쉬워지는 과학,IDL 프로그래밍의 기초. > 지구과학/천문학

1. IDL 개요································································································· 3

1.1 IDL이란································································································ 3

1.2 IDL 학습 교재 ···················································································· 4

1.3 IDL 프로그램 개발 환경···································································· 7

1.4 프로그램 예문의 표현 ······································································ 9

2. IDL 시작하기······················································································· 11

2.1 IDL 시작과 종료················································································ 11

2.2 IDL 프로그램의 컴파일.실행.중지.재실행······································ 13

2.3 명령행 창과 IDL 프롬프트에서 명령어 입력································ 16

2.4 사용자 환경 설정과 시스템 변수···················································· 17

2.5 IDL 특수문자······················································································ 19

2.6 print와 help 명령어··········································································· 20

3. 변수········································································································ 23

3.1 변수명 명명························································································· 23

3.2 변수형 종류························································································· 24

3.3 변수형 선언························································································· 25

3.4 변수형 변환························································································· 28

4. 배열 기초······························································································· 31

4.1 배열의 구성요소와 저장 방식··························································· 31

4.2 배열 생성과 배열 생성함수······························································· 32

4.3 배열 첨자의 표현················································································ 35

4.4 배열 첨자를 이용한 추출··································································· 38

4.5 배열 연산······························································································ 39

5. 배열 응용································································································ 41

5.1 배열 차원의 변경················································································· 41

5.2 배열 요소의 회전.역전.전치.이동······················································ 42

5.3 배열 크기의 변경················································································· 45

5.4 부분 배열의 생성과 특정 열.행의 삭제············································· 49

5.5 배열 속성 정보를 얻기 위한 함수 ····················································· 51

6. 식과 연산자······························································································ 57

6.1 식의 변수형 결정··················································································· 57

6.2 산술 연산자와 우선순위······································································· 58

6.3 배열의 산술 연산··················································································· 60

6.4 최소 연산자, 최대 연산자, 나눔자······················································ 62

6.5 배열곱 연산자와 행렬곱 연산자·························································· 63

6.6 관계 연산자····························································································· 65

6.7 논리 연산자····························································································· 67

6.8 3치 연산자······························································································· 73

7. 구조체········································································································ 75

7.1 익명 구조체····························································································· 75

7.2 지명 구조체····························································································· 77

7.3 내포형 구조체························································································· 78

7.4 구조체 배열····························································································· 79

7.5 구조체와 관련된 함수의 활용······························································· 79

8. 검색과 정렬································································································ 81

8.1 배열의 조건 검색····················································································· 81

8.2 배열 정렬·································································································· 83

8.3 유일한 배열값의 추출············································································· 84

9. 프러시저와 함수························································································ 85

9.1 주 프로그램.프러시저.함수의 정의······················································· 85

9.2 프러시저와 함수 파일명의 명명··························································· 89

9.3 파라미터와 키워드·················································································· 89

9.4 인수 전달 메커니즘················································································· 91

9.5 파라미터와 키워드의 점검····································································· 94

9.6 컴파일········································································································ 96

9.7 일괄처리 작업··························································································· 98

9.8 전역변수···································································································· 100

10. 블록문과 제어문······················································································ 105

10.1 블록문····································································································· 106

10.2 if문··········································································································· 106

10.3 case문··································································································· 108

10.4 for문········································································································ 109

10.5 while문··································································································· 111

10.6 repeat문·································································································· 112

10.7 return문··································································································· 113

10.8 goto문···································································································· 114

10.9 switch문································································································ 115

10.10 break문································································································ 116

10.11 continue문··························································································· 117

제2부 데이터 입출력

11. 데이터 포맷의 유형·················································································· 121

11.1 ASCII 데이터와 이진 데이터································································ 121

11.2 과학 데이터 포맷··················································································· 122

12. 화면 출력과 키보드 입력········································································ 125

12.1 화면 출력(표준 출력)············································································ 125

12.2 키보드 입력(표준 입력)········································································ 127

12.3 문자열 변수로부터 수치 데이터의 입출력········································· 130

13. 파일 입출력······························································································ 131

13.1 파일 열기································································································· 131

13.2 파일 선택······························································································· 133

13.3 파일 정보 얻기······················································································ 135

13.4 ASCII 파일의 읽기와 쓰기··································································· 136

13.5 이진 파일의 읽기와 쓰기······································································ 140

13.6 이진 데이터의 바이트 스와핑······························································· 143

13.7 파일 닫기·································································································· 145

14. 템플릿을 이용한 파일 읽기···································································· 147

14.1 ASCII 파일 읽기······················································································ 147

14.2 이진 파일 읽기························································································ 150

15. NetCDF 파일의 입출력·········································································· 153

15.1 NetCDF 개요························································································· 153

15.2 NetCDF 파일에서 변수 읽기······························································· 155

15.3 NetCDF 파일에서 속성 읽기······························································· 157

15.4 NetCDF 파일 쓰기··············································································· 158

제3부 그래픽 출력

16. 그래픽 출력의 기초···················································································· 163

16.1 그래픽스 디바이스의 선택과 환경 설정··············································· 163

16.2 색 모델 선택······························································································ 166

17. 그래픽 출력 장치························································································ 169

17.1 윈도 출력··································································································· 169

17.2 포스트스크립트 출력··············································································· 174

17.3 프린터 출력······························································································· 180

17.4 원래 출력 장치로의 전환········································································ 183

18. 선 그래프 그림 ·························································································· 185

18.1 선 그래프 그림 그리기············································································ 185

18.2 선 그래프 그림의 좌표와 좌표변환······················································ 189

18.3 선 그래프 그림의 맞춤 설정··································································· 191

18.4 plots 프러시저····················································································· 208

18.5 그림 위치 설정····················································································· 208

18.6 그림 속성과 관련된 시스템 변수·························································· 211

18.7 선 그래프 그림의 응용 사례································································· 211

19. 막대그림과 히스토그램··········································································· 227

19.1 막대그림································································································· 227

19.2 히스토그램····························································································· 228

19.3 에러 바····································································································· 231

19.4 막대그림, 히스토그램, 에러 바의 응용 사례······································ 232

20. 등치선 그림····························································································· 241

20.1 등치선 그림의 개요··············································································· 241

20.2 등치선 그림의 맞춤 설정····································································· 243

20.3 불규칙 격자 데이터의 등치선 그림····················································· 246

20.4 등치선 그림의 용용 사례····································································· 247

21. 면 그림····································································································· 251

21.1 그물망 면 그림의 개요·········································································· 251

21.2 그물망 면 그림의 맞춤 설정································································ 253

21.3 불규칙 격자 데이터의 면 그림···························································· 255

21.4 음영 면 그림의 개요············································································· 257

21.5 음영 면 그림의 맞춤 설정···································································· 258

21.6 면 그림의 응용 사례············································································· 261

22. 지도 기반 그림······················································································· 265

22.1 지도 투영법의 설정·············································································· 265

22.2 대륙 외곽선의 중첩·············································································· 271

22.3 지도 격자선의 중첩·············································································· 272

22.4 지도 투영법별 특징·············································································· 273

22.5 지도 위에 등치선 그림 그리기···························································· 280

22.6 지도 위에 이미지 그리기····································································· 283

22.7 지도 기반 그림의 응용 사례································································ 287

23. 이미지 데이터························································································· 299

23.1 색상 모드의 설정·················································································· 299

23.2 이미지 표출·························································································· 303

23.3 이미지 표출의 순서와 위치 설정························································ 305

23.4 이미지 크기의 조절·············································································· 306

23.5 비트맵 형식 파일로 이미지 저장························································ 309

23.6 벡터 형식 파일로 이미지 저장···························································· 314

23.7 이미지 데이터의 응용 사례·································································· 315

부록 수학 관련 루틴과 유용한 팁

1. 수학과 관련된 함수와 프러시저····························································· 325

2. 알아두면 유용한 팁·················································································· 335

*찾아보기······································································································· 338