colMedians(x) : Argument ‘x’ must be a matrixrowMedians(data) : Argument ‘x‘ must be a matrix.

Posted 2021-09-18 Data+Science+Insight

colMedians(x) : Argument ‘x’ must be a matrix、rowMedians(data) : Argument 'x' must be a matrix.

目录

colMedians(x) : Argument ‘x’ must be a matrix、rowMedians(data) : Argument 'x' must be a matrix.

问题：

解决：

完整错误：

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问题：

#仿真数据

set.seed(1234)                                          
# Set seed
data <- data.frame(matrix(round(runif(12, 1, 20)),      
# Create example data
                          nrow = 3, ncol = 4))
data                                                    
# Print data to RStudio console

# error

install.packages("robustbase")                               
# Install robustbase package 
library("robustbase")                                        
# Load robustbase package

colMedians(data)                                             
# Error in colMedians
# Error in colMedians(data) : Argument 'x' must be a matrix
 
rowMedians(data)                                             
# Error in rowMedians
# Error in rowMedians(data) : Argument 'x' must be a matrix.

解决：

data_mat <- as.matrix(data)                                  
# Convert data.frame to matrix

colMedians(data_mat)                                         
# No colMedians error anymore
# X1 X2 X3 X4 
# 13 13  5 11


rowMedians(data_mat)                                         
# No rowMedians error anymore
# 7.0 13.5 13.0

完整错误：

# Error in colMedians
# Error in colMedians(data) : Argument 'x' must be a matrix
                                         
# Error in rowMedians
# Error in rowMedians(data) : Argument 'x' must be a matrix.

参考：colSums, rowSums, colMeans & rowMeans in R | 5 Example Codes + Video

参考：statisticsglobe.com

参考：R