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[英]Writing a single NCDF4 file with variables extracted from 159 separate NCDF4 files
[英]R - Extracting all variables of ncdf4 file into separate variable names
我正在打開一個 .netcdf 文件,並希望使用非重復方法將所有變量提取到它們自己的變量名中。
目前我可以使用以下方法做到這一點
#route of file we want to open
fn <- "grid_T_19800105.nc"
#opens netCDF file
nc <- nc_open(fn)
#Extracts latitude and longitude matrices into variables
nav_lat <- ncvar_get(nc,"nav_lat")
nav_long <- ncvar_get(nc,"nav_lon")
#Extracts depth levels
depth <- ncvar_get(nc,"deptht")
#Extracts Temperature
votemper <- ncvar_get(nc,"votemper")
#Extracts Salinity
vosaline <- ncvar_get(nc,"vosaline")
#Extracts sea surface height
sossheig <- ncvar_get(nc,"sossheig")
#Extracts ice fraction
soicecov <- ncvar_get(nc,"soicecov")
#Close ncdf file to avoid memory loss
nc_close(nc)
但是似乎有一種更快的方法可以做到這一點。 目前我正在嘗試
#route of file we want to open
fn <- "grid_T_19800105.nc"
#opens netCDF file
nc <- nc_open(fn)
variables <- names(nc$var)
apply(variables,ncvar_get)
但這會返回錯誤
match.fun(FUN) 錯誤:缺少參數“FUN”,沒有默認值
一種可能的解決方案是使用 for 循環:
for(i in 1:length(variables)) {
assign(variables[i], ncvar_get(nc, variables[i]))
}
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