Octave realtime plot

[Gabriel Soo]

And how to plot a realtime graph? The signal i read from my arduino is : 

1111.PNG

Then i use this coding in my octave to read and plot the graph:

srl_flush(s);       %Flush the pending input/output.

y_temp = cell(10,1)

y = 0

while true

  for i = 1:10

    y_serial = str2num(char(srl_read(s,5)))  %Convert the string (or character array) s to a number (or an array).

    y_temp {i,1} = y_serial

  endfor

  y = cat(1, y, y_temp{1:10})

  plot(y)

  pause(1)

endwhile

srl_close(s)

The result:

2222.PNG

Why there is a single digit data there????

1111.PNG
Description: PNG image

2222.PNG
Description: PNG image