scale x-axis

Hi,

I am very new to matlab... I have a 1D array of 45000 points they are sampled at 256Hz.

Now i want to plot the 1D array but on my x-axis i want to display the actual time, so 45000 * 1/256. How do i scale my x-axis?

Best regards, Thijs

Answer 1

[dpb]

Simplest (at cost of some extra memory) is to just define a t vector to plot against...

t=linspace(0,(length(data)-1)/256,length(data));  % set start,stop times, compute interval

or

t=[0:1/256:(45000-1)/256];   % set start, dt, compute end time

NB: the "-1" on overall duration since there's one fewer dt intervals than number of elements in vector...