| [2] | 1 | ;------------------------------------------------------------ |
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| 2 | ;------------------------------------------------------------ |
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| 3 | ;------------------------------------------------------------ |
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| 4 | ;+ |
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| 5 | ; |
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| [142] | 6 | ; @file_comments |
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| [163] | 7 | ; Rather comparable to level2depth. It is the invert function of depth2floatlevel |
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| [2] | 8 | ; |
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| [142] | 9 | ; @categories |
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| 10 | ; Without loop |
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| [2] | 11 | ; |
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| [142] | 12 | ; @param TAB |
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| 13 | ; 2d array of sill levels (or a structure respecting litchamp criterions) |
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| [2] | 14 | ; |
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| [142] | 15 | ; @keyword NOMASK |
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| 16 | ; To do not mask land points |
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| [2] | 17 | ; |
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| [142] | 18 | ; @returns |
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| 19 | ; 2d array containing depthes |
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| [2] | 20 | ; |
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| [142] | 21 | ; @uses |
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| 22 | ; common.pro |
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| [2] | 23 | ; |
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| [142] | 24 | ; @examples |
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| [2] | 25 | ; IDL> a=gdept[jpk-1]/(1.*jpi*jpj)*findgen(jpi,jpj) |
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| 26 | ; IDL> plt, 1e6*(a-floatlevel2depth(depth2floatlevel(a))),/nocontour |
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| 27 | ; |
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| [142] | 28 | ; ->null field at 1e-6 pres |
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| [2] | 29 | ; |
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| [142] | 30 | ; @history |
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| [157] | 31 | ; Sebastien Masson (smasson\@lodyc.jussieu.fr) |
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| [2] | 32 | ; 15/6/2000 |
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| [142] | 33 | ; |
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| 34 | ; @version |
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| 35 | ; $Id$ |
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| 36 | ; |
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| [2] | 37 | ;- |
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| 38 | ;------------------------------------------------------------ |
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| 39 | ;------------------------------------------------------------ |
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| 40 | ;------------------------------------------------------------ |
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| 41 | FUNCTION floatlevel2depth, tab, NOMASK = nomask |
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| [114] | 42 | ; |
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| 43 | compile_opt idl2, strictarrsubs |
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| 44 | ; |
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| [142] | 45 | tempsun = systime(1) ; To key_performance |
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| [2] | 46 | @common |
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| 47 | ;------------------------------------------------------------ |
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| 48 | flevelin = litchamp(tab) |
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| [142] | 49 | ; We delete points at !values.f_nan |
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| [2] | 50 | notanumber = where(finite(flevelin, /nan) EQ 1) |
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| 51 | if notanumber[0] NE -1 then flevelin[notanumber] = 0 |
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| [142] | 52 | ; We sill (delete land points at valmask for example) |
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| [2] | 53 | flevelin = 0 > flevelin < (jpk-1) |
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| [142] | 54 | ; We caculate the depth |
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| [2] | 55 | depthup = level2depth(floor(flevelin), /nomask) |
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| 56 | depthlow= level2depth(ceil(flevelin), /nomask) |
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| 57 | weight = flevelin-floor(flevelin) |
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| 58 | res = depthup+weight*(depthlow-depthup) |
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| [142] | 59 | ; We put back points at !values.f_nan |
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| [2] | 60 | if notanumber[0] NE -1 then res[notanumber] = !values.f_nan |
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| [142] | 61 | ; We mask land points at valmask |
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| [2] | 62 | if NOT keyword_set(nomask) then begin |
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| 63 | grille,mask |
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| 64 | if n_elements(valmask) EQ 0 then valmask = 1e20 |
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| 65 | terre = where((temporary(mask))[*, *, 0] EQ 0) |
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| 66 | if terre[0] NE -1 then res[terre] = valmask |
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| 67 | endif |
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| 68 | ;------------------------------------------------------------ |
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| 69 | if keyword_set(key_performance) THEN print, 'temps floatlevel2depth', systime(1)-tempsun |
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| 70 | ; |
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| 71 | return, res |
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| 72 | end |
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