| [2] | 1 | ;+ |
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| 2 | ; |
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| [226] | 3 | ; @file_comments |
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| [232] | 4 | ; Rather comparable to <pro>level2depth</pro>. |
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| [231] | 5 | ; It is the invert function of <pro>depth2floatlevel</pro>. |
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| [2] | 6 | ; |
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| [142] | 7 | ; @categories |
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| 8 | ; Without loop |
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| [2] | 9 | ; |
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| [142] | 10 | ; @param TAB |
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| 11 | ; 2d array of sill levels (or a structure respecting litchamp criterions) |
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| [2] | 12 | ; |
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| [142] | 13 | ; @keyword NOMASK |
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| 14 | ; To do not mask land points |
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| [2] | 15 | ; |
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| [142] | 16 | ; @returns |
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| [226] | 17 | ; 2d array containing depths |
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| [2] | 18 | ; |
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| [142] | 19 | ; @uses |
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| 20 | ; common.pro |
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| [2] | 21 | ; |
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| [142] | 22 | ; @examples |
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| [2] | 23 | ; IDL> a=gdept[jpk-1]/(1.*jpi*jpj)*findgen(jpi,jpj) |
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| 24 | ; IDL> plt, 1e6*(a-floatlevel2depth(depth2floatlevel(a))),/nocontour |
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| 25 | ; |
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| [142] | 26 | ; ->null field at 1e-6 pres |
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| [2] | 27 | ; |
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| [142] | 28 | ; @history |
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| [157] | 29 | ; Sebastien Masson (smasson\@lodyc.jussieu.fr) |
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| [2] | 30 | ; 15/6/2000 |
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| [142] | 31 | ; |
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| 32 | ; @version |
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| 33 | ; $Id$ |
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| 34 | ; |
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| [2] | 35 | ;- |
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| 36 | FUNCTION floatlevel2depth, tab, NOMASK = nomask |
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| [114] | 37 | ; |
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| 38 | compile_opt idl2, strictarrsubs |
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| 39 | ; |
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| [142] | 40 | tempsun = systime(1) ; To key_performance |
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| [2] | 41 | @common |
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| 42 | ;------------------------------------------------------------ |
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| 43 | flevelin = litchamp(tab) |
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| [142] | 44 | ; We delete points at !values.f_nan |
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| [2] | 45 | notanumber = where(finite(flevelin, /nan) EQ 1) |
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| 46 | if notanumber[0] NE -1 then flevelin[notanumber] = 0 |
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| [142] | 47 | ; We sill (delete land points at valmask for example) |
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| [2] | 48 | flevelin = 0 > flevelin < (jpk-1) |
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| [226] | 49 | ; We calculate the depth |
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| [2] | 50 | depthup = level2depth(floor(flevelin), /nomask) |
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| 51 | depthlow= level2depth(ceil(flevelin), /nomask) |
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| 52 | weight = flevelin-floor(flevelin) |
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| 53 | res = depthup+weight*(depthlow-depthup) |
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| [142] | 54 | ; We put back points at !values.f_nan |
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| [2] | 55 | if notanumber[0] NE -1 then res[notanumber] = !values.f_nan |
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| [142] | 56 | ; We mask land points at valmask |
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| [2] | 57 | if NOT keyword_set(nomask) then begin |
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| 58 | grille,mask |
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| 59 | if n_elements(valmask) EQ 0 then valmask = 1e20 |
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| 60 | terre = where((temporary(mask))[*, *, 0] EQ 0) |
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| 61 | if terre[0] NE -1 then res[terre] = valmask |
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| 62 | endif |
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| 63 | ;------------------------------------------------------------ |
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| [226] | 64 | if keyword_set(key_performance) THEN print, 'temps floatlevel2depth', systime(1)-tempsun |
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| [2] | 65 | ; |
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| 66 | return, res |
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| 67 | end |
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