We present MultiElec, an open source MATLAB based application for data analysis
of microelectrode array (MEA) recordings. MultiElec displays an extremely
user-friendly graphic user interface (GUI) that allows the simultaneous display and
analysis of voltage traces for 60 electrodes and includes functions for
activation-time determination, the production of activation- time heat maps with
activation time and isoline display. Furthermore, local conduction velocities are
semi-automatically calculated along with their corresponding vector plots. MultiElec
allows ad hoc signal suppression, enabling the user to easily and efficiently handle
signal artefacts and for incomplete data sets to be analysed. Voltage traces and
heat maps can be simply exported for figure production and presentation. In
addition, our platform is able to produce 3D videos of signal progression over all
60 electrodes. Functions are controlled entirely by a single GUI with no need for
command line input or any understanding of MATLAB code. MultiElec is open
source under the terms of the GNU General Public License as published by the
Free Software Foundation, version 3. Both the program and source code are
available to download from http://www.cancer.manchester.ac.uk/MultiElec/.

제 1편 : MATLAB 기본편
1. MATLAB 기본사용편 ···················· 003
1.1 MATLAB 시작하기 ·························· 003
명령창(command Window)에서의 입력 005
도움말(Help)의 이용 ······························· 007
1.2 입력 오류의 수정 ····························· 008
계산의 중지 ·············································· 009
MATLAB 종료하기 ································· 009
1.3 연산과 변수의 할당 ·························· 009
연산자 우선순위 ······································· 011
내장함수 ···················································· 012
1.4 데이터의 표현 ··································· 013
1.5 변수의 처리 ······································· 015
변수 이름 ·················································· 015
clear 명령어 ············································· 016
특수변수와 정수 ······································· 017
whos 명령어 ············································ 017
1.6 벡터와 행렬 ······································· 018
벡터 ··························································· 018
행렬 ·························································· 023
스크린 출력과 억제 ································· 024
1.7 랜덤(Random)수와 복소수 ·············· 025
랜덤 수 ····················································· 025
복소수 ······················································· 027
1.8 기호를 이용한 연산 ·························· 028
기호식에서의 치환 ··································· 029
1.9 코드 파일 ·········································· 030
스크립트 코드 파일 ································· 030
코멘트의 추가 ·········································· 032
함수 코드 파일 ···································· 033
사용자 정의함수 ······································ 036
1.10 간단한 그래프의 생성 ····················· 037
ezplot을 이용한 그래프 ·························· 037
plot을 이용한 그래프 ·························· 039
3차원 그래프 ··········································· 042
1.11 MATLAB과 엑셀(Excel)의 접속 043 엑셀 데이터 불러오기 ····························· 043
데이터 가져오기 옵션 ························· 046
스크립트 생성 옵션 ································· 049
함수 생성 옵션 ········································ 049
생성된 데이터를 엑셀파일로 저장하기 ·· 050

제 2편 : 연구논문
MultiElec: A MATLAB Based Application for MEA Data Analysis

1. Introduction 51
2. Materials and Methods 52
3. Software engineering and system requirements 53
4. Activation time determination and heat maps 55
5. Conduction velocities 57
6. 3D videos of signal progression 58
7. Conclusion 65
8. References 65