Download → Introduction to AI Technologies-1st(handout)_Mar_3_Ebata
エクセルの計算覚え書き Keywords: COUNTIF, COUNTIFS, AVERAGEIFS
使う度に調べるので、メモしておきます。
1. 40歳から44歳の人の人数を数えろ
=COUNTIFS($B$1:$B$498, ">=45",$B$1:$B$498, "<50" )
2.55歳から59歳の人の不満値の平均値を求めよ
=AVERAGEIFS($J$1:$J$498, $B$1:$B$498, ">=55",$B$1:$B$498, "<60" )
Keywords: COUNTIF, COUNTIFS, AVERAGEIFS
How to make a Neural Network to solve XOR problem
This program is based on the following page
https://qiita.com/ufoo68/items/9e4ca04578ba0f5fa5ff
This program solves the XOR problem using MLP with one hidden layer.
#include <stdio.h>
#include <math.h>
#include <time.h>
#include <stdlib.h>
//num of units
#define NUM_INPUT 2
//#define NUM_HIDDEN 20
#define NUM_HIDDEN 2
double sigmoid(double x) {
return 1/(1+exp(-x));
}
//derivative of sigmoid function
double d_sigmoid(double x) {
double a = 0.1;
return a*x*(1-x);
}
int main(void) {
srand((unsigned)time(NULL));
//train data
double train_x[4][NUM_INPUT+1] = {{0, 0, -1},{0, 1, -1},{1, 0, -1},{1, 1, -1}};
double d[4] = {0, 1, 1, 0};
//net
double w[NUM_HIDDEN+1][NUM_INPUT+1];
double v[NUM_HIDDEN+1];
double y[4][NUM_HIDDEN+1];
double z[4];
double eta = 0.1;
int epoch = 1000000;
//other
int i, j, k, l;
double tmp = 0;
//update weights using rand()
for(l=0; l<NUM_HIDDEN+1; l++) {
for(i=0; i<NUM_INPUT+1; i++) {
w[l][i] = ((double)rand() / ((double)RAND_MAX + 1));
}
}
for(i=0; i<NUM_HIDDEN+1; i++) {
v[i] = ((double)rand() / ((double)RAND_MAX + 1));
}
//tain
for(k=0; k<epoch; k++) {
//feedforward
for(j=0; j<4; j++) {
//hidden
for(l=0; l<NUM_HIDDEN; l++) {
for(i=0; i<NUM_INPUT+1; i++) {
tmp += train_x[j][i] * w[l][i];
}
y[j][l] = sigmoid(tmp);
tmp = 0;
}
y[j][NUM_HIDDEN] = -1;
//output
for(i=0; i<NUM_HIDDEN+1; i++) {
tmp += y[j][i] * v[i];
}
z[j] = sigmoid(tmp);
tmp = 0;
//backward
//output
for(i=0; i<NUM_HIDDEN+1; i++) {
v[i] = v[i] - eta * y[j][i] * d_sigmoid(z[j]) * (z[j] - d[j]);
}
//hidden
for(l=0; l<NUM_INPUT+1; l++) {
for(i=0; i<NUM_HIDDEN+1; i++) {
w[i][l] = w[i][l] - eta * train_x[j][l] * d_sigmoid(y[j][i]) * d_sigmoid(z[j]) * (z[j] - d[j]) * v[i];
}
}
}
/*
//print detail
printf("z=");
for(i=0; i<4; i++) {
printf("%f ", z[i]);
}
printf("epoch:%d\n",k);
*/
}
//predict
for(j=0; j<4; j++) {
//hidden
for(l=0; l<NUM_HIDDEN; l++) {
for(i=0; i<NUM_INPUT+1; i++) {
tmp += train_x[j][i] * w[l][i];
}
y[j][l] = sigmoid(tmp);
tmp = 0;
}
y[j][NUM_HIDDEN] = -1;
//output
for(i=0; i<NUM_HIDDEN+1; i++) {
tmp += y[j][i] * v[i];
}
z[j] = sigmoid(tmp);
tmp = 0;
}
//print result
printf("z=");
for(i=0; i<4; i++) {
printf("%f ", z[i]);
}
printf("epoch:%d\n",k);
for(i=0; i<NUM_INPUT+1; i++) {
for(l=0; l<NUM_HIDDEN+1; l++) {
printf("w[%d][%d]:%f\n", i, l, w[i][l]);
}
}
for(i=0; i<NUM_HIDDEN+1; i++) {
printf("v[%d]:%f\n",i, v[i]);
}
return 0;
}
Save this program as a name "mlp.c", compile ">gcc mlp.c" and execute ">./a.exe"
Golang 文字列を数値に変換する方法
Golang 文字列を数値に変換する方法で、文字列→実数なら、これが一番てっとり早そう
dest_lat, err := strconv.ParseFloat(row[2], 64)
strconv.ParseIntとstrconv.ParseUnitは、文字列を解析して整数型を返す関数
それぞれ符号付き整数型と符号なし整数型に対応している。
Exercise (Fuzzy Reasoning)
I hope you could understand the min-max method of Fuzzy reasoning, using the following Go programming list.
package main
import (
"fmt"
"os"
)
func max_2(a, b float64) float64 {
if a > b {
return a
} else {
return b
}
}
func min_2(a, b float64) float64 {
if a > b {
return b
} else {
return a
}
}
type condition_MF3 struct { // Base class for condition_MF3
center float64
width float64
express string
}
func new_condition_MF3(_center, _width float64, _express string) *condition_MF3 {
c3 := new(condition_MF3)
c3.center = _center
c3.width = _width
c3.express = _express
return c3
}
// Class for the membership function (3 mountains) of the former case
func (c3 *condition_MF3) func_X(_x float64) float64 {
// x,y denote coordinates on the membership function
x := _x
y := 0.0 // The value of y is always greater than or equal to 0 and less than or equal to 1
if c3.express == "LESS" {
if x <= c3.center-c3.width {
y = 1.0
} else if x <= c3.center {
y = -1.0 / c3.width * (x - c3.center)
} else {
y = 0.0
}
} else if c3.express == "COMMON" {
if x <= c3.center-c3.width {
y = 0.0
} else if x <= c3.center {
y = 1.0/c3.width*(x-c3.center) + 1.0
} else if x <= c3.center+c3.width {
y = -1.0/c3.width*(x-c3.center) + 1.0
} else {
y = 0.0
}
} else if c3.express == "MORE" {
if x <= c3.center {
y = 0.0
} else if x <= c3.center+c3.width {
y = 1.0 / c3.width * (x - c3.center)
} else {
y = 1.0
}
} else {
fmt.Println("MF3: wrong expression")
os.Exit(1)
}
return y
}
type condition_MF5 struct { // Base class for condition_MF5
center float64
width float64
express string
}
func new_condition_MF5(_center, _width float64, _express string) *condition_MF5 {
c5 := new(condition_MF5)
c5.center = _center
c5.width = _width
c5.express = _express
return c5
}
func (c5 *condition_MF5) func_X(_x float64) float64 {
// Class for the former membership function (5 mountains)
// x,y are the coordinates on the membership function
x := _x
y := 0.0 // The value of y is always greater than or equal to 0 and less than or equal to 1
if c5.express == "LESSLESS" {
if x <= c5.center-2.0*c5.width {
y = 1.0
} else if x <= c5.center-c5.width {
y = -1.0/c5.width*(x-(c5.center-2.0*c5.width)) + 1.0
} else {
y = 0.0
}
} else if c5.express == "LESS" {
if x <= c5.center-2.0*c5.width {
y = 0.0
} else if x <= c5.center-c5.width {
y = 1.0/c5.width*(x-(c5.center-c5.width)) + 1.0
} else if x <= c5.center {
y = -1.0/c5.width*(x-(c5.center-c5.width)) + 1.0
} else {
y = 0.0
}
} else if c5.express == "COMMON" {
if x <= c5.center-c5.width {
y = 0.0
} else if x <= c5.center {
y = 1.0/c5.width*(x-c5.center) + 1.0
} else if x <= c5.center+c5.width {
y = -1.0/c5.width*(x-c5.center) + 1.0
} else {
y = 0.0
}
} else if c5.express == "MORE" {
if x <= c5.center {
y = 0.0
} else if x <= c5.center+c5.width {
y = 1.0/c5.width*(x-(c5.center+c5.width)) + 1.0
} else if x <= c5.center+2.0*c5.width {
y = -1.0/c5.width*(x-(c5.center+c5.width)) + 1.0
} else {
y = 0.0
}
} else if c5.express == "MOREMORE" {
if x <= c5.center+c5.width {
y = 0.0
} else if x <= c5.center+2.0*c5.width {
y = 1.0/c5.width*(x-(c5.center+2.0*c5.width)) + 1.0
} else {
y = 1.0
}
} else {
fmt.Println("MF5 func_X(): wrong expression")
os.Exit(1)
}
return y
}
/////////////////////////////
type action_MF5 struct { // Base class for action_MF5
center float64
width float64
express string
x float64
y float64
}
type action_MF3 struct { // Base class for action_MF3
center float64
width float64
express string
x float64
y float64
}
func new_action_MF5(_center, _width float64, _express string) *action_MF5 {
a5 := new(action_MF5)
a5.center = _center
a5.width = _width
a5.express = _express
if a5.express == "LESSLESS" {
a5.x = a5.center - 2.0*a5.width
} else if a5.express == "LESS" {
a5.x = a5.center - a5.width
} else if a5.express == "COMMON" {
a5.x = a5.center
} else if a5.express == "MORE" {
a5.x = a5.center + a5.width
} else if a5.express == "MOREMORE" {
a5.x = a5.center + 2.0*a5.width
} else {
fmt.Println("new_action_MF5: wrong scale expression")
os.Exit(-1)
}
a5.y = 0.0
return a5
}
func new_action_MF3(_center, _width float64, _express string) *action_MF3 {
a3 := new(action_MF3)
a3.center = _center
a3.width = _width
a3.express = _express
if a3.express == "LESS" {
a3.x = a3.center - a3.width
} else if a3.express == "COMMON" {
a3.x = a3.center
} else if a3.express == "MORE" {
a3.x = a3.center + a3.width
} else {
fmt.Println("new_action_MF3: wrong scale expression")
os.Exit(-1)
}
a3.y = 0.0
return a3
}
// The latter membership function (5 mountains) class
func (a5 *action_MF5) func_Y() float64 {
return a5.y
}
// The latter membership function (3 mountains) class
func (a3 *action_MF3) func_Y() float64 {
return a3.y
}
func (a5 *action_MF5) func_Max(b float64) {
a5.y = max_2(b, a5.y)
}
func (a3 *action_MF3) func_Max(b float64) {
a3.y = max_2(b, a3.y)
}
func (a5 *action_MF5) func_X() float64 {
return a5.x
}
func (a3 *action_MF3) func_X() float64 {
return a3.x
}
func fuzzy_reasoning(temp, humi float64) float64 {
// Temperature(former)
Temp_Less := new_condition_MF3(20, 10, "LESS")
Temp_Common := new_condition_MF3(20, 10, "COMMON")
Temp_More := new_condition_MF3(20, 10, "MORE")
// Humidity(former)
Humi_Less := new_condition_MF3(50, 20, "LESS")
Humi_Common := new_condition_MF3(50, 20, "COMMON")
Humi_More := new_condition_MF3(50, 20, "MORE")
// Switch(前件部)
Switch_Less := new_action_MF3(0,1,"LESS")
Switch_Common := new_action_MF3(0,1,"COMMON")
Switch_More := new_action_MF3(0,1,"MORE")
// [Rule 01]
Rule01 := min_2(Temp_More.func_X(temp), Humi_More.func_X(humi))
Switch_Less.func_Max(Rule01) // the latters values are overwritten if the value is large enough.
fmt.Println("Rule01", Rule01)
// [Rule 02]
Rule02 := min_2(Temp_Common.func_X(temp), Humi_More.func_X(humi))
Switch_Common.func_Max(Rule02) // the latters values are overwritten if the value is large enough.
fmt.Println("Rule02", Rule02)
// [Rule 03]
Rule03 := min_2(Temp_More.func_X(temp), Humi_Common.func_X(humi))
Switch_Less.func_Max(Rule03) // the latters values are overwritten if the value is large enough.
fmt.Println("Rule03", Rule03)
// [Rule 04]
Rule04 := min_2(Temp_Less.func_X(temp), Humi_Less.func_X(humi))
Switch_More.func_Max(Rule04) // the latters values are overwritten if the value is large enough.
fmt.Println("Rule04", Rule04)
// Reasoning calculations
numerator :=
Switch_Less.func_X()*Switch_Less.func_Y() +
Switch_Common.func_X()*Switch_Common.func_Y() +
Switch_More.func_X()*Switch_More.func_Y()
denominator :=
Switch_Less.func_Y() +
Switch_Common.func_Y() +
Switch_More.func_Y()
reasoning := numerator / denominator
return reasoning
}
func main(){
fmt.Println(fuzzy_reasoning(27.0, 67.0))
}
A社 CSVファイルパース用テストコード (用事が終わったら消すこと)
A社 CSVファイルパース用テストコード (用事が終わったら消すこと)
package main
import (
"encoding/csv"
"fmt"
"log"
"os"
"regexp"
"strings"
)
func main() {
file, err := os.Open("tracking_data.csv")
if err != nil {
log.Fatal(err)
}
defer file.Close()
r := csv.NewReader(file)
rows, err := r.ReadAll() // csvを一度に全て読み込む
if err != nil {
log.Fatal(err)
}
lat := [10000]string{}
lng := [10000]string{}
speed := [10000]string{}
// [][]stringなのでループする
for j, v := range rows {
if j == 0 {
continue // CSVのヘッダー行を無視
}
//fmt.Println(v[3])
// v[3]をバラバラに分解する
// v3 := regexp.MustCompile("[() ,]").Split(v[3], -1)
v3 := regexp.MustCompile("}, {").Split(v[3], -1)
for i, s := range v3 { // i: 数
//fmt.Printf("%s\n", s)
v31 := strings.Replace(s, "\"lat\": ", "", -1)
v32 := strings.Replace(v31, "\"lng\": ", "", -1)
v33 := strings.Replace(v32, "[{", "", -1)
v34 := strings.Replace(v33, "}]", "", -1)
v35 := regexp.MustCompile(",").Split(v34, -1)
for k, s5 := range v35 {
//f64, _ := strconv.ParseFloat(s5, 64)
//fmt.Println("string", i, s5)
if k == 0 {
lat[i] = s5
} else {
lng[i] = s5
}
}
}
//fmt.Println(lat[0], lng[0], lat[19], lng[19])
//fmt.Println()
// v[4]をバラバラに分解する
v41 := strings.Replace(v[4], "[", "", -1)
v42 := strings.Replace(v41, "]", "", -1)
v43 := regexp.MustCompile(",").Split(v42, -1)
for k4, s4 := range v43 {
speed[k4] = s4
fmt.Println(k4, ",", lat[k4], ",", lng[k4], ",", speed[k4])
}
}
}
Golangによる、ODデータ(CSV)から領域内に含まれているデータのみを取り出して、ノード番号と経度と緯度を書き出すプログラム
ODデータ(csv):20220518weekday
領域データ(csv):yamaguchi_area
出力データ(csv):new_20220518weekday
その他: 年齢を乱数を使って適当に作成しているコードも入っている
// ~/yamaguchi/src_try1/others/main61.go
// Usage: go run main61.go 20220518weekday.csv new_20220518weekday.csv
package main
import (
"database/sql"
"encoding/csv"
"fmt"
"log"
"math/rand"
"os"
"strconv"
_ "github.com/lib/pq"
)
func main() {
file, err := os.Open("yamaguchi_area.csv")
if err != nil {
log.Fatal(err)
}
defer file.Close()
r := csv.NewReader(file)
rows, err := r.ReadAll() // csvを一度に全て読み込む
if err != nil {
log.Fatal(err)
}
str := "SELECT ST_Covers(st_geomfromtext('POLYGON(("
// 行ごとに
for i, row := range rows {
if i == 0 {
continue // CSVのヘッダー行を無視
}
str += row[1] + " " + row[2] + ", " // rowのままで取り出せば、文字列になっている
}
str1 := str[:len(str)-2] + "))'),st_geomfromtext('LINESTRING(" // 上記の最後の", "を削除して、文字列を追加
dbMap, err := sql.Open("postgres",
"user=postgres password=password host=192.168.0.23 port=15432 dbname=yama_db sslmode=disable")
log.Println("------------------ map db open ------------------")
if err != nil {
log.Fatal("OpenError: ", err)
}
defer dbMap.Close()
///////////////////////////////////////
//file2, err2 := os.Open("20220518weekday.csv")
file2, err2 := os.Open(os.Args[1]) // 第1パラメータ
if err2 != nil {
log.Fatal(err2)
}
defer file2.Close()
r2 := csv.NewReader(file2)
rows2, err2 := r2.ReadAll() // csvを一度に全て読み込む
if err != nil {
log.Fatal(err2)
}
file3, err3 := os.Create(os.Args[2]) // 第2パラメータ
if err3 != nil {
panic(err)
}
w := csv.NewWriter(file3)
var id int
for _, row := range rows2 {
//if i == 0 {
// continue // CSVのヘッダー行を無視
//}
str2 := str1 + row[0] + " " + row[1] + ", " + row[2] + " " + row[3]
str2 += ")'))"
fmt.Println(str2)
rows1, err := dbMap.Query(str2)
if err != nil {
log.Fatal(err)
}
defer rows1.Close()
//var dt string
var dt bool
for rows1.Next() {
if err := rows1.Scan(&dt); err != nil {
fmt.Println(err)
}
// fmt.Println(dt)
if dt {
//if err := rows.Scan(&id, &age, &type1, &departure_name, &departure_number, &departure_lat, &departure_lng, &arrival_name, &arrival_number, &arrival_lat, &arrival_lng); err != nil {
// fmt.Println(err)
// 上記のSQLのフォームと同じ形でcsvファイルを作る
var age int
fmt.Println("row[4]:", row[4])
// id_str := strconv.Itoa(id) // idを文字列に
if row[4] == "10-15" {
age = 10 + rand.Intn(5)
} else if row[4] == "15-29" {
age = 15 + rand.Intn(5)
} else if row[4] == "20-24" {
age = 20 + rand.Intn(5)
} else if row[4] == "25-29" {
age = 25 + rand.Intn(5)
} else if row[4] == "30-34" {
age = 30 + rand.Intn(5)
} else if row[4] == "35-39" {
age = 35 + rand.Intn(5)
} else if row[4] == "40-44" {
age = 40 + rand.Intn(5)
} else if row[4] == "44-49" {
age = 45 + rand.Intn(5)
} else if row[4] == "50-54" {
age = 50 + rand.Intn(5)
} else if row[4] == "55-59" {
age = 55 + rand.Intn(5)
} else if row[4] == "60-64" {
age = 60 + rand.Intn(5)
} else if row[4] == "65-69" {
age = 65 + rand.Intn(5)
} else if row[4] == "70-74" {
age = 70 + rand.Intn(5)
} else if row[4] == "75-80" {
age = 75 + rand.Intn(5)
} else if row[4] == "80-84" {
age = 80 + rand.Intn(5)
} else if row[4] == "85-89" {
age = 85 + rand.Intn(5)
} else if row[4] == "90-94" {
age = 90 + rand.Intn(5)
} else if row[4] == "95-99" {
age = 95 + rand.Intn(5)
} else {
age = 15 + rand.Intn(65) // 15箸ｷ79までの乱数
}
type1 := "resident"
departure_name := ""
_row1, _ := strconv.ParseFloat(row[1], 64)
_row0, _ := strconv.ParseFloat(row[0], 64)
departure_number, departure_lng, departure_lat := fixPosition(dbMap, _row1, _row0) // row[1], row[0]の順番に注意
arrival_name := ""
_row3, _ := strconv.ParseFloat(row[3], 64)
_row2, _ := strconv.ParseFloat(row[2], 64)
arrival_number, arrival_lng, arrival_lat := fixPosition(dbMap, _row3, _row2) // row[3], row[2]の順番に注意
output := []string{fmt.Sprint(id), fmt.Sprint(age), type1, departure_name, fmt.Sprint(departure_number), fmt.Sprint(departure_lat), fmt.Sprint(departure_lng), arrival_name, fmt.Sprint(arrival_number), fmt.Sprint(arrival_lat), fmt.Sprint(arrival_lng)}
//output := []string{row[0], row[1], row[2], row[3], row[4]}
fmt.Println("output:", output)
if err = w.Write(output); err != nil {
log.Fatal(err)
}
id++ // idの加算
}
}
err = rows1.Err()
if err != nil {
panic(err)
}
defer w.Flush()
if err := w.Error(); err != nil {
log.Fatal(err)
}
}
}
// 指定した座標に近いDB上の座標を取得
func fixPosition(db *sql.DB, _x1, _y1 float64) (int, float64, float64) {
// Scan用の仮変数
var source int
var longitude float64
var latitude float64
var dist float64
upperLimitMeter := 1500.0 // 近傍ノードの上限を1500 mに設定
str := fmt.Sprintf(
// 修正前: ways (道) の中から最近傍を取得
// "SELECT source, x1 AS longitude, y1 AS latitude, ST_Distance('SRID=4326;POINT(%v %v)'::GEOGRAPHY, the_geom) AS dist FROM ways WHERE ST_DWithin(the_geom, ST_GeographyFromText('SRID=4326;POINT(%v %v)'), %.1f) ORDER BY dist LIMIT 1",
// 修正後: ways_vertices_pgr (点座標) の中から最近傍を取得
"SELECT id AS source, lon AS longitude, lat AS latitude, ST_Distance('SRID=4326;POINT(%v %v)'::GEOGRAPHY, the_geom) AS dist FROM ways_vertices_pgr WHERE ST_DWithin(the_geom, ST_GeographyFromText('SRID=4326;POINT(%v %v)'), %.1f) ORDER BY dist LIMIT 1",
_x1, _y1, _x1, _y1, upperLimitMeter,
)
//fmt.Println(str)
rows, err := db.Query(str)
if err != nil {
log.Fatal(err)
}
defer rows.Close()
foundGoodMapNode := false
for rows.Next() {
foundGoodMapNode = true
if err := rows.Scan(&source, &longitude, &latitude, &dist); err != nil {
fmt.Println(err)
}
//fmt.Println(source, longitude, latitude, dist)
}
if !foundGoodMapNode {
log.Println("Warning: in func fixPosition: Good Map Node not found for query point (",
_x1, ",", _y1, ")")
}
return source, longitude, latitude
}
Golang 数値を文字列に変換する方法
strconv.FormatFloatだの、strconv.FormatIntだの、色々あるけど、
fmt.Sprint(x) xは、整数でも実数でも可
で十分だと思う。
『(私(智一)は、ジーパンとスニーカーと数珠持参で参加予定です)』
私が自分のブログで、頻繁に、短いプログラムをアップロードしているのは、マニュアル読んだって、APIの使い方が分からないからです。
I frequently upload short programs on my blog because I don't know how to use the API even after reading the manual.
このようなマニュアル読んでもさっぱり分からないし、サンプルプログラムは、私のやりたいこととズレています。
I have no idea what I'm doing by reading these manuals, and the sample programs are out of sync with what I want to do.
ですので、以下のように、
So, as shown in the following
実際に、自分で書いて動いたコードを、小まめに残するようにしています。
In reality, I try to keep a small code that I have written and worked with.
他の人の役に立つかどうかは、二の次です。
Whether it is useful to others is secondary.
この方法に名前をつけるとすれば「具体例ベース」というのかもしれません。
If I had to give a name to this method, it might be called "concrete example-based".
それはさておき。
Aside from that.
-----
イベントの招待状などで、『平服にてご参加下さい』という文言が入っていることがありますが ――
In invitations to events, you may see the phrase, "Please attend in plain clothes.
私に言われれば、これは、最低最悪のホスピタリティです。
If you ask me, this is hospitality at its worst.
つまり『礼服はやめてね』と言っているだけで、カジュアルのレベルの判断をゲストに押しつける、無責任極まりない要求であるからです。
In other words, he/she is simply saying, 'Please don't wear formal wear,' and you are forced to judge the level of casual wear. This is an extremely irresponsible request.
ゲスト(招待客)は、カジュアルのレベルを間違えて、会場で恥しい思いをするかもしれません ―― しかし、そういう配慮をするホスト(主催者)には、滅多にお目にかかることができません。
Guests (invitees) may be embarrassed at the venue because of the wrong level of casualness -- but I rarely see a host (organizer) who takes such considerations into account.
-----
先日、父と母の納骨供養の案内を出しました。
I recently sent out information about the event laying their ashes to rest for my father and mother.
その中で、私は、ドレスコードを以下のような文章で、正確に規定しました。
In it, I have defined the dress code precisely in the following sentence.
『ご都合がよろしければ、平服にて御気軽にお立ち寄りをご検討頂ければ幸いです』
I hope you will consider stopping by in plain clothes if it is convenient for you.
『(私(智一)は、ジーパンとスニーカーと数珠持参で参加予定です)』
I (Tomoichi) will wear jeans, sneakers and prayer beads.
このように、ホストが、ホスト自身のドレスコードを具体的に提示することで、ゲストの負担を減らすことができます。
In this way, the host can reduce the burden on the guests by providing them with a specific dress code for themselves.
これが、「具体例ベース」です。
It is "concrete example-based".
-----
今後、「平服」を具体例で示さないホストには、このブログのURLをメールで送りつけようと考えています。
In the future, I will email the URL of this blog to hosts who do not provide specific examples of "plain clothes".
golangによるcsvファイルのライン単位での書き出し方法
Keyword: golang csv write 書き出し ライン
package main
import (
"database/sql"
"encoding/csv"
"fmt"
"log"
"os"
_ "github.com/lib/pq"
)
func main() {
file, err := os.Open("yamaguchi_area.csv")
if err != nil {
log.Fatal(err)
}
defer file.Close()
r := csv.NewReader(file)
rows, err := r.ReadAll() // csvを一度に全て読み込む
if err != nil {
log.Fatal(err)
}
str := "SELECT ST_Covers(st_geomfromtext('POLYGON(("
// 行ごとに
for i, row := range rows {
if i == 0 {
continue // CSVのヘッダー行を無視
}
str += row[1] + " " + row[2] + ", " // rowのままで取り出せば、文字列になっている
}
str1 := str[:len(str)-2] + "))'),st_geomfromtext('LINESTRING(" // 上記の最後の", "を削除して、文字列を追加
dbMap, err := sql.Open("postgres",
"user=postgres password=password host=192.168.0.23 port=15432 dbname=yama_db sslmode=disable")
log.Println("------------------ map db open ------------------")
if err != nil {
log.Fatal("OpenError: ", err)
}
defer dbMap.Close()
///////////////////////////////////////
file2, err2 := os.Open("20220518weekday.csv")
if err2 != nil {
log.Fatal(err2)
}
defer file2.Close()
r2 := csv.NewReader(file2)
rows2, err2 := r2.ReadAll() // csvを一度に全て読み込む
if err != nil {
log.Fatal(err2)
}
file3, err3 := os.Create("testtest.csv")
if err3 != nil {
panic(err)
}
w := csv.NewWriter(file3)
for _, row := range rows2 {
//if i == 0 {
// continue // CSVのヘッダー行を無視
//}
str2 := str1 + row[0] + " " + row[1] + ", " + row[2] + " " + row[3]
str2 += ")'))"
//fmt.Println(str2)
rows1, err := dbMap.Query(str2)
if err != nil {
log.Fatal(err)
}
defer rows1.Close()
//var dt string
var dt bool
for rows1.Next() {
if err := rows1.Scan(&dt); err != nil {
fmt.Println(err)
}
// fmt.Println(dt)
if dt {
output := []string{row[0], row[1], row[2], row[3], row[4]}
//fmt.Println("output:", output)
if err = w.Write(output); err != nil {
log.Fatal(err)
}
}
}
err = rows1.Err()
if err != nil {
panic(err)
}
defer w.Flush()
if err := w.Error(); err != nil {
log.Fatal(err)
}
}
}重要なのは、以下のコード
file3, err3 := os.Create("testtest.csv")
if err3 != nil {
panic(err)
}w := csv.NewWriter(file3)
output := []string{row[0], row[1], row[2], row[3], row[4]}
//fmt.Println("output:", output)if err = w.Write(output); err != nil {
log.Fatal(err)
}defer w.Flush()