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fieldnames

Noms des champs d’une structure, ou champs publics d’un objet Microsoft COM ou Java

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Syntaxe

fields = fieldnames(S)
fields = fieldnames(obj,'-full')

Description

exemple

fields = fieldnames(S) renvoie les noms de champs d'un tableau de structure S dans un cell array.

fields = fieldnames(obj,'-full') renvoie un cell array de vecteurs de caractères contenant le nom, le type, les attributs et l’héritage des propriétés de obj. L’argument obj en entrée est un objet Microsoft® COM ou Java®.

Exemples

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Créez un tableau de structure.

S(1,1).x = linspace(0,2*pi);
S(1,1).y = sin(S(1,1).x);
S(1,1).title = 'y = sin(x)';
S(2,1).x = linspace(0,2*pi);
S(2,1).y = cos(S(2,1).x);
S(2,1).title = 'y = cos(x)'
S=2×1 struct array with fields:
    x
    y
    title

Renvoyez les noms des champs du cell array à l’aide de la fonction fieldnames.

fields = fieldnames(S)
fields = 3x1 cell
    {'x'    }
    {'y'    }
    {'title'}

Pour renvoyer les valeurs des champs, utilisez la fonction struct2cell. struct2cell et fieldnames renvoient les valeurs et les noms des champs dans le même ordre.

values = struct2cell(S)
values=3×2 cell array
    {[                                                      0 0.0635 0.1269 0.1904 0.2539 0.3173 0.3808 0.4443 0.5077 0.5712 0.6347 0.6981 0.7616 0.8251 0.8885 0.9520 1.0155 1.0789 1.1424 1.2059 1.2693 1.3328 1.3963 1.4597 1.5232 1.5867 1.6501 1.7136 1.7771 1.8405 1.9040 1.9675 2.0309 2.0944 2.1579 2.2213 2.2848 2.3483 2.4117 2.4752 2.5387 2.6021 2.6656 2.7291 2.7925 2.8560 2.9195 2.9829 3.0464 3.1099 3.1733 3.2368 3.3003 3.3637 3.4272 3.4907 3.5541 3.6176 3.6811 3.7445 3.8080 3.8715 3.9349 3.9984 4.0619 4.1253 4.1888 4.2523 4.3157 4.3792 4.4427 4.5061 4.5696 4.6331 4.6965 4.7600 4.8235 4.8869 4.9504 5.0139 5.0773 5.1408 5.2043 5.2677 5.3312 5.3947 5.4581 5.5216 5.5851 5.6485 5.7120 5.7755 5.8389 5.9024 5.9659 6.0293 6.0928 6.1563 6.2197 6.2832]}    {[                                             0 0.0635 0.1269 0.1904 0.2539 0.3173 0.3808 0.4443 0.5077 0.5712 0.6347 0.6981 0.7616 0.8251 0.8885 0.9520 1.0155 1.0789 1.1424 1.2059 1.2693 1.3328 1.3963 1.4597 1.5232 1.5867 1.6501 1.7136 1.7771 1.8405 1.9040 1.9675 2.0309 2.0944 2.1579 2.2213 2.2848 2.3483 2.4117 2.4752 2.5387 2.6021 2.6656 2.7291 2.7925 2.8560 2.9195 2.9829 3.0464 3.1099 3.1733 3.2368 3.3003 3.3637 3.4272 3.4907 3.5541 3.6176 3.6811 3.7445 3.8080 3.8715 3.9349 3.9984 4.0619 4.1253 4.1888 4.2523 4.3157 4.3792 4.4427 4.5061 4.5696 4.6331 4.6965 4.7600 4.8235 4.8869 4.9504 5.0139 5.0773 5.1408 5.2043 5.2677 5.3312 5.3947 5.4581 5.5216 5.5851 5.6485 5.7120 5.7755 5.8389 5.9024 5.9659 6.0293 6.0928 6.1563 6.2197 6.2832]}
    {[0 0.0634 0.1266 0.1893 0.2511 0.3120 0.3717 0.4298 0.4862 0.5406 0.5929 0.6428 0.6901 0.7346 0.7761 0.8146 0.8497 0.8815 0.9096 0.9341 0.9549 0.9718 0.9848 0.9938 0.9989 0.9999 0.9969 0.9898 0.9788 0.9638 0.9450 0.9224 0.8960 0.8660 0.8326 0.7958 0.7557 0.7127 0.6668 0.6182 0.5671 0.5137 0.4582 0.4009 0.3420 0.2817 0.2203 0.1580 0.0951 0.0317 -0.0317 -0.0951 -0.1580 -0.2203 -0.2817 -0.3420 -0.4009 -0.4582 -0.5137 -0.5671 -0.6182 -0.6668 -0.7127 -0.7557 -0.7958 -0.8326 -0.8660 -0.8960 -0.9224 -0.9450 -0.9638 -0.9788 -0.9898 -0.9969 -0.9999 -0.9989 -0.9938 -0.9848 -0.9718 -0.9549 -0.9341 -0.9096 -0.8815 -0.8497 -0.8146 -0.7761 -0.7346 -0.6901 -0.6428 -0.5929 -0.5406 -0.4862 -0.4298 -0.3717 -0.3120 -0.2511 -0.1893 -0.1266 -0.0634 -2.4493e-16]}    {[1 0.9980 0.9920 0.9819 0.9679 0.9501 0.9284 0.9029 0.8738 0.8413 0.8053 0.7660 0.7237 0.6785 0.6306 0.5801 0.5272 0.4723 0.4154 0.3569 0.2969 0.2358 0.1736 0.1108 0.0476 -0.0159 -0.0792 -0.1423 -0.2048 -0.2665 -0.3271 -0.3863 -0.4441 -0.5000 -0.5539 -0.6056 -0.6549 -0.7015 -0.7453 -0.7861 -0.8237 -0.8580 -0.8888 -0.9161 -0.9397 -0.9595 -0.9754 -0.9874 -0.9955 -0.9995 -0.9995 -0.9955 -0.9874 -0.9754 -0.9595 -0.9397 -0.9161 -0.8888 -0.8580 -0.8237 -0.7861 -0.7453 -0.7015 -0.6549 -0.6056 -0.5539 -0.5000 -0.4441 -0.3863 -0.3271 -0.2665 -0.2048 -0.1423 -0.0792 -0.0159 0.0476 0.1108 0.1736 0.2358 0.2969 0.3569 0.4154 0.4723 0.5272 0.5801 0.6306 0.6785 0.7237 0.7660 0.8053 0.8413 0.8738 0.9029 0.9284 0.9501 0.9679 0.9819 0.9920 0.9980 1]}
    {'y = sin(x)'                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  }    {'y = cos(x)'                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         }

Arguments d'entrée

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Tableau de structure en entrée.

Objet en entrée, spécifié en tant qu’objet Java ou objet Microsoft COM.

Capacités étendues

Historique des versions

Introduit avant R2006a

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