SUM函数语法问题
请各位专家、大神帮忙看下这个SUM函数有什么语法问题？((SUM(LAST_N(FIRST_N(PWELCH(.MDI_Demo_Vehicle.aaaaaaa_maintain.chassis_accelerations.longitudinal.values*9.8,1024, 99.9999999983,Rectangular_window(1024),0),22),17)*1)+SUM(LAST_N(FIRST_N(PWELCH(.MDI_Demo_Vehicle.aaaaaaa_maintain.chassis_accelerations.longitudinal.values*9.8,1024, 99.9999999983,Rectangular_window(1024),0),513),496)*2/TRANSPOSE(SERIES(2.0508,50,496))*2/TRANSPOSE(SERIES2(2.0508,50,496))))*0.967)**0.5
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