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// Copyright ©2014 The Gonum Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// This file must be kept in sync with index_bound_checks.go.
// +build !bounds
package mat
// At returns the element at row i, column j.
func (m *Dense) At(i, j int) float64 {
if uint(i) >= uint(m.mat.Rows) {
panic(ErrRowAccess)
}
if uint(j) >= uint(m.mat.Cols) {
panic(ErrColAccess)
}
return m.at(i, j)
}
func (m *Dense) at(i, j int) float64 {
return m.mat.Data[i*m.mat.Stride+j]
}
// Set sets the element at row i, column j to the value v.
func (m *Dense) Set(i, j int, v float64) {
if uint(i) >= uint(m.mat.Rows) {
panic(ErrRowAccess)
}
if uint(j) >= uint(m.mat.Cols) {
panic(ErrColAccess)
}
m.set(i, j, v)
}
func (m *Dense) set(i, j int, v float64) {
m.mat.Data[i*m.mat.Stride+j] = v
}
// At returns the element at row i, column j.
func (m *CDense) At(i, j int) complex128 {
if uint(i) >= uint(m.mat.Rows) {
panic(ErrRowAccess)
}
if uint(j) >= uint(m.mat.Cols) {
panic(ErrColAccess)
}
return m.at(i, j)
}
func (m *CDense) at(i, j int) complex128 {
return m.mat.Data[i*m.mat.Stride+j]
}
// Set sets the element at row i, column j to the value v.
func (m *CDense) Set(i, j int, v complex128) {
if uint(i) >= uint(m.mat.Rows) {
panic(ErrRowAccess)
}
if uint(j) >= uint(m.mat.Cols) {
panic(ErrColAccess)
}
m.set(i, j, v)
}
func (m *CDense) set(i, j int, v complex128) {
m.mat.Data[i*m.mat.Stride+j] = v
}
// At returns the element at row i.
// It panics if i is out of bounds or if j is not zero.
func (v *VecDense) At(i, j int) float64 {
if uint(i) >= uint(v.mat.N) {
panic(ErrRowAccess)
}
if j != 0 {
panic(ErrColAccess)
}
return v.at(i)
}
// AtVec returns the element at row i.
// It panics if i is out of bounds.
func (v *VecDense) AtVec(i int) float64 {
if uint(i) >= uint(v.mat.N) {
panic(ErrRowAccess)
}
return v.at(i)
}
func (v *VecDense) at(i int) float64 {
return v.mat.Data[i*v.mat.Inc]
}
// SetVec sets the element at row i to the value val.
// It panics if i is out of bounds.
func (v *VecDense) SetVec(i int, val float64) {
if uint(i) >= uint(v.mat.N) {
panic(ErrVectorAccess)
}
v.setVec(i, val)
}
func (v *VecDense) setVec(i int, val float64) {
v.mat.Data[i*v.mat.Inc] = val
}
// At returns the element at row i and column j.
func (s *SymDense) At(i, j int) float64 {
if uint(i) >= uint(s.mat.N) {
panic(ErrRowAccess)
}
if uint(j) >= uint(s.mat.N) {
panic(ErrColAccess)
}
return s.at(i, j)
}
func (s *SymDense) at(i, j int) float64 {
if i > j {
i, j = j, i
}
return s.mat.Data[i*s.mat.Stride+j]
}
// SetSym sets the elements at (i,j) and (j,i) to the value v.
func (s *SymDense) SetSym(i, j int, v float64) {
if uint(i) >= uint(s.mat.N) {
panic(ErrRowAccess)
}
if uint(j) >= uint(s.mat.N) {
panic(ErrColAccess)
}
s.set(i, j, v)
}
func (s *SymDense) set(i, j int, v float64) {
if i > j {
i, j = j, i
}
s.mat.Data[i*s.mat.Stride+j] = v
}
// At returns the element at row i, column j.
func (t *TriDense) At(i, j int) float64 {
if uint(i) >= uint(t.mat.N) {
panic(ErrRowAccess)
}
if uint(j) >= uint(t.mat.N) {
panic(ErrColAccess)
}
return t.at(i, j)
}
func (t *TriDense) at(i, j int) float64 {
isUpper := t.triKind()
if (isUpper && i > j) || (!isUpper && i < j) {
return 0
}
return t.mat.Data[i*t.mat.Stride+j]
}
// SetTri sets the element at row i, column j to the value v.
// It panics if the location is outside the appropriate half of the matrix.
func (t *TriDense) SetTri(i, j int, v float64) {
if uint(i) >= uint(t.mat.N) {
panic(ErrRowAccess)
}
if uint(j) >= uint(t.mat.N) {
panic(ErrColAccess)
}
isUpper := t.isUpper()
if (isUpper && i > j) || (!isUpper && i < j) {
panic(ErrTriangleSet)
}
t.set(i, j, v)
}
func (t *TriDense) set(i, j int, v float64) {
t.mat.Data[i*t.mat.Stride+j] = v
}
// At returns the element at row i, column j.
func (b *BandDense) At(i, j int) float64 {
if uint(i) >= uint(b.mat.Rows) {
panic(ErrRowAccess)
}
if uint(j) >= uint(b.mat.Cols) {
panic(ErrColAccess)
}
return b.at(i, j)
}
func (b *BandDense) at(i, j int) float64 {
pj := j + b.mat.KL - i
if pj < 0 || b.mat.KL+b.mat.KU+1 <= pj {
return 0
}
return b.mat.Data[i*b.mat.Stride+pj]
}
// SetBand sets the element at row i, column j to the value v.
// It panics if the location is outside the appropriate region of the matrix.
func (b *BandDense) SetBand(i, j int, v float64) {
if uint(i) >= uint(b.mat.Rows) {
panic(ErrRowAccess)
}
if uint(j) >= uint(b.mat.Cols) {
panic(ErrColAccess)
}
pj := j + b.mat.KL - i
if pj < 0 || b.mat.KL+b.mat.KU+1 <= pj {
panic(ErrBandSet)
}
b.set(i, j, v)
}
func (b *BandDense) set(i, j int, v float64) {
pj := j + b.mat.KL - i
b.mat.Data[i*b.mat.Stride+pj] = v
}
// At returns the element at row i, column j.
func (s *SymBandDense) At(i, j int) float64 {
if uint(i) >= uint(s.mat.N) {
panic(ErrRowAccess)
}
if uint(j) >= uint(s.mat.N) {
panic(ErrColAccess)
}
return s.at(i, j)
}
func (s *SymBandDense) at(i, j int) float64 {
if i > j {
i, j = j, i
}
pj := j - i
if s.mat.K+1 <= pj {
return 0
}
return s.mat.Data[i*s.mat.Stride+pj]
}
// SetSymBand sets the element at row i, column j to the value v.
// It panics if the location is outside the appropriate region of the matrix.
func (s *SymBandDense) SetSymBand(i, j int, v float64) {
if uint(i) >= uint(s.mat.N) {
panic(ErrRowAccess)
}
if uint(j) >= uint(s.mat.N) {
panic(ErrColAccess)
}
s.set(i, j, v)
}
func (s *SymBandDense) set(i, j int, v float64) {
if i > j {
i, j = j, i
}
pj := j - i
if s.mat.K+1 <= pj {
panic(ErrBandSet)
}
s.mat.Data[i*s.mat.Stride+pj] = v
}
func (t *TriBandDense) At(i, j int) float64 {
if uint(i) >= uint(t.mat.N) {
panic(ErrRowAccess)
}
if uint(j) >= uint(t.mat.N) {
panic(ErrColAccess)
}
return t.at(i, j)
}
func (t *TriBandDense) at(i, j int) float64 {
// TODO(btracey): Support Diag field, see #692.
isUpper := t.isUpper()
if (isUpper && i > j) || (!isUpper && i < j) {
return 0
}
kl := t.mat.K
ku := 0
if isUpper {
ku = t.mat.K
kl = 0
}
pj := j + kl - i
if pj < 0 || kl+ku+1 <= pj {
return 0
}
return t.mat.Data[i*t.mat.Stride+pj]
}
func (t *TriBandDense) SetTriBand(i, j int, v float64) {
if uint(i) >= uint(t.mat.N) {
panic(ErrRowAccess)
}
if uint(j) >= uint(t.mat.N) {
panic(ErrColAccess)
}
isUpper := t.isUpper()
if (isUpper && i > j) || (!isUpper && i < j) {
panic(ErrTriangleSet)
}
kl, ku := t.mat.K, 0
if isUpper {
kl, ku = 0, t.mat.K
}
pj := j + kl - i
if pj < 0 || kl+ku+1 <= pj {
panic(ErrBandSet)
}
// TODO(btracey): Support Diag field, see #692.
t.mat.Data[i*t.mat.Stride+pj] = v
}
func (t *TriBandDense) setTriBand(i, j int, v float64) {
var kl int
if !t.isUpper() {
kl = t.mat.K
}
pj := j + kl - i
t.mat.Data[i*t.mat.Stride+pj] = v
}
// At returns the element at row i, column j.
func (d *DiagDense) At(i, j int) float64 {
if uint(i) >= uint(d.mat.N) {
panic(ErrRowAccess)
}
if uint(j) >= uint(d.mat.N) {
panic(ErrColAccess)
}
return d.at(i, j)
}
func (d *DiagDense) at(i, j int) float64 {
if i != j {
return 0
}
return d.mat.Data[i*d.mat.Inc]
}
// SetDiag sets the element at row i, column i to the value v.
// It panics if the location is outside the appropriate region of the matrix.
func (d *DiagDense) SetDiag(i int, v float64) {
if uint(i) >= uint(d.mat.N) {
panic(ErrRowAccess)
}
d.setDiag(i, v)
}
func (d *DiagDense) setDiag(i int, v float64) {
d.mat.Data[i*d.mat.Inc] = v
}
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