[ncl-talk] Loops: CALIPSO backscatter plot

[Dennis Shea]

dir_name  =
"/Users/srishtidasarathy/Documents/Bowman/CALIPSO_Data_Processing/Backscatter_Test_Data/"

file_name = systemfunc("cd "+dir_name+" ls
"CAL_LID_L2_05kmAPro-Prov-V3-0*hdf")
nfile          = fimsizes(file_name)

; Is there a different file for each hdf or just one file???
altitudes.txt"
If one file than there is no need to loop.

;;dir_txt =
"/Users/srishtidasarathy/Documents/Bowman/CALIPSO_Data_Processing/Backscatter_Test_Data/"
;;txt_name = systemfunc("cd "+dir_asc+" ls altitude........txt")

do nf=0,nfile-1
     hdf4_file = addfile(dir_name+file_name(nf), "r")
   ;;text_file = asciiread(dir_txt+txt_name(nf)....)

     ...
end do

Please note: any variable that may change size would require NCL's
over-write/replacement syntax: :=

     x *:=* .....

On Wed, Oct 17, 2018 at 3:59 PM Srishti Dasarathy <srdasara at ucsd.edu> wrote:

> Dear NCL-Talk,
>
> I want to construct a loop in which I am able to access a directory of hdf
> files to construct a total backscatter coefficient plot. I've been able to
> construct the plot with a single hdf file (text file attached), but I'm
> unsure how to proceed.
>
> The main challenge to me is that I've been able to extract all necessary
> altitude text files into a separate directory, since I was not able to
> access the altitude values straight from the hdf file within NCL itself.
> Because of this, my understanding is that the altitude text files should be
> simultaneously looped through as my hdf files are being looped through in
> order to construct the backscatter plot. Can you please help me with this?
>
> Best wishes,
> Srishti
> --
> Srishti Dasarathy
> Graduate Student
> Scripps Institution of Oceanography
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