sum_value <- sum(data$column_name)这将计算"column_name"列的总和，并将结果存储在名为"sum_value...
你可以使用 `sum()` 函数。假设你有一个数据框 `df`，其中包含列 `column_name`，你可以像这样计算...
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The sum() function in R to find the sum of the values in the vector. This tutorial shows how to find the sum of the values, the sum of a particular row and column, and also how to get the summation value of each row and column in the dataset. ...
For vectors, RCUMSUM(X) is a vector containing the cumulative sum of the elements of X, with the summation restarting after a zero is encountered. For matrices, RCUMSUM(X) is a matrix the same size as X containing the cumulative restarted sums over each column. For N-D arrays, RCUMSUM...
adjust_pvalue(): add an adjusted p-values column to a data frame containing statistical test p-values add_significance(): add a column containing the p-value significance level 其他 doo(): alternative to dplyr::do for doing anything. Technically it usesnest() + mutate() + map()to apply...
Example 2: Replace Multiple Values in Particular Columns of Data FrameExample 2 explains how to replace values only in specific columns of a data frame.For this, we first have to specify the columns we want to change:col_repl <- c("x2", "x3") # Specify columns col_repl # Print ...
2.1.364 Part 1 Section 17.14.7, column (Index of Column Containing Unique Values for Record) 2.1.365 Part 1 Section 17.14.9, dataSource (Data Source File Path) 2.1.366 Part 1 Section 17.14.12, doNotSuppressBlankLines (Remove Blank Lines from Merged Documents) 2.1.367 Part 1 Section 17....
(sum((ts - mean(ts))^2))/(ts.length - 1) ts <- ts/stdev}, error = function(e){warning(messages[6]); zerovec}) ts } ## Apply the detrend.ts function to the variables of interest df.detrend <- data.frame(lapply(cadairydata[, 4:7], ts.detrend, cadairydata$Time)) ## ...