This file is indexed.

/usr/share/ncarg/nclex/streamlineplot/st02n.ncl is in libncarg-data 6.3.0-6build1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;                                                                       ;
;                Copyright (C)  1993                                    ;
;        University Corporation for Atmospheric Research                ;
;                All Rights Reserved                                    ;
;                                                                       ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
;   File:       st02n.ncl
;
;   Author:     David Brown
;           National Center for Atmospheric Research
;           PO 3000, Boulder, Colorado
;
;
;   Date:       Wed Apr  3 17:00:55 MST 1996
;
;   Description:   Given a simple mathematically generated data set,
;		   demonstrates line-drawn streamline arrows and the use
;                  of some basic StreamlinePlot resources
;

begin

N=30
M=25
PI=3.14159

;
; Generate vector data arrays
;
 
 
V = 10.0 * cos(onedtond((2.0 * PI / M) * ispan(0,M-1,1),(/N,M/)))
U = 10.0 * cos(onedtond((2.0 * PI / N) * ispan(0,N-1,1),(/M,N/)))
 
;
; We will need to transpose U so dimension names will be needed
;
 
U!0 = "x"
U!1 = "y"

;
; Create an application context. Set the app dir to the current directory
; so the application looks for a resource file in the working directory.
;
appid = create "st02" appClass defaultapp
    "appUsrDir" : "./"
        "appDefaultParent" : True
end create

;
; Default is to display output to an X workstation
;
wks_type = "x11"

if (str_lower(wks_type).eq."ncgm")
;
; Create an NCGM workstation.
;
  wid = create "st02Work" ncgmWorkstationClass defaultapp
    "wkMetaName" : "./st02n.ncgm"
  end create
end if
if (str_lower(wks_type).eq."x11") then
;
; Create an X workstation.
;
  wid = create "st02Work" windowWorkstationClass defaultapp
    "wkPause" : True
  end create
end if
if (str_lower(wks_type).eq."oldps") then
;
; Create an older-style PostScript workstation.
;
  wid = create "st02Work" psWorkstationClass defaultapp
    "wkPSFileName" : "./st02n.ps"
  end create
end if
if (str_lower(wks_type).eq."oldpdf") then
;
; Create an older-style PDF workstation.
;
  wid = create "st02Work" pdfWorkstationClass defaultapp
    "wkPDFFileName" : "./st02n.pdf"
  end create
end if
if (str_lower(wks_type).eq."pdf".or.str_lower(wks_type).eq."ps") then
;
; Create a cairo PS/PDF Workstation object.
;
  wid = create "st02Work" documentWorkstationClass defaultapp
    "wkFileName" : "./st02n"
    "wkFormat" : wks_type
  end create
end if
if (str_lower(wks_type).eq."png") then
;
; Create a cairo PNG Workstation object.
;
  wid = create "st02Work" imageWorkstationClass defaultapp
    "wkFileName" : "./st02n"
    "wkFormat" : wks_type
  end create
end if

;
; Create a VectorField data object using the data set defined above.
; By default the array bounds will define the data boundaries (zero-based,
; as in C language conventions)
;

vfid = create "vfield" vectorFieldClass appid
        "vfUDataArray" : U( y | :, x | :)
	"vfVDataArray" : V
end create

;
; Create a StreamlinePlot object, supplying the VectorField object as data
;

stid = create "streamlineplot" streamlinePlotClass wid
    "tiMainString" : "Modifying StreamlinePlot resources"
    "stVectorFieldData" : vfid
end create

draw(stid)
frame(wid)

; 
; Get the values of several resources that are set dynamically based
; on the assumed NDC size of a grid cell. Each of this will be separately
; modified in the course of this example to illustrate their effect.
;

getvalues stid
  "stStepSizeF" : stepsize
  "stArrowLengthF" : arrowlength
  "stMinLineSpacingF" : spacing
end getvalues

; 
; Increase the step size 
; 

setvalues stid
   "tiMainString" : "Larger Step Size"
   "stStepSizeF" : stepsize * 4.0
end setvalues

draw(stid)
frame(wid)

; 
; Decrease the step size 
; 

setvalues stid
   "tiMainString" : "Smaller Step Size"
   "stStepSizeF" : stepsize * 0.25
end setvalues

draw(stid)
frame(wid)

; 
; Increase the minimum line spacing 
; 

 
setvalues stid
   "tiMainString" : "Larger Minimum Line Spacing"
   "stMinLineSpacingF" : spacing * 4.0
   "stStepSizeF" : stepsize
end setvalues

draw(stid)
frame(wid)

; 
; Decrease the minimum line spacing
; 

setvalues stid
   "tiMainString" : "Smaller Minimum Line Spacing"
   "stMinLineSpacingF" : spacing * 0.25
end setvalues

draw(stid)
frame(wid)

; 
; Increase the line starting grid stride 
; 

setvalues stid
   "tiMainString" : "Larger Line Starting Grid Stride"
   "stMinLineSpacingF" : spacing
   "stLineStartStride" : 3
end setvalues

draw(stid)
frame(wid)


; 
; Decrease the line starting grid stride
; 

setvalues stid
   "tiMainString" : "Smaller Line Starting Grid Stride"
   "stLineStartStride" : 1
end setvalues

draw(stid)
frame(wid)

;
; Increase the arrow size
; 

setvalues stid
   "tiMainString" : "Larger Arrows"
   "stLineStartStride" : 2
   "stArrowLengthF" : arrowlength * 2.0
end setvalues

draw(stid)
frame(wid)

    
;
; Clean up
;

delete(appid)

end