// Vector takes a string and returns a vector if string is
// of vector format, else error.
// Example of matrix format: [1 2 3 2+2i 2 0 3.0 2.3 0+3i] for row vector
// or [1 2 3 2+2i 2 0 3.0 2.3 0+3i]' for the transpose column vector
// or [1 2 3 2+2i 2 0 3.0 2.3 0+3i]* for the conjugate transpose column vector
func Vector(s string) (vector v.Vector, err error) {
if !strings.HasPrefix(s, leftBracket) {
err = errors.New("String is not of type Vector")
return
}
if strings.Count(s, leftBracket) != 1 ||
strings.Count(s, rightBracket) != 1 {
err = errors.New("String is not of type Vector")
return
}
var transposeVector bool
var conjTransposeVector bool
if strings.HasSuffix(s, apostrophe) {
if strings.Index(s, rightBracket) == len(s)-offsetApostrophe {
transposeVector = true
s = strings.TrimRight(s, apostrophe)
} else {
err = errors.New("String is not of type Vector")
return
}
}
if strings.HasSuffix(s, star) {
if strings.Index(s, rightBracket) == len(s)-offsetStar {
conjTransposeVector = true
s = strings.TrimRight(s, star)
} else {
err = errors.New("String is not of type Vector")
return
}
}
s = strings.TrimLeft(s, leftBracket)
s = strings.TrimRight(s, rightBracket)
// vSlice stands for vector string slice
vSlice := strings.Split(s, " ")
var value gcv.Value
vector = v.NewVector(v.RowSpace, len(vSlice))
for index, val := range vSlice {
value, err = Value(val)
if err != nil {
return
}
vector.Set(index, value.Copy())
}
if transposeVector {
vector.Trans()
}
if conjTransposeVector {
vector.ConjTrans()
}
return
}
// Matrix takes a string and returns a matrix if string is
// of matrix format, else error.
// Example of matrix format: [1 2 3: 2+2i 2 0: 3.0 2.3 0+3i]
// [1 2 3: 2+2i 2 0: 3.0 2.3 0+3i]' will return the transpose of the matrix
// [1 2 3: 2+2i 2 0: 3.0 2.3 0+3i]* will return the conjugate transpose of the matrix
func Matrix(s string) (matrix m.Matrix, err error) {
if !strings.HasPrefix(s, leftBracket) {
err = errors.New("String is not of type Matrix")
return
}
if strings.Count(s, leftBracket) != 1 || strings.Count(s, rightBracket) != 1 {
err = errors.New("String is not of type Matrix")
return
}
if strings.Count(s, ":") == 0 {
err = errors.New("String is of type Vector")
return
}
var transposeMatrix bool
var conjTransposeMatrix bool
if strings.HasSuffix(s, apostrophe) {
if strings.Index(s, rightBracket) == len(s)-offsetApostrophe {
transposeMatrix = true
s = strings.TrimRight(s, apostrophe)
} else {
err = errors.New("String is not of type Vector")
return
}
}
if strings.HasSuffix(s, star) {
if strings.Index(s, rightBracket) == len(s)-offsetStar {
conjTransposeMatrix = true
s = strings.TrimRight(s, star)
} else {
err = errors.New("String is not of type Vector")
return
}
}
s = strings.TrimLeft(s, leftBracket)
s = strings.TrimRight(s, rightBracket)
s = strings.Replace(s, ": ", ":", -1)
s = strings.Replace(s, " ", ",", -1)
sSlice := strings.Split(s, ":")
// mSlice stands for matrix string slice
var mSlice [][]string
for _, subSlice := range sSlice {
mSlice = append(mSlice, strings.Split(subSlice, ","))
}
length := len(mSlice[0])
matrix = m.NewMatrix(len(mSlice), length)
var value gcv.Value
// vSlice stands for vector string slice
for indexI, vSlice := range mSlice {
if len(vSlice) != length {
err = errors.New("Inconsistent lengths")
return
}
for indexJ, val := range vSlice {
value, err = Value(val)
if err != nil {
return
}
matrix.Set(indexI, indexJ, value.Copy())
}
}
if transposeMatrix {
matrix.Trans()
}
if conjTransposeMatrix {
matrix.ConjTrans()
}
return
}
