在Breeze中逐行轉換矩陣到陣列

Question

嘗試逐行將DenseMatrix轉換爲數組。方法.toArray逐列執行。

-0.04202212765812874 0.001493146410211921 0.06454376876354218 
-0.0281160194426775 -0.003562772646546364 0.03207217156887054 
-0.02658860757946968 -0.005901590455323458 -0.02247502095997334 
-0.04329672083258629 3.376986423972994E-4 -0.07749124616384506 
-0.05902788043022156 -6.114873685874045E-4 -0.0953570306301117 
-0.07074625790119171 -0.007206509355455637 -0.0750989243388176 
-0.07417105883359909 -0.004011879675090313 -0.03285343572497368 
-0.06564008444547653 -0.007175311911851168 0.007573474664241076 
-0.05417965352535248 -0.007217721547931433 0.02540822699666023 
-0.05201821774244308 -0.005401707720011473 0.04020853340625763 
-0.03879288583993912 -0.01046885177493095 0.04271911829710007 

應該是[-0.04202212765812874, 0.001493146410211921, 0.06454376876354218, -0.0281160194426775, -0.003562772646546364, ....]

Answer 1

可以移調矩陣，然後調用toArray方法：

import breeze.linalg._ 
val mat = new DenseMatrix[Double](2, 2, Array(1.1, 1.2, 1.3, 1.4)) 
//1.1 1.3 
//1.2 1.4 

mat.t.toArray 
// res0: Array[Double] = Array(1.1, 1.3, 1.2, 1.4)