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Annexe A : Instructions et fonctions 949
randMat() Menu MATH/Probability matAléat()
randMat(
nbLignes
,
nbColonnes
)
matrice
Retourne une matrice aléatoire de la dimension
indiquée, à coefficients entiers compris entre -9 et
9.
RandSeed 1147 ¸ Done
randMat(3,3) ¸
8 ë 3 6
ë 2 3 ë 6
0 4 ë 6
Note. la valeur de cette matrice change chaque
fois que l'on appuie sur ¸.
randNorm() Menu MATH/Probability normAléa()
randNorm(
moyenne
,
écartType
)
expression
Retourne des nombres aléatoires répartis suivant
une loi normale de paramètres
moyenne
et
écartType
.
On peut obtenir un nombre réel quelconque, mais
les résultats obtenus seront essentiellement
compris entre
moyenne
2
écartType
et
moyenne
+
2
écartType
.
RandSeed 1147 ¸ Done
randNorm(0,1) ¸ 0.492...
randNorm(3,4.5) ¸ -3.543
...
randPoly() Menu MATH/Probability polyAléa()
randPoly(
var
,
degré
)
expression
Retourne un polynôme en
var
du degré indiqué, à
coefficients entiers compris entre
9 et 9.
Le premier coefficient sera non nul.
Ordre
doit être un entier supérieur à zéro.
RandSeed 1147 ¸ Done
randPoly(x,5) ¸
ë 2ø x
5
+3ø x
4
ì 6ø x
3
+4ø xì 6
RandSeed Menu MATH/Probability IniNbrAl
RandSeed
nombre
Initialisation d'une nouvelle série de nombres
aléatoires. Cette instruction place deux nombres
dans les variables systèmes
seed1 et seed2. Ces
deux nombres sont ensuite utilisés pour
engendrer le prochain nombre aléatoire.
En utilisant la valeur 0, on revient aux valeurs par
défaut.
RandSeed 1147 ¸ Done
rand()¸ 0.158
...
RclGDB CATALOG RplBDG
RclGDB
GDBvar
Rétablit tous les réglages mémorisés dans la
variable
GDBvar
.
Pour la liste des réglages disponibles, voir
StoGDB.
RclGDB GDBvar ¸ Done
RclPic CATALOG PlaceImg
RclPic
picVar
[,
ligne
,
col
]
Affiche l'écran graphique et superpose l'image
mémorisée dans
picVar
à partir du pixel de
coordonnées (
ligne
,
col
).
La variable
picVar
doit être de type Picture.
Les coordonnées par défaut sont (0, 0).
948


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