what does this error message mean? readtalble isn't working and when I included ops it at changes my data from my text file. Why wont it format it exactly as the text file but in a table?

function frstarrv()
% %I want to read the line display and look at the first event and use the
% %starting times to locate and graph the apporpriate waveforms

% % %read data of test file into a table
% opts = detectImportOptions('TEST0030_LINEDISPLAY.TXT');
T = readtable('TEST0030_LINEDISPLAY.TXT');
%index the channels in the first  event
a =  T(4:11,3);
%turn the table type to an  array
b = table2array(a);
%convert to string array
c = string(b);

%%call graphData for all of the channels in the event
e = zeros(8,1);
for n = 1:8
    %%I need extractBetween because my starting times array has extra two
    %%eztra zeros not found in the linedisplay or waveform file name 
    e(n) = extractAfter(c(n), '.');
    dir *e(n)*.csv;
    %    graphData();
end

end

[Image Analyst]

Unfortunately you forgot to attach 'TEST0030_LINEDISPLAY.TXT'. I'll check back later for it.

[Timothy Nsubuga]

Sorry, just attached it.

[Star Strider]

What data do you want from that file?

It’s not obvious what an ‘event’ is, or what defines it.

[Timothy Nsubuga]

An event is made up of a group of channels that the acoustic emissions system uses to determine the location of the signal. Its the channels in the bracket next to the *Gp #1 line. I want to check every channel in the third column and if it is in the * line with bracket, I would open the waveform .csv file using the time value to the left of that channel( directly left of the channel column) and graph them. I want to be able to get the first arrival time for each channel in each event using a Hilbert transform. Its proven too hard for me so now I'm just trying to take the time values for just the first event since I know what channels make the event by looking at the file. I plan to use these time values to open the corresponding waveform files, and get the first arrival for this first event using a hilbert transfrom. However, even this is not working...

[Walter Roberson]

You are not going to be able to read this file usefully using the table related operations.

You might be able to get somewhere with textscan()

However you would probably have a much easier time reading the file as a large character vector and then using regexp() to pull out pieces of it.