I want to read String Using serial communication

My code is

s = serial('COM5');
set(s,'BaudRate',9600, 'Parity','none', 'Terminator', 'LF', 'InputBufferSize', 4500);
fopen(s);

fprintf(s, '$');

A = fgetl(s);
strlength = length(A);

while strlength < 4
A = fgetl(s);
strlength = length(A);
end

A

fclose(s);
delete(s)
clear s

on the other hand microcontroller continuously

 transmitting sting 012crlf

i just want to display first three digits wha should i do..??

Answer 1

[Walter Roberson]

Your code appears to be written to read lines until it finds one that is 4 or more characters long and then to display that line.

If all you want is to display the first three digits then just read a single line and display the first three characters of it.

A = fgetl(s);
A(1:3)

Answer 2

[Sagar Sojitra]

i mean my data is coming continuously and i need to continuously display it... daa is coming like

100crlf 120crlf 200crlf 040crlf

and i just want to display first three digit continuously so this will work...???