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Group by multiple columns in dplyr, using string vector input
...e
df2 <- plyr::ddply(data, columns, plyr::summarize, value=mean(value))
table(df1 == df2, useNA = 'ifany')
## TRUE
## 27
The output from your example question is as expected (see comparison to plyr above and output below):
# A tibble: 9 x 3
# Groups: asihckhdoydkhxiydfgfTgdsx [?]
asihck...
How to filter multiple values (OR operation) in angularJS
...ntion but your example doesn't seem to work as expected. The output in the table seems rather inconsistent.
– Hultner
Sep 16 '14 at 14:01
...
How accurately should I store latitude and longitude?
...o account the various parts of a sphere and a diagonal distance, here is a table of the precisions available:
Datatype Bytes resolution
------------------ ----- --------------------------------
Deg*100 (SMALLINT) 4 1570 m 1.0 mi Cities
DECIMAL(4,2)/(5,2) 5 ...
Div height 100% and expands to fit content
...g with the pseudo selector :after
.clearfix:after {
content: "";
display: table;
clear: both;
}
Then, in your HTML, add the .clearfix class to your parent Div. For example:
<div class="clearfix">
<div></div>
<div></div>
</div>
It should work always. ...
COALESCE Function in TSQL
...
declare @store table (store_id varchar(300))
insert into @store
values ('aa'),('bb'),('cc')
declare @str varchar (4000)
select @str = concat(@str+',',store_id) from @store
select @str
...
jquery-ui sortable | How to get it work on iPad/touchdevices?
How do I get the jQuery-UI sortable feature working on iPad and other touch devices?
3 Answers
...
SQL Server: converting UniqueIdentifier to string in a case statement
We have a log table that has a message column that sometimes has an exception stack trace. I have some criteria that determines if the message has this. We do not want to show these messages to the customer but instead have a message like:
...
SQL Server Regular expressions in T-SQL
... of people to SQL Server. The "people" are from the [Application].[People] table in the [WideWorldImporters] sample database. They get passed to the R engine as a dataframe named InputDataSet. R uses the grepl function with the "not" operator (exclamation point!) to find which people have email addr...
Sending a message to nil in Objective-C
...gt; 0 )
or this:
return [myArray count]; // say for number of rows in a table
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Find the closest ancestor element that has a specific class
...mprove it. It won't work on old browsers (i.e. IE); see this compatibility table for classList. parentElement is used here because parentNode would involve more work to make sure that the node is an element.
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