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[DOCX File]Notes on R
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Everything that exists in R like variables, vectors, matrices/arrays, lists and data frames are R objects (matrices contain the same type of data; data frames may contain different types of data). In R, an object is anything that can be assigned to a variable. This includes constants, data …
r dataframe shape

[DOC File]R notes for BIOL 7083, Community Ecology, Fall 2003
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Fall 2009 - “R for Ecologists” ... or to create a dataframe using the data.frame() function and listing the two columns to include (as in tree.data.4). ... using stems equal to or larger than any size cutoff, and from any rectangular subplot of the larger sample plot (make sure you know how the variables that are passed into the function as ...
r dataframe length

[DOCX File]Virginia Tech
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This file contains one function, which takes as parameters a filename, an R dataframe data object, and an optional parameter that allows the data to be appended to an existing CSV file. The function uses the R ‘readr’ library [26] to implement a faster saving [27] method than is available through R’s base functions (write.csv, read.csv).
create an empty data frame r

[DOC File]CSSS 508: Intro to R - Carnegie Mellon University
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CSSS 508: Intro to R. 1/13/06. Basic Data Management. An object in R is any variable you define or a result of a function: “an object of data” A variable is a word or letter that you define and assign to some value or value. The assignment operator in R is:
r get size of object

[DOCX File]doc.: IEEE 802.11-18/1808r1
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Indicates the minimum frame body size in octets of the first fragment of an MSDU, A-MSDU (if supported), or MMPDU that is supported by the recipient STA. If the Dynamic Fragmentation Support (#15885) subfield is greater than 0: Set to 0 to indicate no minimum frame body size.
data frame length

[DOCX File]doc.: IEEE 802.11-yy/xxxxr0
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Cons: Data size is limited, Data passed via MLME-SAP, More airtime for large data. O. ption . 2: Data transmitted in . eBCS. Info frame. Pros: Unlimited data size, Data passed via MAC-SAP, Less airtime for large data: Cons: More airtime for small data, Receiver has to cache public key. S. traw poll.
r sort dataframe by column

[DOC File]Furman University
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The function dim returns a vector in which the elements are the size of each dimension of the array. Similarly the dim function can be used to transform the dimensions of an array or vector. Let’s turn Monkeys into a 6 by 4 array. ... We can refer to any one column within a dataframe by using the $ between the dataframe name and the column ...
join data frames in r

Tutorial how to use R
An object can be a variable, a vector, a dataframe or a matrix, depending on the amount of data and its structure. Choose a name for an object that is not a name for a function. Some possible names for objects are: a, b, c, x, y, z, data1, data2, matrix1, model1, etc. ... This works fine for small and medium size datasets. For extremely large ...
r find number of rows

[DOCX File]Problem 1 – Asking Price for USEd Cars - Technology
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STAT 425 – Modern Methods of Data Analysis. Assignment 1 – OLS Regression (105 points) Problem 1 – Asking Price for USEd Cars. These data come from a study of the asking price for different makes and models of cars on the used car market.
r dataframe shape

[DOCX File]R arithmetic operations - Boston University
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R is designed to work with vectors very efficiently – avoid using loops to perform the same operation on each element – rather apply function on the whole vector! For large arrays avoid dynamic expansion if …
r dataframe length

R dataframe size