Question

以this file为例，我正在尝试读取data.frame中的数据。从the doc（pdf文件，表1），它遵循一些fortran惯例。我尝试了以下几点但收效甚微：

dir <- "Uncompressed-files/"
file <- "01_hit09.par"

delim <- c("I2", "I1", "F12.6", "E10.3", "E10.3", "F5.4", "F5.4", 
"F10.4", "F4.2", "F8.6", "A15", "A15", "A15", "A15", "6I1", "6I2", 
"A1", "F7.1", "F7.1")
test <- read.fortran(paste0(dir, file), delim)

test <- read.fwf(paste0(dir, file),
                 c(2, 1, 12, 10, 10, 5, 5, 10, 4, 8,
                   15, 15, 15, 15, 6, 12, 1, 7, 7))

指定正确格式的提示吗？

Answer 1

根据?read.fortran：

"E"不支持格式。
“以'F'或'D'格式指定'd＆gt; 0'将改变小数“d”位于左侧，即使它是明确的在输入文件中指定。“

所以将"E"更改为"F"并删除所有显式小数格式：

file <- "01_hit09.par"
delim <- c("I2", "I1", "F12", "F10", "F10", "F5", "F5", "F10", "F4", "F8",
           "A15", "A15", "A15", "A15", "6I1", "6I2", "A1", "F7", "F7")
(test <- read.fortran(file, delim, n=10))

更新：或者正确指定宽度并使用read.fwf：

 test2 <- read.fwf(file, c(2,1,12,10,10,5,5,10,4,8,15,15,15,15,
                           rep(1,6),rep(2,6),1,7,7), as.is=TRUE)

阅读HITRAN文件格式

1 个答案: