matlab 求曲线与x轴的正负面积之和y=[-61.429,-58.635,-57.02,-54.306,-53.42,-50.796,-49.6,-36.278,35.735,146.684,259.955,332.941,372.657,398.11,387.08,370.301,309.843,242.748,130.381,17.412,-57.716,-80.582,-72.352,-63.972]x=[0:1:23]每个y
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