(sum(!is.na(x))) – count of non-missing values This area discusses popular functions used in RStudio (sum(!is.na(x))) – count of non-missing values ggplot(data = mpg) + geom_point(mapping = aes(x = displ, y = hwy, color = class)) as.character() changes type to be character as.integer() changes type to be integer as.numeric() c() creates a vector c() creates a vector (concatenate, combine) class() returns objects […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-854","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n
\nggplot(data = mpg) + geom_point(mapping = aes(x = displ, y = hwy, color = class))
\nas.character() changes type to be character
\nas.integer() changes type to be integer
\nas.numeric()
\nc() creates a vector
\nc() creates a vector (concatenate, combine)
\nclass() returns objects type > class(1) [1] “numeric”
\ndata() view available datasets
\nexp() computes the exponential function
\nfilter() subset observations based on values
\nggplot() ggplot(data = ) +
\nhead() first 6 lines
\nhelp()
\ninstall.packages
\nis.vector(x) returns TRUE if x is a vector
\nlength() – how many entries are in the vector
\nlibrary() loads library into workspace (must be installed first)
\nlog(x, base)
\nls() list variables assigned in workspace
\nmatch() tells which indexes of vector B match each of the entries of vector A:
\nmax() largest value
\nmean() calculates the average of all vector elements
\nmin()
\nmutate(),
\nnames() gives names to values in a vector so they can be referenced by name
\nnrow(), number of rows
\norder() returns the vector of indexes (helpful w\/ a sorted vector)
\nrank() returns a vector with the rank of the entries (1st, 2nd, etc)
\nrm() remove from workspace
\nseq(1,10,2) creates vector from 1 to 10 jump by 2 > [1] 1 3 5 7 9
\nsort() sorts from least to most
\nsqrt() square root of a value
\nstr() – displays structure of object
\nsum(x, y, z) adds llist of numbers
\ntable() takes a vector and returns the frequency of each element.
\ntail(x, 1), last element of a vector
\nView() displays object as a spreadsheethttps:\/\/rstudio-education.github.io\/hopr\/preface.html#acknowledgments
\nwhich.max() for the index of the largest value
\nwhich.min()
\nwhich() convert vectors of logicals into indexes – tells which entries are TRUE.
\nwith(data, expr, …) Evaluate data with an expression<\/p>\n","protected":false},"excerpt":{"rendered":"