[R] how to check stationary/non-stationary time series data?

[sagarnikam123]

i have following file
http://r.789695.n4.nabble.com/file/n4495257/1A2X_B_phi_psi_pot_r_k.txt
1A2X_B_phi_psi_pot_r_k.txt 

but i don't know which test used to check non-stationary ness of time
series?

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