how to record many lines in the data reads when only one appliance is turned on to off and beside no other appliance is turned on?

only one appliance is turned on to off and beside no other appliance is turned on

[Walter Roberson]

The question is not clear .Where is the input from? Record to where ?

What does this have to do with MATLAB Compiler or MATLAB Coder?

[Jan]

What is an "appliance"? What does "recording" mean? What are "many lines"?

[Mohammad Junayed]

The algorithm recognizes the opening of a single appliance (electrical appliance) and counts the number of data from opening to closing of a single appliance

[Kevin Chng]

prefer you explain your intention with your code. it might help.

[Walter Roberson]

What is the input? A series of voltage readings perhaps, with the program having to deduce from the voltagess how many appliaces are active?

[Mohammad Junayed]

here i attached the file .

[Jan]

The relation between the question

"only one appliance is turned on to off and beside no other appliance is turned on"

and the code is not clear:

%% ******************************************************************************************************
% º¯ÊýÃû³Æ£ºEventLog
% º¯Êý¹¦ÄÜ£º±£´æʶ±ðʼþ»òÒì³£µ½txtÎı¾EventLog.txtÖÐ
% ÊäÈë²ÎÊý£º sVersion - °æ±¾ÐÅÏ¢
%           sCurrentTime - µ±Ç°²âÊÔʱ¼ä
%           sTime - ²âÊԼǼÄÚ±£´æµÄʱ¼ä
%           sEvent - ·¢ÉúµÄʼþ
% Êä³ö²ÎÊý£ºÎÞ
%% ******************************************************************************************************
function [ ] = EventLog(sFielsName, sVersion, sCurrentTime, sTime, sEvent)
fid = fopen(sFielsName,'a+');
fprintf(fid,'| %s |\t ',sVersion); 
fprintf(fid,'| %s |\t ',sCurrentTime); 
fprintf(fid,'| %s |\t ',sTime); 
fprintf(fid,'| %s \r\n', sEvent);  % »»ÐÐ
fclose(fid);

I do not think, that the term "appliance" help to understand, which problem you have.

By the way, you can simplify the code to:

...
fprintf(fid,'| %s |\t ',sVersion, sCurrentTime, sTime); 
fprintf(fid,'| %s \r\n', sEvent);  % »»ÐÐ
...

[Walter Roberson]

are we to assume that event entries will look like

dishwasher on
kitchen light off
refrigerator on
refrigerator off
refrigerator on
bathroom light on
refrigerator off
bathroom light off
dishwasher off

and the task is to count how many records there are between an on and the corresponding off, with no interest in the elapsed time??

[Mohammad Junayed]

The question is ;

The algorithm recognizes the opening of a single appliance and counts the number of data from opening to closing of a single appliance

Is to see how many lines the data reads when only one appliance is turned on to off and no other appliance is turned on ..

[Walter Roberson]

post a sample input file and a sample output