i have sensor which gives voltage output based on change in radiant temperature, the plot i am doing now is voltage signal in y axis and samples per trigger in x axis,
i want it to change the x axis to time.
plz anyone help.
Ah, your current x axis is not samples per trigger: it is sample number within the buffer.
So change your code to keep track of the number of times you have previously sampled. Then if you know your sampling frequency FS in Hz, use
Previous_Triggers = 0; %before loop
%in loop t = (Previous_Triggers * Samples_Per_Trigger + (0:Samples_Per_Trigger-1)) ./ FS; plot(t, V); Previous_Triggers = Previous_Triggers + 1;