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How to randomize (or permute) a dataframe rowwise and columnwise?
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a b c
3 0 1 0
4 0 0 0
2 1 0 0
1 1 1 0
By default sample() randomly reorders the elements passed as the first argument. This means that the default size is the size of the passed array. Passing parameter replace=FALSE (the default) to sample(...) ensures that sampling is done without replacem...
Focus Next Element In Tab Index
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Note that using flexbox the order of the elements are different in the DOM than visually in the browser. Just picking the next tabbable element does not work when you change the order of elements using flexbox.
– Haneev
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How do you sort a dictionary by value?
...example, I have a hash of words and respective frequencies, that I want to order by frequency.
18 Answers
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The smallest difference between 2 Angles
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It returns the signed delta angle. Note that depending on your API the order of the parameters for the atan2() function might be different.
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Relative frequencies / proportions with dplyr
...ep with groups.
The outcome of the peeling is of course dependent of the order of the grouping variables in the group_by call. You may wish to do a subsequent group_by(am), to make your code more explicit.
For rounding and prettification, please refer to the nice answer by @Tyler Rinker.
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What is the correct answer for cout
...ce result b, which outputs 01.
See P0145R3 Refining Expression Evaluation Order for Idiomatic C++ for more details.
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VBA - how to conditionally skip a for loop iteration
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What is the difference between List (of T) and Collection(of T)?
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In C#, there are three concepts for representing a bag of objects. In order of increasing features, they are:
Enumerable - unordered, unmodifiable
Collection - can add/remove items
List - allows items to have an order (accessing and removing by index)
Enumerable has no order. You cannot add...
How does Python 2 compare string and int? Why do lists compare as greater than numbers, and tuples g
...ython implementation detail: Objects of different types except numbers are ordered by their type names; objects of the same types that don’t support proper comparison are ordered by their address.
When you order two strings or two numeric types the ordering is done in the expected way (lexicogra...
Factors in R: more than an annoyance?
...y they are useful because model fitting packages like lme4 use factors and ordered factors to differentially fit models and determine the type of contrasts to use. And graphing packages also use them to group by. ggplot and most model fitting functions coerce character vectors to factors, so the res...