Error when trying to import NetCDF to R -

-

i' struggeling open netcdf file in r. when try open 

library(ncdf) # read in netcdf file maize.nc<-open.ncdf("c:/users/jo/desktop/pft_harvest_maize.nc")

i following error message:

 error in r_nc_open: netcdf: unknown file format  error in open.ncdf("c:/users/jo/desktop/pft_harvest_maize.nc") :     error in open.ncdf trying open file c:/users/jo/desktop/pft_harvest_maize.nc

the weird thing is, netcdf file runoff-data exact same simulation exact same datatype opens without problems.

the difference in filesize runoff: 56.1 mb (58,870,472 bytes) , harvest: 149 mb (156,968,508 bytes). files not big fail when opening. has idea how can trackback error causes problem??

using rnetcdf package same problem (error: netcdf: unknown file format)

from ncdump get:

netcdf pft_harvest_maize { dimensions:         time = 199 ;         npft = 32 ;         latitude = 78 ;         longitude = 79 ; variables:         string namepft(npft) ;         int time(time) ;                 time:units = "years" ;         float latitude(latitude) ;                 latitude:units = "degrees_north" ;                 latitude:long_name = "latitude" ;             latitude:standard_name = "latitude" ;             latitude:axis = "y" ;     float longitude(longitude) ;             longitude:units = "degrees_east" ;             longitude:long_name = "longitude" ;             longitude:standard_name = "longitude" ;             longitude:axis = "x" ;     float harvest(time, npft, latitude, longitude) ;             harvest:units = "gc/m2/yr" ;             harvest:long_name = "harvested carbon" ;             harvest:missing_value = -9999.99f ;             harvest:_fillvalue = -9999.99f  }

the file can found here: netcdf-file

the dump ncdump -k gives netcdf file format netcdf-4. able open file ncdf4 package since ncdf not seem backwards compatible version 4 files:

"however, ncdf package not provide interface netcdf version 4 files."

from ncdf4 documentation.

library(ncdf4) mycdf <- nc_open(file.choose(), verbose = true, write = false) timedata <- ncvar_get(mycdf,'time') lat <- ncvar_get(mycdf,'latitude') long <- ncvar_get(mycdf,'longitude') harvestdata <- ncvar_get(mycdf,'harvest')  str(harvestdata)

gives

num [1:79, 1:78, 1:32, 1:199] na na na na na na na na na na ...

Comments

Post a Comment

Popular posts from this blog

java - Jmockit String final length method mocking Issue -

-
using jmockit 1.2 jar, trying mock string's length method getting unexpected invocation exception: failed: test java.lang.illegalstateexception: missing invocation mocked type @ point; please make sure such invocations appear after declaration of suitable mock field or parameter @ stringdemo.testa$1.<init>(testa.java:17) @ stringdemo.testa.test(testa.java:13) i using testng: @test public void test() throws exception { new expectations() { @mocked("length") string astring; { astring.length(); result = 2; } }; system.out.println(a.showa("test")); } } actual class a: public class { public static int showa(string str){ int a= str.length(); return a; } } this wrong way of recording expected results. shouldn't mock , record string's length() method, record showa() instead. here solution @suppresswarnings("unused...
Read more

What is the difference between data design and data model(ERD) -

-
i have google question , find answer in day. know, data design many many table have list column,and mark pk , fk. why er-diagram have find this? data design process of designing database. main output of data design detailed logical data model of database. some people data design includes of needed logical , physical design choices , physical storage parameters needed generate design in data definition language. technically, database analysis, database analysts (dbas) trained do. while person can both data design , database analysis, these 2 different tasks. data design models data. database analysis takes model , applies 1 or more database engines (relational, hierarchical, nosql). a logical data model 1 of main outputs of data design. data model represented entity relationship diagram, or er diagram.
Read more

ios - Can NSManagedObject conform to NSCoding -

-
i need transfer single object across device. right converting nsmanagedobject dictionary , archiving , sending nsdata. upon receiving unarchiving it. transfer nsmanagedobject archiving , unarchiving instead of creating intermediate data object. @interface test : nsmanagedobject<nscoding> @property (nonatomic, retain) nsstring * title; @end @implementation test @dynamic title; - (id)initwithcoder:(nscoder *)coder { self = [super init]; if (self) { self.title = [coder decodeobjectforkey:@"title"]; //<crash } return self; } - (void)encodewithcoder:(nscoder *)coder { [coder encodeobject:self.title forkey:@"title"]; } @end nsdata *archivedobjects = [nskeyedarchiver archiveddatawithrootobject:testobj]; nsdata *objectsdata = archivedobjects; if ([objectsdata length] > 0) { nsarray *objects = [nskeyedunarchiver unarchiveobjectwithdata:objectsdata]; } the problem above code is. crashes @ self.title in initwithcoder sa...
Read more