I have a long 3-columns table of numerical data. For example, a small piece of it looks like this:
-5.3986816409999996e+00 8.3394692357616169e-23 2.2891221151890116e-23
-5.3984375003749996e+00 8.1834931317429596e-23 2.7962314960022732e-23
-5.3981933597499996e+00 7.9967086078053667e-23 3.2928354334362533e-23
-5.3979492191249996e+00 7.7798165392355974e-23 3.7770639137136620e-23
-5.3977050784999996e+00 7.5336312057849817e-23 4.2470933118491389e-23
-5.3974609378749996e+00 7.2590772420102232e-23 4.7011532627697938e-23
-5.3972167972499996e+00 6.9571861716728761e-23 5.1375333330996674e-23
-5.3969726566249996e+00 6.6290925391538841e-23 5.5545894684658167e-23
-5.3967285159999996e+00 6.2760296523720059e-23 5.9507501919987393e-23
-5.3964843753749996e+00 5.8993249531280359e-23 6.3245225306694521e-23
-5.3962402347499996e+00 5.5003950322868833e-23 6.6744976470308050e-23
To be clear, the first column shows the time(t) and the other two indicate some other variables both as functions of time, let say f(t) and g(t). I want to calculate the time-derivative of each function and save it in a new data file. I'm not sure how should I handle this numerically. Any idea?