Expression-class | R Documentation |
This class represents a mathematical expression.
## S4 method for signature 'Expression' value(object) ## S4 method for signature 'Expression' grad(object) ## S4 method for signature 'Expression' domain(object) ## S4 method for signature 'Expression' as.character(x) ## S4 method for signature 'Expression' name(x) ## S4 method for signature 'Expression' expr(object) ## S4 method for signature 'Expression' is_constant(object) ## S4 method for signature 'Expression' is_affine(object) ## S4 method for signature 'Expression' is_convex(object) ## S4 method for signature 'Expression' is_concave(object) ## S4 method for signature 'Expression' is_dcp(object) ## S4 method for signature 'Expression' is_log_log_constant(object) ## S4 method for signature 'Expression' is_log_log_affine(object) ## S4 method for signature 'Expression' is_log_log_convex(object) ## S4 method for signature 'Expression' is_log_log_concave(object) ## S4 method for signature 'Expression' is_dgp(object) ## S4 method for signature 'Expression' is_hermitian(object) ## S4 method for signature 'Expression' is_psd(object) ## S4 method for signature 'Expression' is_nsd(object) ## S4 method for signature 'Expression' is_quadratic(object) ## S4 method for signature 'Expression' is_symmetric(object) ## S4 method for signature 'Expression' is_pwl(object) ## S4 method for signature 'Expression' is_qpwa(object) ## S4 method for signature 'Expression' is_zero(object) ## S4 method for signature 'Expression' is_nonneg(object) ## S4 method for signature 'Expression' is_nonpos(object) ## S4 method for signature 'Expression' dim(x) ## S4 method for signature 'Expression' is_real(object) ## S4 method for signature 'Expression' is_imag(object) ## S4 method for signature 'Expression' is_complex(object) ## S4 method for signature 'Expression' size(object) ## S4 method for signature 'Expression' ndim(object) ## S4 method for signature 'Expression' flatten(object) ## S4 method for signature 'Expression' is_scalar(object) ## S4 method for signature 'Expression' is_vector(object) ## S4 method for signature 'Expression' is_matrix(object) ## S4 method for signature 'Expression' nrow(x) ## S4 method for signature 'Expression' ncol(x)
x, object |
An Expression object. |
value(Expression)
: The value of the expression.
grad(Expression)
: The (sub/super)-gradient of the expression with respect to each variable.
domain(Expression)
: A list of constraints describing the closure of the region where the expression is finite.
as.character(Expression)
: The string representation of the expression.
name(Expression)
: The name of the expression.
expr(Expression)
: The expression itself.
is_constant(Expression)
: The expression is constant if it contains no variables or is identically zero.
is_affine(Expression)
: The expression is affine if it is constant or both convex and concave.
is_convex(Expression)
: A logical value indicating whether the expression is convex.
is_concave(Expression)
: A logical value indicating whether the expression is concave.
is_dcp(Expression)
: The expression is DCP if it is convex or concave.
is_log_log_constant(Expression)
: Is the expression log-log constant, i.e., elementwise positive?
is_log_log_affine(Expression)
: Is the expression log-log affine?
is_log_log_convex(Expression)
: Is the expression log-log convex?
is_log_log_concave(Expression)
: Is the expression log-log concave?
is_dgp(Expression)
: The expression is DGP if it is log-log DCP.
is_hermitian(Expression)
: A logical value indicating whether the expression is a Hermitian matrix.
is_psd(Expression)
: A logical value indicating whether the expression is a positive semidefinite matrix.
is_nsd(Expression)
: A logical value indicating whether the expression is a negative semidefinite matrix.
is_quadratic(Expression)
: A logical value indicating whether the expression is quadratic.
is_symmetric(Expression)
: A logical value indicating whether the expression is symmetric.
is_pwl(Expression)
: A logical value indicating whether the expression is piecewise linear.
is_qpwa(Expression)
: A logical value indicating whether the expression is quadratic of piecewise affine.
is_zero(Expression)
: The expression is zero if it is both nonnegative and nonpositive.
is_nonneg(Expression)
: A logical value indicating whether the expression is nonnegative.
is_nonpos(Expression)
: A logical value indicating whether the expression is nonpositive.
dim(Expression)
: The c(row, col)
dimensions of the expression.
is_real(Expression)
: A logical value indicating whether the expression is real.
is_imag(Expression)
: A logical value indicating whether the expression is imaginary.
is_complex(Expression)
: A logical value indicating whether the expression is complex.
size(Expression)
: The number of entries in the expression.
ndim(Expression)
: The number of dimensions of the expression.
flatten(Expression)
: Vectorizes the expression.
is_scalar(Expression)
: A logical value indicating whether the expression is a scalar.
is_vector(Expression)
: A logical value indicating whether the expression is a row or column vector.
is_matrix(Expression)
: A logical value indicating whether the expression is a matrix.
nrow(Expression)
: Number of rows in the expression.
ncol(Expression)
: Number of columns in the expression.
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