[gradsusr] Read binary files written from R

Sujata Mandke amin at tropmet.res.in
Wed Apr 11 08:36:44 EDT 2018


Hello!

   Please check if value of undefine is correct. 
That could create problem such as you mentioned.

with best regards
Dr. Sujata Mandke
scientist, Indian Institute of Tropical Meteorology
PUNE, INDIA

----- Original Message -----
From: Kiswendsida Hyacinthe Guigma <K.Guigma at sussex.ac.uk>
To: gradsusr at gradsusr.org
Sent: Tue, 10 Apr 2018 17:18:39 +0530 (IST)
Subject: [gradsusr] Read binary files written from R

Hi everyone!
I have some meteorological data that I processed using R and I would like to plot them in Grads. Then, I wrote binary files from R and I took time to check that they are well written in the right order. I also wrote a control file. GrADS is able to read the file but it gives so bad values. When I try to display them for example, I get my data range and it is completely different from what I have in R. Actually my data in R span from -0.005 to 0.05 while in Grads I get -5e+37 to 3e+38 !!!
This is my control file code:

DSET    /home/k/kg/kg312/eof.dat
TITLE   EMPIRICAL ORTHOGONAL FUNCTIONS
UNDEF   -99999
XDEF 61 LINEAR -20.5 1
YDEF 12 LINEAR 5.5 1
ZDEF 1 LINEAR 1 1
TDEF 1 LINEAR 16FEB2018 1DY
VARS 1
EOF1 1 99 EOF1
ENDVARS

I thought the problem could be due to a byte swapping. Then I included successively all of the OPTIONS related to that: byteswapped, little_endian and big_endian but none of them solved my problem. 
Both my R and Grads are run on the same machine on Apollo HPC. I used Grads Version 2.1.0 and  Version 2.0.1.oga.1. The R version is R3.4.0 . 

Any help is appreciated!

GUIGMA
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