indexing Questions
5
Solved
is there a way to dynamically access an array dimension (ideally without reshaping)?
I have an n-dimensional array arr as well as a named order of dimensions vals.
Both the number of dimensions for...
4
I found this: https://github.com/ether/etherpad-lite/wiki/How-to-list-all-pads
But I really cannot figure how to use it. Do I have to modify my templates/index.html and add that piece of code? Whe...
4
I have now successfully setup my static website in a CDN,
Is there a way to specify that index.html is the default document ?
It is a 1 page site I just would like to browse to the root url withou...
4
Is there any way to know which Elasticsearch version a particular index was created in?
This is mainly useful when you want to upgrade your cluster and there might be older indices which need to b...
Greenwich asked 3/12, 2019 at 14:19
4
Solved
Consider this:
a = array(1:60, c(3,4,5))
# Extract (*,2,2)^th elements
a[cbind(1:3,2,2)]
# ^^ returns a vector of length 3, c(16, 17, 18)
# Note this is asymptotically inefficient -- cbind(1:k,2...
Browse asked 19/8 at 9:29
4
I have performed a groupby on pandas and I want to apply a complex function which needs several inputs and gives as output a pandas Series that I want to burn in my original dataframe. this is a kn...
3
Solved
I want to know difference between Using index condition and Using where; Using index.
I think both method use index to fetch first result record set, and filter using WHERE condition.
Q1. What's t...
Lezley asked 27/2, 2015 at 7:20
5
Solved
I am relatively new to R. I am iterating over a vector in R by using for() loop. However, based on a certain condition, I need to skip some values in the vector. The first thought that comes to min...
7
Solved
These are some exemple vectors to reproduce:
a <- c(14,26,38,64,96,127,152,152,152,152,152,152)
b <- c(4,7,9,13,13,13,13,13,13,13,13,13,13,13)
c <- c(62,297,297,297,297,297,297,297,297,297...
4
here on SO are a lot of topics about getting the size of a folder programatically in Swift. All accepted answers suggest to use the FileManager and then enumerate over all files to and sum the size...
9
Solved
Is it possible to fine-tune directives to Google to such an extent that it will ignore part of a page, yet still index the rest?
There are a couple of different issues we've come across whic...
Scleroprotein asked 30/9, 2009 at 11:5
5
Solved
According to the documentation on the createIndexes command:
If you create an index with one set of options and then issue createIndexes with the same index fields but different options, MongoDB...
Aqaba asked 20/7, 2014 at 12:55
4
Solved
I have a dataframe like
df = pd.DataFrame({
'level0': [0,1,2],
'level1': ['a', 'b', 'b'],
'level2':['x', 'x', 'x'],
'data': [0.12, 0.34, 0.45]}
).set_index(['level0', 'level1', 'level2'])
...
2
Solved
I have a DataFrame and I am using .aggregate({'col1': np.sum}), this will perform a summation of the values in col1 and aggregate them together. Is it possible to perform a count, something like .a...
7
Solved
How are clustered indexes stored on a hard disk? What is the logical order?
How do non-clustered indexes work?
Alastair asked 15/2, 2010 at 13:17
12
Solved
Why does list.index throw an exception, instead of using an arbitrary value (for example, -1)? What's the idea behind this?
To me it looks cleaner to deal with special values, rather than exceptio...
2
Solved
Can someone point me to a link or provide an explanation of the benefits of indexing in pandas? I routinely deal with tables and join them based on columns, and this joining/merging process seems t...
9
C++, C#, C, D, Java,... are zero based.
Matlab is the only language I know that begin at 1.
2
Solved
I want to penalize some terms in query, not to ignore them at all so "MUST NOT" operator will not work?
Is it possible to use negative query boost with SHOULD in boolean query in lucene, how does i...
Intemerate asked 9/12, 2010 at 13:9
3
Solved
I'm having a serious problem with MySQL (innoDB) 5.0.
A very simple SQL query is executed with a very unexpected query plan.
The query:
SELECT
SQL_NO_CACHE
mbCategory.*
FROM
MBCategory mbCate...
Dishpan asked 6/11, 2012 at 15:18
6
I have a dataframe that has duplicated column names a, b and b. I would like to rename the second b into c.
df = pd.DataFrame({"a": [1, 2, 3], "b": [4, 5, 6], "b1": [7, 8, 9]})
df.rename(index=st...
5
Solved
Does anyone have a script to list of CREATE INDEX statements for all existing indexes in a SQL Server database?
This thread List of all index & index columns in SQL Server DB has great tips on...
Floranceflore asked 1/10, 2012 at 11:1
5
Solved
If I use type on a DataFrame which I know has a datetime index, I get:
In [17]: type(df.index)
Out[17]: pandas.tseries.index.DatetimeIndex
but when I test it, I get:
In [18]: type(df.index) == ...
5
Solved
So I need to extract elements from given list with indexes that are given in another list.
Signature supposed to be something like this:
search :: [Int] -> [a] -> [a]
and the result
searc...
8
Solved
Is there a way to systematically select the last columns of a data frame? I would like to be able to move the last columns to be the first columns, but maintain the order of the columns when they a...
1 Next >
© 2022 - 2024 — McMap. All rights reserved.