Examples
isreal([1 2]) isreal(1+0*%i) isreal(1+0*%i,0) isreal(1+%s) isreal(sprand(3,3,0.1)) |  |  |
check if a variable has real or complex entries
t=isreal(x) t=isreal(x,eps)
vector or matrix with floating point entries or coefficients
a boolean
isreal(x) returns true if x is
stored as a real variable and false if x is stored with
an (eventually zero) imaginary part.
isreal(x,eps) returns true if
x is stored as a real variable or if maximum absolute
value of imaginary floating points is less or equal than
eps.
isreal([1 2]) isreal(1+0*%i) isreal(1+0*%i,0) isreal(1+%s) isreal(sprand(3,3,0.1)) | | |