1 | ;+ |
---|
2 | ; |
---|
3 | ; @file_comments |
---|
4 | ; Rather comparable to <pro>level2depth</pro>. |
---|
5 | ; It is the invert function of <pro>depth2floatlevel</pro>. |
---|
6 | ; |
---|
7 | ; @categories |
---|
8 | ; Without loop |
---|
9 | ; |
---|
10 | ; @param TAB |
---|
11 | ; 2d array of sill levels (or a structure respecting litchamp criterions) |
---|
12 | ; |
---|
13 | ; @keyword NOMASK |
---|
14 | ; To do not mask land points |
---|
15 | ; |
---|
16 | ; @returns |
---|
17 | ; 2d array containing depths |
---|
18 | ; |
---|
19 | ; @uses |
---|
20 | ; common.pro |
---|
21 | ; |
---|
22 | ; @examples |
---|
23 | ; IDL> a=gdept[jpk-1]/(1.*jpi*jpj)*findgen(jpi,jpj) |
---|
24 | ; IDL> plt, 1e6*(a-floatlevel2depth(depth2floatlevel(a))),/nocontour |
---|
25 | ; |
---|
26 | ; ->null field at 1e-6 pres |
---|
27 | ; |
---|
28 | ; @history |
---|
29 | ; Sebastien Masson (smasson\@lodyc.jussieu.fr) |
---|
30 | ; 15/6/2000 |
---|
31 | ; |
---|
32 | ; @version |
---|
33 | ; $Id$ |
---|
34 | ; |
---|
35 | ;- |
---|
36 | FUNCTION floatlevel2depth, tab, NOMASK = nomask |
---|
37 | ; |
---|
38 | compile_opt idl2, strictarrsubs |
---|
39 | ; |
---|
40 | tempsun = systime(1) ; To key_performance |
---|
41 | @common |
---|
42 | ;------------------------------------------------------------ |
---|
43 | flevelin = litchamp(tab) |
---|
44 | ; We delete points at !values.f_nan |
---|
45 | notanumber = where(finite(flevelin, /nan) EQ 1) |
---|
46 | if notanumber[0] NE -1 then flevelin[notanumber] = 0 |
---|
47 | ; We sill (delete land points at valmask for example) |
---|
48 | flevelin = 0 > flevelin < (jpk-1) |
---|
49 | ; We calculate the depth |
---|
50 | depthup = level2depth(floor(flevelin), /nomask) |
---|
51 | depthlow= level2depth(ceil(flevelin), /nomask) |
---|
52 | weight = flevelin-floor(flevelin) |
---|
53 | res = depthup+weight*(depthlow-depthup) |
---|
54 | ; We put back points at !values.f_nan |
---|
55 | if notanumber[0] NE -1 then res[notanumber] = !values.f_nan |
---|
56 | ; We mask land points at valmask |
---|
57 | if NOT keyword_set(nomask) then begin |
---|
58 | grille,mask |
---|
59 | if n_elements(valmask) EQ 0 then valmask = 1e20 |
---|
60 | terre = where((temporary(mask))[*, *, 0] EQ 0) |
---|
61 | if terre[0] NE -1 then res[terre] = valmask |
---|
62 | endif |
---|
63 | ;------------------------------------------------------------ |
---|
64 | if keyword_set(key_performance) THEN print, 'temps floatlevel2depth', systime(1)-tempsun |
---|
65 | ; |
---|
66 | return, res |
---|
67 | end |
---|