Hi...
I am dealing with 600000 - 700000 points of data. they show a stress-strain relation.
As it involves thousands of points, My computer through excel runs very slow. I have been suggested to reduce the data by taking just representative points which are still showing similar look of the graph.

The data is like below (700000 rows)

Compressive strain Compressive stress
(%) (MPa)

0.00051 0.00021
0.00051 0.00021
0.00051 0.00021
0.00051 0.00021
0.00051 0.00022
0.00051 0.00022
0.00051 0.00022
0.00051 0.00022
0.00051 0.00023
0.00051 0.00023
0.00051 0.00023
0.00051 0.00024
...

76.03861 11.68763
76.03912 11.68776
76.03912 11.68789
76.03912 11.68803
76.03963 11.68816
76.03963 11.6883
76.03963 11.68844
76.04014 11.68859
76.04014 11.68874

If I want to have only 10000 points of data but still give the same information as its original plots of 700000.Could someone tell me how to exclude unnecessary data using excel (2010)?

Many thanks.
Abdur