Serial read Arduino data

Greetings to the forum. This is my first post around here. Mu main task is the following,

I am trying to read sensor data from arduino in matlab through serial port. Then I will try to calibrate my sensor but not using any of the predefined functions. I have written a simple coad that sends serial data separated by the special character \t. Then having that in mind I am trying to separate them in columns in my .m script.

Code so far is the following one :

 clear all;
 clc;
 sFile = 'AcceDualAxis.csv';
 delete(instrfindall);
 s1 = serial('COM8'); 
 s1.BaudRate = 500000;
 fopen(s1);
 s1.ReadAsyncMode = 'continuous';
 readasync(s1);
 
 mData = [];
 time = 0;
 count = 0;
 
 tic;
while(toc<10)
      sSerialData = fread(s1,1,'uchar')
      sSerialData = fscanf(s1, '%c'); 
      count = count + 1;
      time(count) = toc;
      flushinput(s1);
      t = (str2double(strsplit(sSerialData, '\t'));
      disp(t);
  
end
      delete(instrfindall);
      csvwrite(sFile,mData);
      

Main idea is the following one. In the near future I will try to break down specific tasks with specific functions. By sending a special character from matlab through serial to arduino I will try to read each one of the three axes and execute a specific preocedure for each one of them.

First way is the following one : By sending a special character I will try to read specific sensors ( 'R' --> read accelerometer - 'L' --> read gyroscope etc...)

Second way is the following one : Having all data in my serial monitor, then each function will try to read a specific part of the data. Lets say for example, that 'Gyro_cal' will try to read only the three first columns of data.

Each way of these have the same deadlock. When I try to call 't' for reading my data I only get the last line of them. 't' only saves my last line of data so when I try to read a specific section of them I cannot do that.

So i need some help with the following:

*Try to organize my data into columns (something that i have already achieved)

*Try to save all data in matrix form, so i can call specific lines and columns of them.

*Re- arrange them in order to cal them with the specific time that they occured ( this will be helpful for later stages of numerical integration)

Any help would be much appreciated.

Thanks in advance, sorry for any mistakes to my post.

Best wishes,

Koutsoukos Theodosis