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dplyr: “Error in n(): function should not be called directly”
I am attempting to reproduce one of the examples in the dplyr package but am getting this error message. I am expecting to see a new column n produced with the frequency of each combination. What am I missing? I triple checked that the package is loaded.
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How can I find the first occurrence of a sub-string in a python string?
So if my string is "the dude is a cool dude".
I'd like to find the first index of 'dude':
5 Answers
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How should I escape commas and speech marks in CSV files so they work in Excel?
I'm generating a CSV file (delimited by commas rather than tabs). My users will most likely open the CSV file in Excel by double clicking it. My data may contain commas and speech marks, so I'm escaping those as follows.
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Generating all permutations of a given string
What is an elegant way to find all the permutations of a string. E.g. permutation for ba , would be ba and ab , but what about longer string such as abcdefgh ? Is there any Java implementation example?
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What are commit-ish and tree-ish in Git?
What are specific examples of commit-ish and tree-ish in Git?
2 Answers
2
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warning: implicit declaration of function
My compiler (GCC) is giving me the warning:
7 Answers
7
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jQuery UI Sortable Position
How do I track what position an element is when its position in a sortable list changes?
4 Answers
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Razor View Engine : An expression tree may not contain a dynamic operation
I have a model similar to this:
7 Answers
7
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How can I convert a hex string to a byte array? [duplicate]
Can we convert a hex string to a byte array using a built-in function in C# or do I have to make a custom method for this?
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How does internationalization work in JavaScript?
I'm wondering how to deal internationalization in JavaScript. I googled but I'm not getting convincing answers for:
4 Answe...