one remains the same in python?
...
192
One option is a list comprehension:
[add(x, 2) for x in [1, 2, 3]]
More options:
a = [1, 2, ...