在R中将字符串转换为表

我对R完全不熟悉，我正在制作一个程序，用一个字符串来解方程组，例如：

my_string <- "3x+2y=0; -1x+4y=-1; 13x-2y=11" 

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提前谢谢。

您应该使用

strsplit

根据逗号进行拆分，然后将其转换为数值

vals <- as.numeric(strsplit(my_string, ",")[[1]])
x <- matrix(vals, ncol=3,nrow=3,byrow=TRUE)
x
#      [,1] [,2] [,3]
# [1,]    3    2    0
# [2,]   -1    4   -1
# [3,]   13   -2   11

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vals您可以使用
scan
解析文件或字符向量中的分隔值

matrix(scan(text = my_string, sep = ",", what = 1L), ncol = 3, byrow = TRUE)
#Read 9 items
#     [,1] [,2] [,3]
#[1,]    3    2    0
#[2,]   -1    4   -1
#[3,]   13   -2   11

vals <- as.numeric(strsplit(my_string, ",")[[1]])
x <- matrix(vals, ncol=3,nrow=3,byrow=TRUE)
x
#      [,1] [,2] [,3]
# [1,]    3    2    0
# [2,]   -1    4   -1
# [3,]   13   -2   11

matrix(scan(text = my_string, sep = ",", what = 1L), ncol = 3, byrow = TRUE)
#Read 9 items
#     [,1] [,2] [,3]
#[1,]    3    2    0
#[2,]   -1    4   -1
#[3,]   13   -2   11