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Filter data.frame rows by a logical condition
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To select rows according to one 'cell_type' (e.g. 'hesc'), use ==:
expr[expr$cell_type == "hesc", ]
To select rows according to two or more different 'cell_type', (e.g. either 'hesc' or 'bj fibroblast'), use %in%:
expr[expr$...
Android 4.3 Bluetooth Low Energy unstable
... I have a work around for being unable to unpair. 1) go to your bt menu, select unpair, remove the ble device from the area or depower it, select the ble device in the bt menu and it'll try to pair and fail, then reset bluetooth. Upon reset the device will be unpaired.
– Chr...
What is the difference between visibility:hidden and display:none?
...avior you want (but maybe sometimes it is?).
Another difference is if you select the text, then copy/paste as plain text, you get the following:
1st link.
2nd link.
3rd unseen link.
In case 3 the text does get copied. Maybe this would be useful for some type of watermarking, or if you wanted to...
“405 method not allowed” in IIS7.5 for “PUT” method
...ick on "WebDAV".
5.Click on "Request Restrictions".
6.In the tab "Verbs" select "All verbs" .
7.Press OK.
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Spring Data JPA find by embedded object property
...dByIdAndTwoId(Long oneId, Long twoId); and results in a query of the form: select ...... from one one_ left outer join two two_ on one_.two_id = two_.id where one_id = ? and two_.id = ?
– TroJaN
May 4 at 17:17
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Xcode: Build Failed, but no error messages
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Actually, here select Show all issues, instead of "Show issues for active scheme only" and you're good. The new build system has a huge performance advantage over the old one with Swift projects.
– Charlie Monroe
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Xcode - How to fix 'NSUnknownKeyException', reason: … this class is not key value coding-compliant f
...ng from "File's Owner" under "Place Holders" to "view" under "Objects" and selecting the view outlet.
– Nirma
Aug 11 '11 at 14:49
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Pass a data.frame column name to a function
...(x[,column])
}
fun1(df, "B", max)
Alternatively, using [[ also works for selecting a single column at a time:
df <- data.frame(A=1:10, B=2:11, C=3:12)
fun1 <- function(x, column){
max(x[[column]])
}
fun1(df, "B")
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Keyboard shortcut to paste clipboard content into command prompt window (Win XP) [closed]
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Just to explain selecting also: ALT+SPACE+E+K <-- for copy . and navigate up , down , left , right with arrows Shift + right arrow <-- for selecting the text ALT+SPACE+E+P <-- for paste.
– Yordan Georgiev
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What is the meaning of “$” sign in JavaScript
...ipt libraries copied this idea. Prototype also introduced a $$ function to select elements using CSS selector.
jQuery also adapted $ function but expanded to make it accept all kinds of 'selectors' to get the elements you want. Now, if you are already using Prototype in your project and wanted to ...