大约有 30,000 项符合查询结果(耗时:0.0305秒) [XML]

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Fastest way to find second (third…) highest/lowest value in vector or column

R offers mam>xm> and min, but I do not see a really fast way to find another value in the order, apart from sorting the whole vector and then picking a value m>xm> from this vector. ...
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Replacing NAs with latest non-NA value

...ke to "fill forward" NAs with the closest previous non-NA value. A simple em>xm>ample, using vectors (instead of a data.frame ) is the following: ...
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How can I use numpy.correlate to do autocorrelation?

...n should be the highest because the signal is identical to itself, so you em>xm>pected that the first element in the autocorrelation result array would be the greatest. However, the correlation is not starting at a time difference of 0. It starts at a negative time difference, closes to 0, and then goes...
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Find object in list that has attribute equal to some value (that meets any condition)

... nem>xm>t((m>xm> for m>xm> in test_list if m>xm>.value == value), None) This gets the first item from the list that matches the condition, and returns None if no item matches. It's my preferred single-em>xm>pression form. However, for m>xm> in test_li...
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Mam>xm> return value if empty query

... int mam>xm>ShoeSize = Workers.Where(m>xm> => m>xm>.CompanyId == 8) .Select(m>xm> => m>xm>.ShoeSize) .DefaultIfEmpty(0) .Mam>xm>(); The zero in DefaultIfEmpty is not necessa...
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What are best practices that you use when writing Objective-C and Cocoa? [closed]

... 1 2 Nem>xm>t 398 votes ...
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图表组件 · App Inventor 2 中文网

...饼图不适用)。 高度 设置图表的垂直高度,以像素pm>xm>为单位。 高度百分比 设置图表的垂直高度相对于整个屏幕高度的百分比。 标签列表 将图表的 m>xm> 轴标签更改为指定的列表,如果图表类型设置为带轴图表。 列表...
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Weak and strong property setter attributes in Objective-C

...are done with it.Using the keyword strong means that you own the object. Em>xm>ample: @property (strong, nonatomic) ViewController *viewController; @synthesize viewController; 02.weak (iOS4 = unsafe_unretained ) - it says "keep this as long as someone else points to it strongly" - the same ...
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What's the best way to bundle static resources in a Go program? [closed]

...hey need to go. However, I'd also like to be able to simply distribute an em>xm>ecutable with as few files/dependencies as possible. Is there a good way to bundle the HTML/CSS/JS with the em>xm>ecutable, so users only have to download and worry about one file? ...
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How do I create an Em>xm>cel (.m>Xm>LS and .m>Xm>LSm>Xm>) file in C# without installing Microsoft Office?

How can I create an Em>xm>cel spreadsheet with C# without requiring Em>xm>cel to be installed on the machine that's running the code? ...