大约有 47,000 项符合查询结果（耗时：0.0524秒） [XML]
Count number of rows within each group
...
I don't know but this could be useful as well... df %>% group_by(group, variable) %>% mutate(count = n())
– Manoj Kumar
Dec 14 '16 at 17:57
...
How do I install PyCrypto on Windows?
...iler and Setuptools 6.0 or later, and most packages with C extensions will now compile readily.
share
|
improve this answer
|
follow
|
...
Label encoding across multiple columns in scikit-learn
...commended way is
OneHotEncoder().fit_transform(df)
as the OneHotEncoder now supports string input.
Applying OneHotEncoder only to certain columns is possible with the ColumnTransformer.
EDIT:
Since this answer is over a year ago, and generated many upvotes (including a bounty), I should probabl...
Fast permutation -> number -> permutation mapping algorithms
...elements. For the sake of an example, let's say, 7 elements, 1234567. I know there are 7! = 5040 permutations possible of these 7 elements.
...
What do “branch”, “tag” and “trunk” mean in Subversion repositories?
...at and why. In many VCS, if you modify a tag, there may not be any way to know.
– David W.
Mar 1 '15 at 19:33
3
...
Code formatting shortcuts in Android Studio for Operation Systems
...successfully changed the keyboard shortcut.
Check if the keyboard shortcut now works in Android Studio.
Alternative method
Ctrl + Alt + Shift + L (to show a dialog)
You can also use Eclipse shortcuts.
Windows and Linux: Go to menu File → Settings → Keymap
macOS: Go to menu Preference...
Is there a JavaScript function that can pad a string to get to a determined length?
...e relevant. The curse of recursion only applies when a programmer doesn't know when its appropriate.
– hypno7oad
Jul 31 '13 at 4:36
12
...
How to invoke a Linux shell command from Java
...
@Narek. It should, but I don;'t know how csh handles arguments.
– KitsuneYMG
Sep 17 '09 at 12:38
1
...
How do you synchronise projects to GitHub with Android Studio?
... the project and do git remote add <remote_name> <remote_url>
Now when you do VCS -> Commit changes -> Commit & Push you should see your remote and everything should work through the GUI.
If you are getting the error: fatal: remote <remote_name> already exists that me...
How do I show a console output/window in a forms application?
...s that changing this mysterious Visual Studio setting does). Does anyone know how this works under the hood?
– uglycoyote
Aug 14 '18 at 22:45
|
...