fixed dependencies
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56
vendor/github.com/nuknal/goNum/NormInf.go
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56
vendor/github.com/nuknal/goNum/NormInf.go
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// NormInf
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/*
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------------------------------------------------------
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作者 : Black Ghost
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日期 : 2018-11-21
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版本 : 0.0.0
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------------------------------------------------------
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求矩阵无穷范数
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理论:
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参考 李信真, 车刚明, 欧阳洁, 等. 计算方法. 西北工业大学
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出版社, 2000, pp 65.
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||A||Inf = Maxi(Sumj(|aij|))
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------------------------------------------------------
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输入 :
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A 矩阵
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输出 :
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sol 范数值
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err 解出标志:false-未解出或达到步数上限;
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true-全部解出
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------------------------------------------------------
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*/
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package goNum
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import "math"
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// NormInf 求矩阵无穷范数
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func NormInf(A Matrix) (float64, bool) {
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/*
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求矩阵无穷范数
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输入 :
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A 矩阵
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输出 :
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sol 范数值
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err 解出标志:false-未解出或达到步数上限;
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true-全部解出
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*/
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var sol float64
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var err bool = false
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//求取行绝对值的和
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row := make([]float64, A.Rows)
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for i := 0; i < A.Rows; i++ {
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thisRow := A.RowOfMatrix(i)
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for j := 0; j < len(thisRow); j++ {
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row[i] += math.Abs(thisRow[j])
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}
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}
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//求取最大值
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sol, _, _ = Max(row)
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err = true
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return sol, err
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}
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