GNU Data Language (GDL) a free and open-source implementation ...

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About GDL: some pros and cons • inherited from IDL: • one can process data and get customized plots of them with a few (dozens) lines of code • opens many data formats: text, binary, netCDF, HDF, FITS, GRIB. . . • GDL specific: • it’s free! and you can modify and expand it to suit your needs • numerics based on reliable open-source libraries as (GSL, FFTW, . . . ) • enhanced CLI thanks to readline, SVG & GRIB support, Python bridge • compiles on many platforms (Linux, BSDs, OSX, Solaris, Cygwin, ...) Sylwester Arabas, Alain Coulais & Takeshi Enomoto GNU Data Language 7/ 34
About GDL: some pros and cons • inherited from IDL: • one can process data and get customized plots of them with a few (dozens) lines of code • opens many data formats: text, binary, netCDF, HDF, FITS, GRIB. . . • GDL specific: • it’s free! and you can modify and expand it to suit your needs • numerics based on reliable open-source libraries as (GSL, FFTW, . . . ) • enhanced CLI thanks to readline, SVG & GRIB support, Python bridge • compiles on many platforms (Linux, BSDs, OSX, Solaris, Cygwin, ...) • inherited from IDL: • bit archaic syntax with constructs from numerous languages from Fortran to C++ and inconsistent naming of library routines . . . but who cares, it’s meant to be more a bash than a Java of scientific computing – it’s intended for short scripts and interactive usage Sylwester Arabas, Alain Coulais & Takeshi Enomoto GNU Data Language 7/ 34
Page 1 and 2: GNU Data Language (GDL) a free and
Page 3 and 4: efore we begin with GDL: what’s I
Page 5 and 6: IDL in Astronomy • The situation
Page 7 and 8: About GDL: the project and its auth
Page 13: About GDL: some pros and cons • i
Page 17 and 18: About GDL: known users • people a
Page 25 and 26: About GDL: known users ...? • peo
Page 27 and 28: About GDL: how we use it • @ the
Page 29 and 30: About GDL: how others use it • At
Page 31 and 32: About GDL: how others use it • At
Page 33 and 34: Sylwester Arabas, Alain Coulais & T
Page 45 and 46: About GDL: how to get GDL • pre-c
Page 47 and 48: About GDL: how to get GDL • pre-c
Page 49 and 50: About GDL: how to help and contribu
Page 51 and 52: Hands-on: let’s start $ gdl GDL>
Page 53 and 54: Hands-on: CReSS-SDM example 1 pro c
Page 55 and 56: NCDF OPEN & NCDF VARGET NCDF OPEN()
Page 57 and 58: WHERE, ARRAY INDICES & REFORM WHERE
Page 59: Sylwester Arabas, Alain Coulais & T

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