In R, you create a vector with the combine functionc(). You place the vector elements separated by a comma between the parentheses. Once you have created these vectors in R, you can use them to do calculations. numeric_vector<-c(1,10,49)character_vector<-c("a","b","c")#Completet...
y<- c(x,0, x) #1would create a vectorywith 11 entries consisting of two copies ofxwith a zero in #the middle place. 大多数情况下 “<-” 可以用“=”代替 2、向量的计算 向量也可以参与运算,参与运算的向量不必等长,它们会一个元素一个元素的计算。较短的向量会循环拓长,直到和最长的向量长度...
R语言生成仿真vector向量数据、包括数值向量、字符串向量 # create a data frame from scratch age <- c(25, 30, 56) age gender <- c("male", "female", "male") gender weight <- c(160, 110, 220) weight > # create a data frame from scratch > age <- c(25, 30, 56) > ...
In R, youcreate a vector with the combine functionc(). Youplace the vector elements separated(分开)by a comma(逗号) between the parentheses(圆括号). For example: numeric_vector<- c(1, 10, 49) character_vector<- c("a", "b", "c") # Complete the code for boolean_vector boolean_ve...
idx <- c(3,5,6) # create vector of the elements of interest age[idx] 要从向量中选择一系列连续值,我们将使用:哪个是一个特殊函数,它以递增或递减顺序创建整数数字向量。让我们从年龄中选择前四个值: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 age[1:4] 或者,如果您希望反向可以尝试4...
tapply() computes a measure (mean, median, min, max, etc..) or a function for each factor variable in a vector. It is a very useful function that lets you create a subset of a vector and then apply some functions to each of the subset.tapply 和上面的三个就有点不同了，tapply可以将...
myvector <- c("a","b","c") 1. 2,因子 因子是一个枚举类型,用于表示类别。因子有字面标签(Lable)和级别(Level)两个属性。函数factor()以一个整数向量的形式存储类别。 参数:levels代表原始类别名称,lables相当于对类别名称进行重命名。 AI检测代码解析 ...
character vector指定标签 limits:指定刻度范围 trans:轴转换,可以使用 “log2”, “log10”, … 下面是示例: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 # Change x and y axis labels,and limits sp+scale_x_continuous(name="Speed of cars",limits=c(0,30))+scale_y_continuous(name="Stoppi...
make_clean_names(): Pipe-friendly function to make syntactically valid column names (for input data frame) or names (for input vector). 安装和加载 从GitHub上安装开发版本: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 if(!require(devtools)) install.packages("devtools") devtools::install_...
# split by a vector specifying row classes, 有点类似于ggplot2里的分面 Heatmap(df, name = "mtcars", col = mycol, split = mtcars$cyl ) #split也可以是一个数据框,其中不同级别的组合拆分热图的行。 # Split by combining multiple variables ...