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Ajuda do Scilab >> Funções Elementares > Trigonometria > coth

coth

cotangente hiperbólica

Seqüência de Chamamento

t = coth(x)

Parâmetros

x

vector or matrix of real or complex numbers (full or sparse-encoded).

t

a full-encoded vector or matrix of real or complex numbers.

Descrição

Os elementos do vetor t são as cotangentes hiperbólicas dos elementos do vetor x.

coth(0) not being 0, the result for any input sparse-encoded matrix is always full-encoded (as for cos()).

Exemplos

x = [1, 2*%i]
t = exp(x);
(t-ones(x)./t).\(t+ones(x)./t)
coth(x)
coth([-0 0])

// With sparses:
s = sparse([1 1; 3 1; 2 2; 2 3; 1 3],[0.02 0.7 0.15 0.4 3],[3 3])
coth(s)   // no longer sparse
--> (t-ones(x)./t).\(t+ones(x)./t)
 ans  =
   1.3130353   0.4576576i

--> coth(x)
 ans  =
   1.3130353   0.4576576i

--> coth([-0 0])
 ans  =
  -Inf   Inf

--> // With sparses:
--> s = sparse([1 1; 3 1; 2 2; 2 3; 1 3],[0.02 0.7 0.15 0.4 3],[3 3])
 s  =
(  3,  3) sparse matrix
(  1,  1)      0.02
(  1,  3)      3.
(  2,  2)      0.15
(  2,  3)      0.4
(  3,  1)      0.7

--> coth(s)   // no longer sparse
 ans  =
   50.006666   Inf         1.0049698
   Inf         6.7165918   2.6319324
   1.6546216   Inf         Inf

Ver Também

Histórico

VersionDescription
6.1.0 Extension to sparse matrices.
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Last updated:
Tue Feb 25 08:52:28 CET 2020