? How To Calculate Mean In R (Data Structure)

I have a data structure in R like so:> tkr[[i, 4]][1] 81.3> tkr[[i - 1, 4]][1] 82.59> tkr[[i - 2, 4]][1] 80.69> tkr[[i - 3, 4]][1] 79.76> tkr[[i - 4, 4]][1] 81.19> tkr[[i - 5, 4]][1]
 ? K means clustering of variable with multiple values

I have a sample data below that is from a large data set, where each participant is given multiple condition for scoring.Participant<-c("p1","p1","p2","p2","p3","p3")Condition<-c( "c1","c2","c1
 ? How to pull points that are within a certain distance away in R?

I have a parameter space given by (x,y) with x values from 1:5 and y values from 1:8. Let's say my current point p is located at (2,5) (it is colored in red). My goal is to try to pull all the points
 ? Aggregate / summarize multiple variables per group (i.e. sum, mean, etc)

From a data frame, is there a easy way to aggregate (i.e. sum) multiple variables simultaneously?Below are some sample data:require(lubridate)days = 365*2date = seq(as.Date("2000-01-01"), length = day
 ? How to find the mean of a variable for every value of another variable?

I'm new here, so pardon such a basic question, but I just started R and I've been asked a question that's left me stumped:Using the pre-installed dataset in R, mtcars, I'm supposed to find the mean of
 ? Mean of columns with ddply without considering 0 values

so I have a data frame with Dates and Values as columns.I found a code that calculates the mean of all Values with the same Date. MeanValues = ddply(df, .(Date), summarize, Values = mean(Values))Now m
 ? How to average every 12 columns for each row in r

This question already has an answer here: apply a function over groups of columns 6 answers For each row r, app
 ? means of vectors in dataframe by factor

I am trying to create a new dataframe that is a condensed version of a series of vectors. while my data is built something like mat <- matrix(1:18, 6) g <- c("a", "a", "b", "b", "c", "c")df <
 ? Weighted Average in R using NA weights

a=c(1,2,NA,4) b=c(10,NA,30,40) weighted.mean(a,b,na.rm = T)The above code gives me NA as the answer, I think na.rm only ignores the NA values in vector a and not b. How can I ignore the NA in vector b
 ? Is it possible to aggregate or summarize dataset in R with median?

I am trying to aggregate dataset in R with median.d <- aggregate(c(d$user_reported_percent, d$machine_percent), by = list(d$day), FUN=median, simplify = TRUE, drop = TRUE)But
 ? Change Median Color geom_boxplot

This question already has an answer here: Change color median line ggplot geom_boxplot() 1 answer if you want t
 ? Order column names in ascending order within dplyr chain

I have this data.frame:df <- structure(list(att_number = structure(1:3, .Label = c("0", "1", "2"), class = "factor"), `1` = structure(c(2L, 3L,

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