select the row that contains the minimum of a column

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dolving
dolving 2014-6-27
回答： Star Strider 2014-6-27
I have this matrix:
results =
0.0260 0.1040 0.0030 0.0246 0.0264 4.8818
0.0430 0.1040 0.0030 0.0194 0.0238 5.0857
0.0600 0.1040 0.0030 0.0164 0.0223 5.2897
0.0260 0.0870 0.0030 0.0245 0.0263 5.0856
0.0430 0.0870 0.0030 0.0194 0.0237 5.2896
0.0600 0.0870 0.0030 0.0167 0.0221 5.4936
0.0260 0.0700 0.0030 0.0246 0.0259 5.2896
0.0430 0.0700 0.0030 0.0194 0.0233 5.4937
0.0600 0.0700 0.0030 0.0164 0.0217 5.6976
0.0260 0.1040 0.0065 0.0331 0.0413 0
0.0430 0.1040 0.0065 0.0269 0.0322 4.0227
0.0600 0.1040 0.0065 0.0207 0.0264 4.4647
0.0260 0.0870 0.0065 0.0330 0.0409 0
0.0430 0.0870 0.0065 0.0268 0.0319 4.4648
0.0600 0.0870 0.0065 0.0208 0.0261 4.9067
0.0260 0.0700 0.0065 0.0330 0.0397 4.4648
0.0430 0.0700 0.0065 0.0269 0.0306 4.9067
0.0600 0.0700 0.0065 0.0208 0.0249 5.3487
0.0260 0.1040 0.0100 NaN 0 0
0.0430 0.1040 0.0100 0.0578 0.0639 0
0.0600 0.1040 0.0100 0.0445 0.0423 0
0.0260 0.0870 0.0100 NaN 0 0
0.0430 0.0870 0.0100 0.0577 0.0628 0
0.0600 0.0870 0.0100 0.0446 0.0411 0
0.0260 0.0700 0.0100 NaN 0 0
0.0430 0.0700 0.0100 0.0576 0.0584 0
0.0600 0.0700 0.0100 0.0445 0.0367 4.8460
I want to select the row that contains the minimum nonzero value of the last column.
I tried:
[minVal rowInd]=min(nonzeros(results(:,6)))
minVal =
4.0227e+003
row_idx =
10
This does give the value i want, but not the right row (it must be row_idx=11).
Any ideas would be welcome!!

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采纳的回答

Guilherme Coco Beltramini
Use an auxiliary variable:
tmp = results(:,6); tmp(tmp==0) = NaN;
[minVal rowInd]=min(tmp)

更多回答（1 个）

Star Strider
Star Strider 2014-6-27
Test for the minimum first, then use find:
min6 = min(results((results(:,6) > 0),6));
ridx = find(results(:,6) == min6);

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