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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hello,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I would like to compare two sets of forcing data. One is in a .grb file while the other is a .txt. When working the GRIB files (1 hour timesteps), I would like my .ncl script to reads in a time series of data, with the goal to plot specific weather data variables from specific locations to compare the .txt files. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>However, when running my .ncl script listed below I receive a Segmentation fault error. I’m not sure if this is because I am not defining the latitude and longitude coordinates soon enough, causing an error by reading in too much data. I do not know how to print or plot specific latitude (48.5625) and longitude (-98.9375) points and print their forcing variables. Could you please help improve my .ncl script? I have also uploaded an example of the .grb files I am working with. Thank you for your time.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>begin<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>;Go to directory of interest <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>diri = ncargpath("/depot/phig/apps/LIS_VIC/NLDAS_Forcing/discover/nobackup/projects/lis/MET_FORCING/NLDAS2.FORCING/2009/075/")<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>;list names of all of the files and add ful file path<o:p></o:p></p><p class=MsoNormal>grb_list = systemfunc("ls "+diri+"NLDAS_FORA0125_H.*.002.grb") <o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>;print(grb_list) ; make sure the desired files are listed in the correct order<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>; read in all files<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>grb_file = addfiles("grb_list","r")<o:p></o:p></p><p class=MsoNormal>ListSetType (grb_file, "join")<o:p></o:p></p><p class=MsoNormal>data = grb_file[:]->DSWRF_110_SFC<o:p></o:p></p><p class=MsoNormal>data@lat=grb_file[:]->lat_110 ;Lat. of interest 48.5625<o:p></o:p></p><p class=MsoNormal>data@lon=grb_file[:]->lon_110 ;Lon. of interest -98.9375<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>print(data)<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>end<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Regards,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>-Stuart <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>