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我需要平方根和幂的帮助。我正在计算平均误差，我被告知要为每个元素执行此操作：

dmgfeerr = sqrt(dmgherr**2 - dfeherr**2).

但我收到一条错误消息：TypeError: only size-1 arrays can be converted to Python scalars。

下面是数据。它的东西叫做正交误差：

        dfeh = d[1].data['Fe_H_2']
        dmgh = d[1].data['MG_H']
        dnh = d[1].data['N_H']
        dch = d[1].data['C_H']
        dalh = d[1].data['AL_H']
        dmnh = d[1].data['MN_H']

        dcfe = (dch) - (dfeh)
        dnfe = (dnh) - (dfeh)
        dalfe = (dalh) - (dfeh)
        dmnfe = (dmnh) -(dfeh)
        dmgfe = (dmgh) - (dfeh)

        dfeherr = d[1].data['FE_H_ERR_2']
        dmgherr = d[1].data['MG_H_ERR']
        dalherr = d[1].data['AL_H_ERR']
        dcherr = d[1].data['C_H_ERR']
        dnherr = d[1].data['N_H_ERR']
        dmnherr =d[1].data['MN_H_ERR']


        dcfeerr = dcherr - dfeherr
        dnfeerr = dnherr - dfeherr
        dalfeerr = dalherr - dfeherr
        dmnfeerr = dmnherr - dfeherr
        dmgfeerr = dmgherr - dfeherr
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