From 9d856e6f9f065b1dacb6ae8ce8039118b168321f Mon Sep 17 00:00:00 2001
From: wangfeng <wangfengxy@sina.cn>
Date: Fri, 3 Feb 2023 11:53:31 +0800
Subject: [PATCH 1/2] =?UTF-8?q?=E5=88=A0=E9=99=A4=E5=BA=9F=E5=BC=83?=
 =?UTF-8?q?=E7=9A=84=E5=87=BD=E6=95=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 stat/where.go | 34 ----------------------------------
 1 file changed, 34 deletions(-)

diff --git a/stat/where.go b/stat/where.go
index 929cd3e..a7d5253 100644
--- a/stat/where.go
+++ b/stat/where.go
@@ -2,7 +2,6 @@ package stat
 
 import (
 	"gitee.com/quant1x/pandas/algorithms/avx2"
-	"math"
 )
 
 //func Where[T int64 | float64](condition any, params ...any) []T {
@@ -18,39 +17,6 @@ import (
 // params只支持两个默认值x和y, 如果condition为true返回x, 否则返回y
 // condition和param都可能是基础数据类型,也可能是一个slice, 并且长度可能不一致
 // 直接写成序列版本, 可能更简单
-// func Where[T int64 | float64](condition []T, x, y []T) []T {
-func Where1(condition []float64, x, y []float64) []float64 {
-	// 第一步, 找出最长的
-	clen := len(condition)
-	xlen := len(x)
-	ylen := len(y)
-	// 第二步, 找出最大长度
-	c := []float64{float64(clen), float64(xlen), float64(ylen)}
-	maxLength := int(avx2.Max(c))
-
-	// 对齐所有长度
-	if clen < maxLength {
-		condition = align(condition, math.NaN(), maxLength)
-	}
-	if xlen < maxLength {
-		x = align(x, math.NaN(), maxLength)
-	}
-	if ylen < maxLength {
-		y = align(y, math.NaN(), maxLength)
-	}
-	// 初始化返回值
-	d := make([]float64, maxLength)
-	for i := 0; i < maxLength; i++ {
-		// NaN也被认为是真
-		if condition[i] != 0 {
-			d[i] = x[i]
-		} else {
-			d[i] = y[i]
-		}
-	}
-	return d
-}
-
 func Where[T StatType](condition []T, x, y []T) []T {
 	// 第一步, 找出最长的
 	clen := len(condition)
-- 
Gitee


From 40e84be7098d3d20d9cfd86c46843d5833ff8579 Mon Sep 17 00:00:00 2001
From: wangfeng <wangfengxy@sina.cn>
Date: Fri, 3 Feb 2023 13:19:11 +0800
Subject: [PATCH 2/2] =?UTF-8?q?#I6CC1H=20=E5=AE=9E=E7=8E=B0abs=E7=BB=9D?=
 =?UTF-8?q?=E5=AF=B9=E5=80=BC=E7=9A=84=E5=BA=8F=E5=88=97=E5=8C=96=E7=89=88?=
 =?UTF-8?q?=E6=9C=AC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 stat/abs.go         | 14 ++++++++++++++
 stat/abs_test.go    | 19 +++++++++++++++++++
 stat/unsafe.go      |  8 ++++++++
 stat/unsafe_test.go | 12 ++++++++++++
 4 files changed, 53 insertions(+)
 create mode 100644 stat/abs.go
 create mode 100644 stat/abs_test.go
 create mode 100644 stat/unsafe.go
 create mode 100644 stat/unsafe_test.go

diff --git a/stat/abs.go b/stat/abs.go
new file mode 100644
index 0000000..c3af367
--- /dev/null
+++ b/stat/abs.go
@@ -0,0 +1,14 @@
+package stat
+
+func Abs[T StatType](x []T) []T {
+	xlen := len(x)
+	d := make([]T, xlen)
+	for i := 0; i < xlen; i++ {
+		if x[i] < 0 {
+			d[i] = -1 * (x[i])
+		} else {
+			d[i] = x[i]
+		}
+	}
+	return d
+}
diff --git a/stat/abs_test.go b/stat/abs_test.go
new file mode 100644
index 0000000..45f76f9
--- /dev/null
+++ b/stat/abs_test.go
@@ -0,0 +1,19 @@
+package stat
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestAbs(t *testing.T) {
+
+	v1 := []int32{1, -1, 2, -2}
+	fmt.Println(Abs(v1))
+	v2 := []int64{1, -1, 2, -2}
+	fmt.Println(Abs(v2))
+	v3 := []float32{1.1, -1.1, 2.2, -2.2}
+	fmt.Println(Abs(v3))
+	v4 := []float64{1.1, -1.1, 2.2, -2.2}
+	fmt.Println(Abs(v4))
+
+}
diff --git a/stat/unsafe.go b/stat/unsafe.go
new file mode 100644
index 0000000..45766af
--- /dev/null
+++ b/stat/unsafe.go
@@ -0,0 +1,8 @@
+package stat
+
+func math_abs[T StatType](v T) T {
+	if v < 0 {
+		return v * -1
+	}
+	return v
+}
diff --git a/stat/unsafe_test.go b/stat/unsafe_test.go
new file mode 100644
index 0000000..e53ad50
--- /dev/null
+++ b/stat/unsafe_test.go
@@ -0,0 +1,12 @@
+package stat
+
+import (
+	"fmt"
+	"testing"
+)
+
+func Test_frombits(t *testing.T) {
+	i32_1 := float64(-1)
+	//fmt.Println(math.Abs(i32_1))
+	fmt.Println(math_abs(i32_1))
+}
-- 
Gitee