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import module from string variable
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288
The __import__ function can be a bit hard to understand.
If you change
i = __import__('matp...
Pass a data.frame column name to a function
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You can just use the column name directly:
df <- data.frame(A=1:10, B=2:11, C=3:12)
fun1 <- function(x, column){
max(x[,column])
}
fun1(df, "B")
fun1(df, c("B","A"))
There's no need to use substitute, eval, etc.
You can even pass the desired function as a parameter:
fun1 <- function...
How do I create directory if it doesn't exist to create a file?
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edited Nov 20 '18 at 9:59
BKSpurgeon
21.7k88 gold badges7777 silver badges6363 bronze badges
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Installing CocoaPods: no response
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Iulian Onofrei
6,77988 gold badges5252 silver badges9393 bronze badges
answered May 11 '13 at 13:59
AlexAlex
4,35...
Find the max of two or more columns with pandas
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2 Answers
2
Active
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Transform DateTime into simple Date in Ruby on Rails
...ew.to_date
NoMethodError: undefined method 'to_date' for #<DateTime: -1/2,0,2299161>
from (irb):1
>> require 'active_support/core_ext'
=> true
>> DateTime.new.to_date
=> Mon, 01 Jan -4712
share...
How to get the last N rows of a pandas DataFrame?
I have pandas dataframe df1 and df2 (df1 is vanila dataframe, df2 is indexed by 'STK_ID' & 'RPT_Date') :
3 Answers
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Path to Powershell.exe (v 2.0)
Where is the Powershell (version 2.0) located? What is the path to Powershell.exe? I have Windows Server 2008 and Powershell installed. When I look at this folder:
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Name of this month (Date.today.month as name)
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edited Jan 23 '15 at 23:15
answered Jan 30 '11 at 17:18
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How to use Bash to create a folder if it doesn't already exist?
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280
First, in bash "[" is just a command, which expects string "]" as a last argument, so the whit...