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get list of pandas dataframe columns based on data type
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320
If you want a list of columns of a certain type, you can use groupby:
>>> df = pd.Da...
Specify custom Date format for colClasses argument in read.table/read.csv
...rom) as.Date(from, format="%d/%m/%Y") )
tmp <- c("1, 15/08/2008", "2, 23/05/2010")
con <- textConnection(tmp)
tmp2 <- read.csv(con, colClasses=c('numeric','myDate'), header=FALSE)
str(tmp2)
Then modify if needed to work for your data.
Edit ---
You might want to run setClass('myDate') ...
How to get values from IGrouping
... codidact.com
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answered Dec 15 '11 at 13:56
Matt SmithMatt Smith
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Select statement to find duplicates on certain fields
... which there are multiple records, you can use..
select field1,field2,field3, count(*)
from table_name
group by field1,field2,field3
having count(*) > 1
Check this link for more information on how to delete the rows.
http://support.microsoft.com/kb/139444
There should be a criterion for de...
Get integer value from string in swift
...ft 2.0 you can initialize Integer using constructor
var stringNumber = "1234"
var numberFromString = Int(stringNumber)
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Convert a matrix to a 1 dimensional array
I have a matrix (32X48).
10 Answers
10
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How to split a column into two columns?
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143
There might be a better way, but this here's one approach:
row
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How can I remove 3 characters at the end of a string in php?
How can I remove 3 characters at the end of a string in php? "abcabcabc" would become "abcabc"!
3 Answers
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How to percent-encode URL parameters in Python?
...ue, there is a bug report about it here. Apparently it was fixed in python 3. You can workaround it by encoding as utf8 like this:
>>> query = urllib.quote(u"Müller".encode('utf8'))
>>> print urllib.unquote(query).decode('utf8')
Müller
By the way have a look at urlencode
Pyth...
Can I use `pip` instead of `easy_install` for `python setup.py install` dependency resolution?
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