來自SORT的MATLAB文檔：If A has complex entries r and s,

sort orders them according to the

following rule: r appears before s in

sort(A) if either of the following

hold:abs(r) < abs(s)

abs(r) = abs(s) and angle(r) < angle(s)

換言之，具有復雜項的數組首先基于這些項的absolute value(即復數幅度)排序，并且任何具有相同絕對值的項都基于它們的phase angles排序。在The sort order for complex numbers is

lexicographic. If both the real and

imaginary parts are non-nan then the

order is determined by the real parts

except when they are equal, in which

case the order is determined by the

imaginary parts.

換言之，具有復雜條目的數組首先根據條目的實分量進行排序，而具有相等實分量的任何條目都將基于它們的虛分量進行排序。在

編輯：

如果要在MATLAB中重現numpy行為，一種方法是使用函數SORTROWS根據數組項的real和{a7}組件創建排序索引，然后將該排序索引應用于復雜值數組：>> r = roots(q); %# Compute your roots

>> [junk,index] = sortrows([real(r) imag(r)],[1 2]); %# Sort based on real,

%# then imaginary parts

>> r = r(index) %# Apply the sort index to r

r =

0.2694 - 0.3547i

0.2694 + 0.3547i

0.3369 - 0.1564i

0.3369 + 0.1564i

0.3528

1.3579 - 1.7879i

1.3579 + 1.7879i

2.4419 - 1.1332i

2.4419 + 1.1332i

2.8344

總結

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