でnetCDFファイルを開いてR
、ヘッダー情報を確認しました。その後gdalinfo
、同じファイルのヘッダー情報を確認していました。
gdalinfo
私が見つけたのは、 (時間の原点、単位など)によって示されるはるかに多くの情報があるということです。NetCDFファイル内の変数の詳細を把握するコマンドはありますR
か?
f=open.ncdf("C:\\BR_Ban.nc")
> f
[1] "file C:\\GF_Guy_6Y.nc has 4 dimensions:"
[1] "x Size: 1"
[1] "y Size: 1"
[1] "land Size: 1"
[1] "tstep Size: 105120"
[1] "double nav_lon[x,y] Longname:Longitude Missval:1e+30"
[1] "double nav_lat[x,y] Longname:Latitude Missval:1e+30"
[1] "float time[tstep] Longname:Time axis Missval:1e+30"
[1] "float timestp[tstep] Longname:Time step axis Missval:1e+30"
Then read one variable
A = get.var.ncdf(nc=f,varid="time",verbose=TRUE)
[1] "vobjtodimname: is a character type varid. This file has 6 dims"
[1] "vobjtodimname: no cases found, returning FALSE"
[1] "get.var.ncdf: isdimvar: FALSE"
[1] "vobjtovarid: entering with varid=date"
[1] "Variable named date found in file with varid= 7"
[1] "vobjtovarid: returning with varid deduced from name; varid= 7"
[1] "get.var.ncdf: ending up using varid= 7"
[1] "ndims: 2"
[1] "get.var.ncdf: varsize:"
[1] 3 52560
[1] "get.var.ncdf: start:"
[1] 1 1
[1] "get.var.ncdf: count:"
[1] 3 52560
[1] "get.var.ncdf: totvarsize: 157680"
[1] "Getting var of type 3 (1=short, 2=int, 3=float, 4=double, 5=char, 6=byte)"
[1] "get.var.ncdf: C call returned 0"
[1] "count.nodegen: 3 Length of data: 157680" "count.nodegen: 52560 Length of data: 157680"
[1] "get.var.ncdf: final dims of returned array:"
[1] 3 52560