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Is there a rule-of-thumb for how to divide a dataset into training and validation sets?
Is there a rule-of-thumb for how to best divide data into training and validation sets? Is an even 50/50 split advisable? Or are there clear advantages of having more training data relative to validation data (or vice versa)? Or is this choice pretty much application dependent?
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How can I add a boolean value to a NSDictionary?
Well, for integers I would use NSNumber . But YES and NO aren't objects, I guess. A.f.a.i.k. I can only add objects to an NSDictionary , right?
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What's the difference between the Dependency Injection and Service Locator patterns?
...ck implementations of its dependent objects. You could combine the two -- and inject the service locator (or a factory), if you wanted.
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Slowing speed of Viewpager controller in android
Is there any way to slow the scroll speed with the viewpager adaptor in android?
10 Answers
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JavaScript: empty array, [ ] evaluates to true in conditional structures. Why is this?
...zero in quotes), "false" (false in quotes), empty functions, empty arrays, and empty objects.
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Ant task to run an Ant target only if a file exists?
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Available and Condition
<target name="check-abc">
<available file="abc.txt" property="abc.present"/>
</target>
<target name="do-if-abc" depends="check-abc" if="abc.present">
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</target>
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How to delete the last n commits on Github and locally?
...itory. You can remove it with git push -f
– Ivan Fernandez
Jan 14 '13 at 11:33
Can you generalize this for last n numb...
python pandas remove duplicate columns
... solution to the problem. This applies if some column names are duplicated and you wish to remove them:
df = df.loc[:,~df.columns.duplicated()]
How it works:
Suppose the columns of the data frame are ['alpha','beta','alpha']
df.columns.duplicated() returns a boolean array: a True or False for e...
Open a project in a new window in IntelliJ after “accidentally” clicking remember decision
I wanted to open a new project in a separate window in IntelliJ and I "accidentally" clicked "Remember this decision and don't ask again" and clicked "open in the same window"!
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Why would $_FILES be empty when uploading files to PHP?
...e WampServer 2 installed on my Windows 7 computer. I'm using Apache 2.2.11 and PHP 5.2.11. When I attempt to upload any file from a form, it seems to upload, but in PHP, the $_FILES array is empty. There is no file in the c:\wamp\tmp folder. I have configured php.ini to allow file uploads and ...