# Write a function to convert sq. meters to hectaressq_meters_to_hectares <-function(sq_meters){ sq_meters /10000}# Write a function to convert acres to sq. yardsacres_to_sq_yards <-function(acres){4840* acres }
write.table(object, file="filename", quote=F,row.names=F, col.names=T, sep='\t') 其中quote设置字符型元素是否用引号引起来。 对于图片,我们更推荐直接使用Rstudio的图形界面输出图片。在脚本中可以使用pdf()函数直接保存图片,如下所示: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 pdf("practi...
# 4. evaluate(function(x){x+1}, 6) 会得到x=6时 function(x){x+1}的结果,也就是7 # 5. evaluate(function(x){x[length(x)]},c(8,4,0))会得到c(8,4,0)的最后一个数,也就是0 # 6. evaluate(function(x){x[1]},c(8,4,0)) 会得到c(8,4,0)的第一个数,也就是8 function里...
(a) Download the data trnormal.dat from the G3 Moodle page. Read it into R using scan. (b) Obtain summary statistics for the data and plot a histogram. (c) Write a function called negll that takes two arguments (i) params, a vector containing the values of the two parameters (µ...
【解析】 Simplify $$ \sqrt { \frac { A } { 4 \pi } } $$. $$ r = \frac { \sqrt { A \pi } } { 2 \pi } $$ To reurite as a function of A, write the equa tion so that, is by itself on one side of the equal sign and an expression involving only A is on ...
Write the following functions: makeCacheMatrix: This function creates a special "matrix" object that can cache its inverse. cacheSolve: This function computes the inverse of the special "matrix" returned bymakeCacheMatrixabove. If the inverse has already been calculated (and the matrix has not cha...
make_plot <- function(data,x,y,z){ ggplot(data,aes(x={{x}},y={{y}},fill={{x}}))+ geom_violin(trim=F)+ stat_boxplot(geom="errorbar",position=position_dodge(width=0.2),width=0.1)+ geom_boxplot(position=position_dodge(width =0.8),width=0.1,fill="white")+ scale_fill_manual...
Write a function called circle that takes a scalar input r. It needs to return an output called area that is the area of a circle with radius r and a second output, cf that is the circumference of the same circle. You are allowed to use the b...
write.csv(f, "R11.csv", row.names = F) #将f的内容写入R11中;row.names=F 表示不把行名称读进去;sep="\t" 表示以tab(制表符\t)为分隔符 remove(list = ls()) #清除全部对象,即用ls()列出全部对象名,用一个list将全部对象装进里面,rm()全部清除 ...
functional_widgets, is an attempt to solve this issue, using a code generator. Simply write your widget as a function, decorate it with a@swidget, and then this library will generate a class for you to use. As the added benefit, you also get for free the ability to inspect the paramet...