去除一些R不能理解的字符(如2,345 转换成 2345,30% 转换成 30),gsub() 将factor转换成number,as.numeric() 如: Circulation2004= as.numeric(gsub(pattern =",", replacement="", x=books$Daily.Circulation..2004))
This tutorial explains how tochange particular values in a data frame to different valuesinthe R programming language. Table of contents: Introduction of Example Data Example 1: Replace Character or Numeric Values in Data Frame Example 2: Replace Factor Values in Data Frame ...
for (i in 1:nrow(cormatrix)){ for (j in 1:ncol(cormatrix)){ if (i>j){cormatrix[i,j]<-cormatrix[j,i]} } } row.names(cormatrix)<-colnames(cormatrix)<-colnames(comm) # if processed using MENAP, OTU order s...
use RColorBrewer and Wes Anderson color palettes use gradient colors Related Book: GGPlot2 Essentials for Great Data Visualization in R Prepare the data ToothGrowth and mtcars data sets are used in the examples below. # Convert dose and cyl columns from numeric to factor variables ToothGrowth$do...
Example 2: Change All R Data Frame Column Names In the second example, I’ll show you how to modify all column names of a data frame with one line of code. First, let’s create another copy of our iris example data set: data_ex2<-iris# Replicate iris data for second example ...
This is a climate-related opportunity because the use of SAF can significantly decrease our emissions, and emissions reductions will be a key factor in our license to operate over the next 30 years, as customer expectations around sustainability grow, and CORSIA regulations to reduce emissions take...
The ArcGIS Enterprise Software Development Kit (SDK) allows developers to extend the functionality of ArcGIS Server map services published via ArcGIS Pro.
Bug fix: spline() could go in an infinite loop in some rare cases. Bug fix: vec() could crash in a specific case with a column vector dataframe. Bug fix: saved() would save dataframe columns as their numeric key value when saving to Excel files. Bug fix: The Package Manager would ...
The elevational distance to the highest mountain summit within the study area was also found to be an important factor in explaining upslope shift rates at the species level: the greater the elevational distance to the highest summit, the more rapidly species shifted their range upslope. This find...
as we assume in the methodology that all gains in net primary productivity translate into a fuel load increase. Part of this potential influence of vegetation modification on the ROS comes from land use change, but it is not the predominant factor (Supplementary Fig.2). A more moderate average...