How to get the second lowest value in the vector

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RAJAN PRASAD
RAJAN PRASAD 2017-12-13
回答： Guillaume 2017-12-13
8241.78332137873 + 0.00000000000000i
38.9067789454279 + 0.00000000000000i
-1.83201864618279 + 0.00000000000000i
1.79315922840514 + 0.00000000000000i
-0.997840962168844 + 0.0656765880503442i
-0.997840962168844 - 0.0656765880503442i
0.995473996970605 + 0.0950343167256255i
0.995473996970605 - 0.0950343167256255i
0.557674959456530 + 0.00000000000000i
-0.545845972735913 + 0.00000000000000i
0.0257024618089396 + 0.00000000000000i
0.000121332964102069 + 0.00000000000000i
I am getting data like this in which the negative real value which is falling between -1 and 0 that is -0.545845972735913 i have to extract.In loop everytime i get this value which falls between -1 and 0 how to extract it.another one is
7992.04304121297 + 0.00000000000000i
29.5741862804080 + 0.00000000000000i
2.79371824910742 + 0.00000000000000i
-1.45521487567079 + 0.00000000000000i
0.997843485528069 + 0.0656382387725411i
0.997843485528069 - 0.0656382387725411i
-0.998639864116128 + 0.0521384867259113i
-0.998639864116128 - 0.0521384867259113i
-0.687183739469949 + 0.00000000000000i
0.357945902497281 + 0.00000000000000i
0.0338132718336987 + 0.00000000000000i
0.000125124451280362 + 0.00000000000000i
in this one is -0.687183739469949

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回答（1 个）

Guillaume
Guillaume 2017-12-13
I'm not sure I've understood what you want. If you want the 2nd lowest value greater than -1:
In <R2017b:
realvalues = real(yourvector);
[~, idx] = sort(realvalues (realvalues >= -1 & realvalues =< 0));
lowest2nd = yourvector(idx(2));
In R2017b:
min2 = mink(yourvector(real(yourvector) >= -1 & real(yourvector) =< 0), 2, 'ComparisonMethod', 'real')
lowest2nd = min2(2);

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