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Questions tagged [levels]

491 questions
152
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9 answers

Reorder levels of a factor without changing order of values

I have data frame with some numerical variables and some categorical factor variables. The order of levels for those factors is not the way I want them to be. numbers <- 1:4 letters <- factor(c("a", "b", "c", "d")) df <- data.frame(numbers,…
crangos
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4 answers

Keep unused levels in bar plot

I want to plot unused levels (that is, levels where the count is 0) in my bar-plot, however, unused levels are dropped and I cannot figure out how to keep them df <- data.frame(type=c("A", "A", "A", "B", "B"), group=rep("group1", 5)) df$type <-…
Ulrik
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4 answers

`levels<-`( What sorcery is this?

In an answer to another question, @Marek posted the following solution: https://stackoverflow.com/a/10432263/636656 dat <- structure(list(product = c(11L, 11L, 9L, 9L, 6L, 1L, 11L, 5L, 7L, 11L, 5L, 11L, 4L, 3L,…
Ari B. Friedman
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1 answer

Re-ordering factor levels in data frame

I have a data.frame as shown below: task measure right m1 left m2 up m3 down m4 front m5 back m6 . . . The task column takes only six different values, which are treated as factors, and are ordered by R as: "back", "down",…
siva82kb
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4 answers

How can I drop unused levels from a data frame?

Given the following mock data: set.seed(123) x <- data.frame(let = sample(letters[1:5], 100, replace = T), num = sample(1:10, 100, replace = T)) y <- subset(x, let != 'a') Creating a table of y$let yields a b c d e 0 20 21 22…
Waldir Leoncio
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Why is the terminology of labels and levels in factors so weird?

An example of a non-settable function would be labels. You can only set factor labels when they are created with the factor() function. There is no labels<- function. Not that 'labels' and 'levels' in factors make any sense.... > fac <- factor(1:3,…
IRTFM
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Counting depth or the deepest level a nested list goes to

A have a real problem (and a headache) with an assignment... I'm in an introductory programming class, and I have to write a function that, given a list, will return the "maximum" depth it goes to... For example: [1,2,3] will return 1, [1,[2,3]]…
dhcarmona
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25
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5 answers

Mean by factor by level

Maybe this is simple but I can't find answer on web. I have problem with mean calculation by factors by level. My data looks typicaly: factor, value a,1 a,2 b,1 b,1 b,1 c,1 I want to get vector A contains mean only for level "a" If I type A on…
Bartek Taciak
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2 answers

R- split histogram according to factor level

This is my data: type<-rep(c(0,1),100) diff<-rnorm(100) data<-data.frame(type,diff) If I want to plot historgram of diff, I do this: hist(data$diff) But what I want to do to split my histogram according to type. I could do…
89_Simple
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4 answers

How to change name of factor levels?

training set trainSample <- cbind(data[1:980,1], data[1:980,2]) cl <- factor(c(data[1:980,3])) test set testSample <- data(data[981:1485,1], data[981:1485,2]) cl.test <- clknn prediction k <- knn(trainSample, testSample, cl, k = 5) output < k …
Beginner questions
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16
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7 answers

Remove first levels of identifier in array

I think this has been up before, but could'nt find any answer to it. If it's already answered please point me in the right direction with a link. I have an array that I wan't to remove the first levels of identifier. I think there is a function for…
Fredrik
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What are levels in R?

I understand this is a very basic question but I don't understand what levels mean in R. For reference, I have done a simple script to read CSV table, filter on one of the fields, pass this on to a new variable and clear the memory allocated for the…
ApplePie
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Removing the levels attribute in the output - R

I am new to R Programming. I wrote a sample program and that returns a value of a particular column in a matrix. When I print the value i get something like this [1] APPLE 2 Levels : 1 2 How do I get only the value without the levels in the…
Minions
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4 answers

Recode/relevel data.frame factors with different levels

Each time when I have to recode some set of variables, I have SPSS recode function in mind. I must admit that it's quite straightforward. There's a similar recode function in car package, and it does the trick, but let's presuppose that I want to…
aL3xa
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removing an explicit mandatory label using icacls

I was doing some experimentation with integrity levels and icacls on Windows 7. I set mandatory integrity levels, so that I get something that looks like this: C:\Debug>icacls test.exe test.exe Everyone:(I)(RX) …
chut7
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