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There is a function called Map that may be similar to map in other languages: lapply returns a list of the same length as X, each element of which is the result of applying FUN to the corresponding element of X. Map is a wrapper around mapply lapply is a special case of mapply Therefore Map and lapply will be similar in many cases. Length Sepal. Width Petal. Length Petal. Width Species "numeric" "numeric" "numeric" "numeric" "factor". Improve this answer. Andrie Andrie k 40 40 gold badges silver badges bronze badges.
The function cbind is different from the function c , and although this also works, it gives different results. Joris Meys Joris Meys k 27 27 gold badges silver badges bronze badges. A code example: do. Claus Wilke Paul Hiemstra Paul Hiemstra In most simple words: lapply applies a given function for each element in a list,so there will be several function calls. The best way to learn is to play around with the function examples in the R documentation.
BenMorel Note that these functions are especially powerful when used in combination with more complex R codes such as in for-loops , while-loops , or user-defined functions. For that reason it makes a lot of sense to include those functions into your repertoire of R programming tricks! Below, you can find a list of other articles on my website, in which the do.
To summarize: At this point you should know how to call a function by its name in R. In case you have any additional questions, let me know in the comments. Your email address will not be published. Post Comment. On this website, I provide statistics tutorials as well as code in Python and R programming. YouTube privacy policy If you accept this notice, your choice will be saved and the page will refresh.
Leave a Reply Cancel reply Your email address will not be published. Related Tutorials. It seems that they're just similar to map function in Lisp. But why are there two functions with such a different name? Why doesn't R just use a function called map?
According to R Documentation:. Basic syntax:. Other objects including classed objects will be coerced by base::as. The function to be applied to each element of X.
The map functions transform their input by applying a function to each element and. Since Map is a wrapper around mapply , and lapply is a special case of mapply.
Therefore Map and lapply show similarity in a lot of cases. Its input is a function and it applies its other arguments to the function.
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