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spectra.ncl @ 3609

Last change on this file since 3609 was 2837, checked in by gronemeier, 7 years ago
palmplot: config file of ncl scripts can be chosen in shell command
File size: 24.4 KB

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1	load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
2	load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
3	load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"
4
5	;***************************************************
6	; Checking the kind of the script
7	;***************************************************
8
9	function which_script()
10	local script
11	begin
12	script = "spectra"
13	return(script)
14	end
15
16	;***************************************************
17	; Retrieving the NCL version used
18	;***************************************************
19
20	ncl_version_ch = systemfunc("ncl -V")
21	ncl_version = stringtofloat(ncl_version_ch)
22
23	;***************************************************
24	; Function for checking file existence in dependence
25	; on NCL version
26	;***************************************************
27
28	function file_exists(version:string,file_name:string)
29	begin
30	if( version .GE. "6.2.1" ) then
31	existing = fileexists(file_name)
32	else
33	existing = isfilepresent(file_name)
34	end if
35	return(existing)
36	end
37
38	;***************************************************
39	; load .ncl.config or .ncl.config.default
40	;***************************************************
41
42	existing_file = file_exists(ncl_version_ch,file_config)
43	if (existing_file) then
44	loadscript(file_config)
45	else
46	palm_bin_path = getenv("PALM_BIN")
47	print(" ")
48	print("Neither the personal configuration file '.ncl.config' exists in")
49	print("~/palm/current_version")
50	print("nor the default configuration file '.ncl.config.default' "+\
51	"exists in")
52	print(palm_bin_path + "/NCL")
53	print(" ")
54	exit
55	end if
56
57
58	begin
59
60	;***************************************************
61	; Retrieving the double quote character
62	;***************************************************
63
64	dq=str_get_dq()
65
66	;***************************************************
67	; set up default parameter values and strings
68	;***************************************************
69
70	if (file_1 .EQ. "File in") then
71	print(" ")
72	print("Declare input file 'file_1=' in '.ncl.config' or prompt")
73	print(" ")
74	exit
75	else
76	file_in = file_1
77	end if
78
79	if (format_out .NE. "x11" .AND. format_out .NE. "pdf" .AND. \
80	format_out .NE. "eps" .AND. format_out .NE. "ps" .AND. \
81	format_out .NE. "epsi" .AND. format_out .NE. "ncgm" .AND. \
82	format_out .NE. "png")then
83	print(" ")
84	print("'format_out = "+format_out+"' is invalid and set to'x11'")
85	print(" ")
86	format_out="x11"
87	end if
88
89	if (ncl_version .LE. 5.1 .AND. format_out .EQ. "png") then
90	print(" ")
91	print("Output of png files not available")
92	print("png output is avaiable with NCL version 5.2.0 and higher ")
93	print("NCL version used: " + ncl_version_ch)
94	print(" ")
95	exit
96	end if
97
98	if (log_x .NE. 0 .AND. log_x .NE. 1)then
99	print(" ")
100	print("'log_x'= "+log_x+" is invalid and set to 1")
101	print(" ")
102	log_x = 1
103	end if
104
105	if (log_y .NE. 0 .AND. log_y .NE. 1)then
106	print(" ")
107	print("'log_y'= "+log_y+" is invalid and set to 1")
108	print(" ")
109	log_y = 1
110	end if
111
112	if (norm_y .EQ. 0.) then
113	print(" ")
114	print("Normalising with 0 is not allowed, 'norm_y' is set to 1.0")
115	print(" ")
116	norm_y = 1.0
117	end if
118	if (norm_x .EQ. 0.) then
119	print(" ")
120	print("Normalising with 0 is not allowed, 'norm_x' is set to 1.0")
121	print(" ")
122	norm_x= 1.0
123	end if
124
125	if (sort .NE. "height" .AND. sort .NE. "time") then
126	print(" ")
127	print("'sort'= "+sort+" is invalid and set to 'height'")
128	print(" ")
129	sort = "height"
130	end if
131
132	if (black .NE. 0 .AND. black .NE. 1)then
133	print(" ")
134	print("'black'= "+black+" is invalid and set to 0")
135	print(" ")
136	black = 0
137	end if
138
139	if (dash .NE. 0 .AND. dash .NE. 1)then
140	print(" ")
141	print("'dash'= "+dash+" is invalid and set to 0")
142	print(" ")
143	dash = 0
144	end if
145
146	;***************************************************
147	; open input file
148	;***************************************************
149
150	file_in_1 = False
151	if (isStrSubset(file_in, ".nc"))then
152	start_f = -2
153	end_f = -2
154	file_in_1 = True
155	end if
156
157	if (start_f .EQ. -1)then
158	print(" ")
159	print("'start_f' must be one of the cyclic numbers (at least 0) of "+\
160	"your input file(s)")
161	print(" ")
162	exit
163	end if
164	if (end_f .EQ. -1)then
165	print(" ")
166	print("'end_f' must be one of the cyclic numbers (at least 0) of "+\
167	"your input file(s)")
168	print(" ")
169	exit
170	end if
171
172	files=new(end_f-start_f+1,string)
173
174	if (file_in_1)then
175	if (isfilepresent(file_in))then
176	files(0)=file_in
177	else
178	print(" ")
179	print("1st input file: '"+file_in+"' does not exist")
180	print(" ")
181	exit
182	end if
183	else
184	if (start_f .EQ. 0)then
185	if (isfilepresent(file_in+".nc"))then
186	files(0)=file_in+".nc"
187	do i=1,end_f
188	if (isfilepresent(file_in+"."+i+".nc"))then
189	files(i)=file_in+"."+i+".nc"
190	else
191	print(" ")
192	print("Input file: '"+file_in+"."+i+".nc' does not exist")
193	print(" ")
194	exit
195	end if
196	end do
197	else
198	print(" ")
199	print("Input file: '"+file_in+".nc' does not exist")
200	print(" ")
201	exit
202	end if
203	else
204	do i=start_f,end_f
205	if (isfilepresent(file_in+"."+i+".nc"))then
206	files(i-start_f)=file_in+"."+i+".nc"
207	else
208	print(" ")
209	print("Input file: '"+file_in+"."+i+".nc' does not exist")
210	print(" ")
211	exit
212	end if
213	end do
214	end if
215	end if
216
217	f=addfiles(files,"r")
218	f_att=addfile(files(0),"r")
219	ListSetType(f,"cat")
220
221	vNam = getfilevarnames(f_att)
222	if( ncl_version .GE. 6.1 ) then
223	vNam = vNam(::-1)
224	end if
225	vType = getfilevartypes(f_att,vNam)
226
227	if ((all(vType .eq. "double"))) then ;distinction if data is double or float
228	check_vType = True
229	else
230	check_vType = False
231	end if
232
233	print(" ")
234	print("Variables in input file:")
235	print("- "+ vNam)
236	print(" ")
237	dim = dimsizes(vNam)
238	vDim = getfiledimsizes(f_att)
239
240	t_all = f[:]->time
241	nt = dimsizes(t_all)
242
243	if (nt .EQ. 1)then
244	delta_t=t_all(nt-1)/nt
245	else
246	delta_t_array = new(nt-1,double)
247
248	do i=0,nt-2
249	delta_t_array(i) = t_all(i+1)-t_all(i)
250	end do
251
252	delta_t = min(delta_t_array)
253	delete(delta_t_array)
254	end if
255
256	k_x=f_att->k_x
257	dimx=dimsizes(k_x)
258	k_y=f_att->k_y
259	dimy=dimsizes(k_y)
260
261
262	dim_level=dimsizes(height_level)
263
264	do i=0,dim-1
265	if (vNam(i) .EQ. "zu_sp")then
266	zu=f_att->zu_sp
267	if (height_level(0) .EQ. -1)then
268	dimz=dimsizes(zu)
269	else
270	if (dim_level .GT. dimsizes(zu))then
271	print(" ")
272	print("'height_level' has more elements than available "+\
273	"height levels in input file (= "+dimsizes(zu)+")")
274	print(" ")
275	exit
276	else
277	zuh=new(dim_level,double)
278	do le=0,dim_level-1
279	if (height_level(le) .GE. dimsizes(zu)) then
280	no_levels=dimsizes(zu)-1
281	print(" ")
282	print("Element "+le+" of 'height_level' is greater " +\
283	"than the maximum available index in input file "+\
284	"which is "+no_levels+". Note that the first " +\
285	"element has the index 0.")
286	print(" ")
287	exit
288	end if
289	zuh(le)=zu(height_level(le))
290	end do
291	dimz=dim_level
292	end if
293	end if
294	else
295	if (vNam(i) .EQ. "zw_sp")then
296	zw=f_att->zw_sp
297	if (height_level(0) .EQ. -1)then
298	dimz=dimsizes(zw)
299	else
300	if (dim_level .GT. dimsizes(zw))then
301	print(" ")
302	print("'height_level' has more elements than available "+\
303	"height levels in input file (= "+dimsizes(zw)+")")
304	print(" ")
305	exit
306	else
307	zwh=new(dim_level,double)
308	do le=0,dim_level-1
309	if (height_level(le) .GE. dimsizes(zw)) then
310	no_levels=dimsizes(zw)-1
311	print(" ")
312	print("Element "+le+" of 'height_level' is greater "+\
313	"than the maximum available index in input " +\
314	"file which is "+no_levels+". Note that the " +\
315	"first element has the index 0.")
316	print(" ")
317	exit
318	end if
319	zwh(le)=zw(height_level(le))
320	end do
321	dimz=dim_level
322	end if
323	end if
324	end if
325	end if
326	end do
327
328	;****************************************************
329	; start of time step and different types of mistakes that could be done
330	;****************************************************
331
332	if (start_time_step .EQ. -1.d) then
333	start_time_step=t_all(0)/3600
334	else
335	if (start_time_step .GT. t_all(nt-1)/3600)then
336	print(" ")
337	print("'start_time_step' = "+ start_time_step +"h is greater than "+\
338	"last time step = "+ t_all(nt-1)+"s = "+t_all(nt-1)/3600+"h")
339	print(" ")
340	print("Select another 'start_time_step'")
341	print(" ")
342	exit
343	end if
344	if (start_time_step .LT. t_all(0)/3600)then
345	print(" ")
346	print("'start_time_step' = "+ start_time_step +"h is lower than "+\
347	"first time step = "+ t_all(0)+"s = "+t_all(0)/3600+"h")
348	exit
349	end if
350	end if
351
352	do i=0,nt-1
353	if (start_time_step .GE. (t_all(i)-delta_t/2)/3600 .AND. \
354	start_time_step .LT. (t_all(i)+delta_t/2)/3600)then
355	st=i
356	break
357	else
358	st=0
359	end if
360	end do
361
362	;****************************************************
363	; end of time step and different types of mistakes that could be done
364	;****************************************************
365
366	if (end_time_step .EQ. -1.d) then
367	end_time_step = t_all(nt-1)/3600
368	else
369	if (end_time_step .GT. t_all(nt-1)/3600)then
370	print(" ")
371	print("'end_time_step' = "+ end_time_step +"h is greater than "+\
372	"last time step = " + t_all(nt-1)+"s = "+t_all(nt-1)/3600+"h")
373	print(" ")
374	print("Select another 'end_time_step'")
375	print(" ")
376	exit
377	end if
378	if (end_time_step .LT. start_time_step/3600)then
379	print(" ")
380	print("'end_time_step' = "+ end_time_step +"h is lower than "+\
381	"'start_time_step' = "+start_time_step+"h")
382	print(" ")
383	print("Select another 'start_time_step' or 'end_time_step'")
384	print(" ")
385	exit
386	end if
387	end if
388
389	do i=0,nt-1
390	if (end_time_step .GE. (t_all(i)-delta_t/2)/3600 .AND. \
391	end_time_step .LT. (t_all(i)+delta_t/2)/3600)then
392	et=i
393	break
394	else
395	et=0
396	end if
397	end do
398
399	delete(start_time_step)
400	start_time_step=round(st,3)
401	delete(end_time_step)
402	end_time_step=round(et,3)
403
404	print(" ")
405	print("Output of time steps from "+t_all(start_time_step)/3600+" h = "+\
406	t_all(start_time_step)+" s => index = "+start_time_step)
407	print(" till "+t_all(end_time_step)/3600+" h = "+\
408	t_all(end_time_step)+" s => index = "+end_time_step)
409	print(" ")
410
411	dimt = end_time_step-start_time_step+1
412
413	;***************************************************
414	; set up recourses
415	;***************************************************
416
417	res = True
418	res@gsnDraw = False
419	res@gsnFrame = False
420	res@txFont = "helvetica"
421	res@tiMainFont = "helvetica"
422	res@tiXAxisFont = "helvetica"
423	res@tiYAxisFont = "helvetica"
424	res@tmXBLabelFont = "helvetica"
425	res@tmYLLabelFont = "helvetica"
426	res@lgLabelFont = "helvetica"
427	res@tmLabelAutoStride = True
428
429	res@lgLabelFontHeightF = font_size_legend
430	res@lgTitleFontHeightF = font_size
431	res@txFontHeightF = font_size
432	res@tiXAxisFontHeightF = font_size
433	res@tiYAxisFontHeightF = font_size
434	res@tmXBLabelFontHeightF = font_size
435	res@tmYLLabelFontHeightF = font_size
436
437	res@tmXBMinorPerMajor = 4
438	res@tmYLMinorPerMajor = 4
439
440	if (log_x .EQ. 1) then
441	res@trXLog = True
442	else
443	res@trXLog = False
444	end if
445	if (log_y .EQ. 1)then
446	res@trYLog = True
447	else
448	res@trYLog = False
449	end if
450
451	legend_label=new(dimt,string)
452	legend_label_zu=new(dimz,double)
453	legend_label_zw=new(dimz,double)
454	legend_label_z=new(dimz,double)
455	do p=start_time_step,end_time_step
456	legend_label(p-start_time_step)=sprintf("%6.2f", t_all(p)/3600)
457	end do
458	if (sort .EQ. "time")
459	plot = new(dim*dimz,graphic)
460	np=dimt
461	res@lgTitleString = "Time (h)"
462	else
463	plot = new(dim*dimt,graphic)
464	np=dimz
465
466	do p=0,dimz-1
467	if (height_level(0) .EQ. -1)then
468	legend_label_zu(p)=round(zu(p),3)
469	legend_label_zw(p)=round(zw(p),3)
470	else
471	legend_label_zu(p)=round(zuh(p),3)
472	legend_label_zw(p)=round(zwh(p),3)
473	end if
474	end do
475	end if
476
477	if (black .eq. 0 ) then
478	if (np .EQ. 1)then
479	color = 237
480	else
481	step=round(235/(np-1),3)
482	color = ispan(2,237,step)
483	end if
484	else
485	color = 2
486	end if
487	if ( dash .eq. 0 ) then
488	res@xyMonoDashPattern = True
489	end if
490
491	if ( format_out .EQ. "pdf" .OR. format_out .EQ. "ps" ) then
492	format_out@wkPaperSize = "A4"
493	end if
494	if ( format_out .EQ. "png" ) then
495	format_out@wkWidth = 1000
496	format_out@wkHeight = 1000
497	end if
498
499	wks=gsn_open_wks(format_out,file_out)
500	gsn_define_colormap(wks,"rainbow+white")
501
502	n=0
503	do varn =dim-1,0,1
504
505	check = True
506
507	if ( isStrSubset( vNam(varn), "time") .OR. \
508	isStrSubset( vNam(varn), "zu_sp") .OR. \
509	isStrSubset( vNam(varn), "zw_sp") .OR. \
510	isStrSubset( vNam(varn), "k_x") .OR. \
511	isStrSubset( vNam(varn), "k_y")) then
512	check = False
513	end if
514
515	if (var .NE. "all") then
516	check = isStrSubset( var,","+vNam(varn)+"," )
517	end if
518
519	if(check) then
520
521	temp = f[:]->$vNam(varn)$
522	data = temp(start_time_step:end_time_step,0:dimz-1,:)
523
524	temp_att = f_att->$vNam(varn)$
525	a=getvardims(temp_att)
526	b=dimsizes(a)
527	delete(temp_att)
528
529	if (height_level(0) .NE. -1)then
530	do te=0,dimz-1
531	data(:,te,:) = temp(start_time_step:end_time_step,\
532	height_level(te),:)
533	end do
534	end if
535
536	data=data/(norm_y*norm_x)
537
538	do i=0,b-1
539	if (isStrSubset( a(i),"zu_sp" ))then
540	legend_label_z=legend_label_zu
541	if (height_level(0) .NE. -1)then
542	z=zuh
543	else
544	z=zu
545	end if
546	else
547	if (isStrSubset( a(i),"zw_sp" ))then
548	legend_label_z=legend_label_zw
549	if (height_level(0) .NE. -1)then
550	z=zwh
551	else
552	z=zw
553	end if
554	end if
555	end if
556	end do
557
558	if (check_vType) then
559	min_y=new(dimz,double)
560	max_y=new(dimz,double)
561	else
562	min_y=new(dimz,float)
563	max_y=new(dimz,float)
564	end if
565	min_x=new(dimz,double)
566	max_x=new(dimz,double)
567
568	plot_h = new(dimz,graphic)
569
570	if (isStrSubset(vNam(varn),"x"))then
571	x_axis = new((/dimz,dimx/),double)
572	do q=0,dimz-1
573	x_axis(q,:) = f_att->k_x
574	x_axis = x_axis/norm_x
575	end do
576	if (norm_x .NE. 1.)then
577	res@tiXAxisString = "k~B~x~N~ ("+unit_x+")"
578	else
579	if (norm_height .EQ. 1)then
580	res@tiXAxisString = "k~B~x~N~ x z (1)"
581	else
582	res@tiXAxisString = "k~B~x~N~ (1/m)"
583	end if
584	end if
585	dim_r=dimx
586	else
587	x_axis=new((/dimz,dimy/),double)
588	do q=0,dimz-1
589	x_axis(q,:) = f_att->k_y
590	x_axis = x_axis/norm_x
591	end do
592	if (norm_x .NE. 1.)then
593	res@tiXAxisString = "k~B~y~N~ ("+unit_x+")"
594	else
595	if (norm_height .EQ. 1)then
596	res@tiXAxisString = "k~B~y~N~ x z (1)"
597	else
598	res@tiXAxisString = "k~B~y~N~ (1/m)"
599	end if
600	end if
601	dim_r=dimy
602	end if
603
604	if (sort .EQ. "time")
605	res@xyLineColors = color
606	res@pmLegendDisplayMode = "Always"
607	res@pmLegendSide = "Top"
608	res@pmLegendParallelPosF = 1.2
609	res@pmLegendOrthogonalPosF = -1.0
610	res@pmLegendWidthF = 0.12
611	res@pmLegendHeightF = 0.04*\
612	(end_time_step-start_time_step+1)
613	do p=dimz-1,0,1
614	if (log_y .EQ. 1)then
615	do q=0,dimt-1
616	do r=0,dim_r-1
617	if (data(q,p,r) .EQ. 0)then
618	st=p+start_time_step
619	print(" ")
620	print("'"+vNam(varn)+"("+st+","+q+","+r+")' is "+\
621	"equal 0. Logarithmic scale for y-axis "+\
622	"and height "+z(p)+" cannot be used")
623	print(" ")
624	res@trYLog = False
625	end if
626	end do
627	end do
628	end if
629	res@gsnLeftString = vNam(varn)
630	res@gsnRightString = "Height = "+z(p)+"m"
631	res@tiYAxisString = "("+unit_y+")"
632	res@xyExplicitLegendLabels = legend_label
633	if (norm_height .EQ. 1)then
634	data(:,p,:)=data(:,p,:)*doubletofloat(z(p))
635	x_axis(p,:) = x_axis(p,:)*z(p)
636	end if
637	res@trXMinF = min(x_axis(p,:))
638	res@trXMaxF = max(x_axis(p,:))
639	plot(n) = gsn_csm_xy(wks,x_axis(p,:),data(:,p,:),res)
640	n=n+1
641	end do
642	else
643	if (sort .EQ. "height")
644	do p=0,dimt-1
645	do q=0,dimz-1
646	do r=0,dim_r-1
647	if (data(p,q,r) .EQ. 0)then
648	st=p+start_time_step
649	print(" ")
650	print("'"+vNam(varn)+"("+st+","+q+","+r+")' "+\
651	"is equal 0. Logarithmic scale for y-axis "+\
652	"and time "+legend_label(p)+" h cannot be used")
653	print(" ")
654	res@trYLog = False
655	end if
656	end do
657	if (norm_height .EQ. 1 .AND. p .EQ. 0)then
658	data(p,q,:) = data(p,q,:)*\
659	doubletofloat(legend_label_z(q))
660	x_axis(q,:) = x_axis(q,:)*\
661	doubletofloat(legend_label_z(q))
662	end if
663	max_y(q)=max(data(p,q,:))
664	min_y(q)=min(data(p,q,:))
665	min_x(q)=min(x_axis(q,:))
666	max_x(q)=max(x_axis(q,:))
667	end do
668	do q=0,dimz-1
669	res@xyLineColor = color(q)
670	if (dash .EQ. 1)then
671	res@xyDashPattern = q
672	end if
673	if (q .EQ. 0)then
674	res@tiYAxisString = "("+unit_y+")"
675	res@gsnLeftString = vNam(varn)
676	res@gsnRightString = "Time = "+legend_label(p)+"h"
677	res@trXMinF = min(min_x)
678	res@trXMaxF = max(max_x)
679	res@trYMinF = min(min_y)
680	res@trYMaxF = max(max_y*10)
681
682	plot_h(q) = gsn_csm_xy(wks,x_axis(q,:),\
683	data(p,q,:),res)
684
685	lgres = True
686	if (dash .EQ. 0)then
687	lgres@lgMonoDashIndex = True
688	else
689	lgres@lgDashIndexes = ispan(0,dimz-1,1)
690	end if
691	if (black .EQ. 1)then
692	lgres@lgMonoLineColors = True
693	else
694	lgres@lgLineColors = color
695	end if
696	lgres@lgTitleString = "Height (m)"
697	lgres@lgLabelFont = "helvetica"
698	lgres@lgLabelFontHeightF = font_size_legend*6
699	lgres@lgTitleFontHeightF = font_size
700	lgres@vpWidthF = 0.12
701	lgres@vpHeightF = font_size_legend*(dimz+3)
702
703	lbid = gsn_create_legend(wks,dimz,legend_label_z,lgres)
704
705	amres = True
706	amres@amParallelPosF = 0.75
707	amres@amOrthogonalPosF = 0.15
708	annoid1 = gsn_add_annotation(plot_h(q),lbid,amres)
709	else
710	plot_h(q) = gsn_csm_xy(wks,x_axis(q,:),\
711	data(p,q,:),res)
712	overlay(plot_h(0),plot_h(q))
713	end if
714	end do
715	plot(n)=plot_h(0)
716	n=n+1
717	end do
718	end if
719	end if
720	delete(data)
721	delete(temp)
722	delete(x_axis)
723	delete(min_x)
724	delete(max_x)
725	delete(min_y)
726	delete(max_y)
727	delete(plot_h)
728	end if
729	end do
730
731	if (n .EQ. 0) then
732	print(" ")
733	print("The variables 'var="+var+"' do not exist on your input file;")
734	print("be sure to have one comma berfore and after each variable")
735	print(" ")
736	exit
737	end if
738
739	; ***************************************************
740	; merge plots onto one page
741	; ***************************************************
742
743	resP = True
744	resP@gsnMaximize = True
745	resP@gsnPanelXWhiteSpacePercent = 4.0
746	resP@gsnPanelYWhiteSpacePercent = 4.0
747	resP@txFont = "helvetica"
748	resP@txString = f_att@title
749	resP@txFuncCode = "~"
750	resP@txFontHeightF = 0.0105
751
752	no_frames = 0
753
754	if ((format_out .EQ. "eps" .OR. format_out .EQ. "epsi") .AND. \
755	n .gt. no_rows*no_columns) then
756	gsn_panel(wks,plot,(/n,1/),resP)
757	print(" ")
758	print("Outputs to .eps or .epsi have only one frame")
759	print(" ")
760	else
761	do i = 0,n-1, no_rows*no_columns
762	if( (i+no_rows*no_columns) .gt. (n-1)) then
763	gsn_panel(wks,plot(i:n-1),(/no_rows,no_columns/),resP)
764	no_frames = no_frames + 1
765	else
766	gsn_panel(wks,plot(i:i+no_rows*no_columns-1),\
767	(/no_rows,no_columns/),resP)
768	no_frames = no_frames + 1
769	end if
770	end do
771	end if
772
773	if (format_out .EQ. "png" ) then
774	png_output = new((/no_frames/), string)
775	j = 0
776
777	if (no_frames .eq. 1) then
778	if (ncl_version .GE. 6 ) then
779	png_output(0) = file_out+".png"
780	else
781	png_output(0) = file_out+".00000"+1+".png"
782	end if
783	;using imagemagick's convert for reducing the white
784	;space around the plot
785	cmd = "convert -geometry 1000x1000 -density 300 -trim " + \
786	png_output(0) + " " + png_output(0)
787	system(cmd)
788	else
789
790	do i=0, no_frames-1
791	j = i + 1
792	if (j .LE. 9) then
793	png_output(i) = file_out+".00000"+j+".png"
794	end if
795	if (j .GT. 9 .AND. j .LE. 99) then
796	png_output(i) = file_out+".0000"+j+".png"
797	end if
798	if (j .GT. 99 .AND. j .LE. 999) then
799	png_output(i) = file_out+".000"+j+".png"
800	end if
801	if (j .GT. 999) then
802	png_output(i) = file_out+".00"+j+".png"
803	end if
804
805	;using imagemagick's convert for reducing the white
806	;space around the plot
807	cmd = "convert -geometry 1000x1000 -density 300 -trim " + \
808	png_output(i) + " " + png_output(i)
809	system(cmd)
810	end do
811	end if
812
813	print(" ")
814	print("Output to: "+ png_output)
815	print(" ")
816	else
817	print(" ")
818	print("Output to: " + file_out +"."+ format_out)
819	print(" ")
820	end if
821
822	end

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