ex_dt_2<-data.table::copy(ex_dt)# Duplicate the datacolnames(ex_dt_2)# Print column names# [1] "a" "b" "c" "d"colnames(ex_dt_2)[2]<-"B_rename"# Rename second column nameex_dt_2 In Table 2 you can see that we have created a second data.table with a new column name ...
data2<-data# Duplicate example datadata2<-tibble::rownames_to_column(data2,"row_names")# Apply rownames_to_columndata2# Print updated data# row_names x1 x2# 1 1 A e# 2 2 B d# 3 3 C c# 4 4 D b# 5 5 E a Note that the rownames_to_column command adds the row_names co...
The set of columns whose names are values, not variables. In this example, those are the columns1999and2000. The name of the variable to move the column names to. Here it isyear. The name of the variable to move the column values to. Here it’scases. Together those parameters generate...
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Here, we're using thecolnames()function to specify new column names. To do this, we're supplying a vector of new variable names:c('numeric_var', 'character_var'). We're using the assignment operator to assign that vector of names as the new "column names." ...
Heatmap(mat, name = "mat", row_order = sort(rownames(mat)), column_order = sort(colnames(mat)), column_title = "reorder matrix by row/column names") 2.5 Seriation包排序 Seriation包是专门用来排序的,(详见: nicolas.kruchten.com/co),一些用法如下: library(seriation) o = seriate(max(mat...
号连接 if (return.neighbor) { paste0(assay, ".", names(x = neighbor.graphs)) # 否则(默认),则使用_连接 } else { paste0(assay, "_", names(x = neighbor.graphs)) } #(A5) 如果 graph.name 长度为1,则提示: 仅提供一个名字,则只保存NN(而不保存SNN) if (length(x = graph.name) =...
[,1]==-1,] # positions of the positive samples pos <- dataframe1[dataframe1[,1]==1,] # replicate the positive samples to balance the sample for (i in 1:20) data.set <- rbind(data.set,pos) row.names(data.set) <- NULL # Return datasets as a Named List return(list(dataset1=...
The figures above give an insight into the volume and richness of data contained in OSM extracts. Even for a small island such as the Isle of Wight, it contains over 50k features including ferry routes, shops and roads. The column names in theosm_linesobject are as follows: ...
The data.frame column names must match the destination table column names.DBI::dbBegin( conn )Begins a transaction by turning off auto-commit.DBI::dbCommit( conn )Commits the current transaction and turns on auto-commit.DBI::dbCreateTable( conn , name , fields , temporary = FALSE)Creates ...