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Summarizing multiple columns with dplyr? [duplicate]
...ead.
# To map `funs` over a selection of variables, use `summarise_at()`
# Error: Strings must match column names. Unknown columns: mean
You should change to the following code. The following codes all have the same result.
# summarise_at
df %>% group_by(grp) %>%
summarise_at(.vars = le...
How to pass table value parameters to stored procedure from .net code
...ld need to set more ordinals
If you fail to do this you will get a parse error, failed to convert nvarchar to int.
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How to send an email with Python?
...cit close can be dropped, as the with block will close the file even if an error occurs inside it.
– jpmc26
Feb 21 '14 at 19:57
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Can I set null as the default value for a @Value in Spring?
...ded this for an Enum value, where an empty String just causes a conversion error. With the @null you can have a null as "no Enum set", which is what I need.
– Kevin Schmidt
Aug 17 '12 at 11:23
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What is the difference between `git merge` and `git merge --no-ff`?
...arly do something like git pull --ff-only without thinking, and then if it errors out you can go back and decide if you want to merge or rebase.
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What is the difference between JOIN and JOIN FETCH when using JPA and Hibernate
...ome Department attribute. Otherwise, (valid at least for PG) you might get ERROR: for SELECT DISTINCT, ORDER BY expressions must appear in select list
– long
Apr 21 at 14:08
a...
How do I compile a Visual Studio project from the command-line?
...s, but on a WIXPROJ to build my WIX installer, all I got is "CATASTROPHIC" error in the Out log.
This works:
MSBUILD /Path/PROJECT.WIXPROJ /t:Build /p:Configuration=Release
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Closing multiple issues in Github with a commit message
...t:
Summary of the change made.
Fixed following bugs:
* Modified error loader, fixes #1
* Returned a nonstale pointer, fixes #2
* Applied new graphics to gui elements, closes #3
He asked for the best way to close multiple issues.
Also note that if you push the commit with the messag...
Best Practice: Access form elements by HTML id or name attribute?
...g linting, bear in mind that linting is a style guide only, and a linting "error" doesn't mean your javascript is invalid or incorrect. In this particular case, though, what the linting rule is saying is "prefer dot notation when referencing javascript object properties". That's a good idea, and I...
Sass - Converting Hex to RGBa for background opacity
... transparency, and with solutions that include rgba() function you get an error like
background-color: rgba(#{$color}, 0.3);
^
$color: #002366 is not a color.
╷
│ background-color: rgba(#{$color}, 0.3);
│ ^^^^^^^^^^^^^...