i have some problem when use the specx_anal

From: Jing Yang (yangjing AT XXXXXX)
Date: Thu Mar 25 2004 - 17:54:32 MST

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hi!i want to use the function specx_anal(u,iopt,jave,pct) ,now i must make a detrend ,so i use the function as specx_anal(u,1,21,0.1),but the output plot is unbelievable.if i use the function as specx_anal(u,0,21,0.1),it is right though the output plot has a super-low frequent change.However ,if i firstly use the function "dtrend_quadratic" to make a detrend then use the "specx_anal(u,0,21,0.1)",the output is right!i don't know why? i repeat it for other fields and find the same problem .could you help me ?

jing

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