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Relative frequencies / proportions with dplyr
Suppose I want to calculate the proportion of different values within each group. For example, using the mtcars data, how do I calculate the relative frequency of number of gears by am (automatic/manual) in one go with dplyr ?
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How can I check if a view is visible or not in Android? [duplicate]
...sn't take up the "spot".
So to answer your question, you're looking for:
if (myImageView.getVisibility() == View.VISIBLE) {
// Its visible
} else {
// Either gone or invisible
}
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Simple (I think) Horizontal Line in WPF?
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@jpierson If you add it to a grid, you probably need to assign it to a row and column like any other control. Otherwise it will probably appear in the first row/col, and you will miss it. (It works properly on a StackPanel.)
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How do I choose between Tesseract and OpenCV? [closed]
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Tesseract is an OCR engine. It's used, worked on and funded by Google specifically to read text from images, perform basic document segmentation and operate on specific image inputs (a single word, line, paragraph, page, limited dictionaries, etc.).
OpenCV, on the other hand, is a computer vision l...
difference between css height : 100% vs height : auto
I was asked a question in an interview that "what is the difference between the css height:100% and height:auto ?"
4 An...
How to make my layout able to scroll down?
...>
As David Hedlund said, ScrollView can contain just one item... so if you had something like this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_pa...
how to get the cookies from a php curl into a variable
So some guy at some other company thought it would be awesome if instead of using soap or xml-rpc or rest or any other reasonable communication protocol he just embedded all of his response as cookies in the header.
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why unaligned apk is needed?
...ly be performed after the .apk file has been signed with your private key. If you perform zipalign before signing, then the signing procedure will undo the alignment.
See this answer for more. Here is the detailed build process:
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How do I use FileSystemObject in VBA?
...stbox
Click on the OK button.
This can also be done directly in the code if access to the VBA object model has been enabled.
Access can be enabled by ticking the check-box Trust access to the VBA project object model found at File > Options > Trust Center > Trust Center Settings > Mac...
What makes Scala's operator overloading “good”, but C++'s “bad”?
...e not to be repeated in newer languages. Certainly, it was one feature specifically dropped when designing Java.
14 Answers...