How to extract data from a plot for various values of X and Y axis?

I have a speed vs time plot. Now I have to extract the speed data for a particular time which is used in a 'for loop'.

For example: for t=0:1:10

First iteration, I have to get the speed data for t=0;

Second iteration obtain the value of speed @ t= 1 sec ...... and so on...

[KSSV]

YOu have data already in hand? What plot's you have in hand?

[Praveen Kumar]

I have a speed vs time plot.

Answer 1

[Sathyanarayan Rao]

speed = [1 2 3 4 5]

time = [0.03 0.05 0.07 0.09 0.1]

h = plot(time,speed);

xdata = (get(h, 'XData'))

ydata = (get(h, 'YData'))

[Praveen Kumar]

In this case, xdata will be

xdata =

    0.0300    0.0500    0.0700    0.0900    0.1000

ydata =

     1     2     3     4     5

But i want values of xdata for any values between 0 and 0.1.

For example: xdata= [0.01 0.02 0.03 ..... 0.1], 10 data points.

Need not be same as the number of input data in time(5 discrete points in your case)