NCAR Command Language - Programming language

NCAR Command Language, aka NCAR Command Language, is an open source programming language created in 1994.

#503on PLDB

30Years Old

654Repos

Download source code:

git clone https://github.com/NCAR/ncl

(The NCAR Command Language (NCL), a product of the Computational & Information Systems Laboratory at the National Center for Atmospheric Research (NCAR) and sponsored by the National Science Foundation, is a free interpreted language designed specifically for scientific data processing and visualization.

Tags: programming language, weather
NCAR Command Language is developed on GitHub and has 258 stars
There are at least 654 NCAR Command Language repos on GitHub
Early development of NCAR Command Language happened in University Corporation for Atmospheric Research
NCAR Command Language is written in FORTRAN 77, C, Objective-C, MATLAB, MUMPS, C shell, Rescript, sed, Mathematica, Bourne shell, Fortran 90, Python, XML, Perl, Make, Markdown, Lex, Java, YAML, Korn shell, Yacc, CSV, XSLT, Ini, Diff, Visual Basic
The Google BigQuery Public Dataset GitHub snapshot shows 61 users using NCAR Command Language in 64 repos on GitHub
Pygments supports syntax highlighting for NCAR Command Language
GitHub supports syntax highlighting for NCAR Command Language

Example from the web:

;-----------------------------------------------------------------
;  NCL User Guide Example:   NUG_bar_chart.ncl
;
;  KMF 30.10.14
;-----------------------------------------------------------------
; These load commands are not required in NCL versions 6.2.0 and later.
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"

begin

   low  =  0.0
   high =  1.0

   n = 12

   x = fspan(1.0, 12.0, n)
   y = random_uniform(low, high, n)

   wks = gsn_open_wks("png","NUG_bar_chart")

   res                       =  True
   res@gsnXYBarChart         =  True
   res@gsnXYBarChartBarWidth =  0.3
   res@gsnXYBarChartColors   = "blue"

   res@trXMinF               =  0.0              ;-- x-axis min value
   res@trXMaxF               = 13.0              ;-- x-axis max value
   res@trYMinF               =  0.0              ;-- y-axis min value
   res@trYMaxF               =  1.0              ;-- y-axis max value

   res@tmXBMode              = "Explicit"        ;-- explicit labels
   res@tmXBValues            =  ispan(1,12,1)
   res@tmXBLabels            = (/"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep", \
                                 "Oct","Nov","Dec"/)
   res@tmXBLabelFontHeightF  =  0.015

   res@tiMainString          = "NCL Doc Example: bar chart"

   plot = gsn_csm_xy(wks, x, y, res)

end

Example from Linguist:

val=102
a=val/4.
print(a)

Language features

Feature	Supported	Example	Token
Comments	✓	; A comment
Line Comments	✓	; A comment	;
Semantic Indentation	X