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标题: 急求！！corrcoef（X'）出现的矩阵中有一行一列都是NaN怎么办 [打印本页]

作者: ssxy60 时间: 2011-5-7 17:13
标题: 急求！！corrcoef（X'）出现的矩阵中有一行一列都是NaN怎么办
我将一组数据归一化后得到：
X=[

0.30406	0.42166	0.10803	0.04228	0.19040
0.14375	0.23663	0.20215	0.07292	0.12177
0.43544	0.35541	0.18663	0.03484	0.52739
0.16878	0.14623	0.16664	0.00526	0.33336
0.13996	0.31231	0.22833	0.02988	0.20139
0.33730	0.49316	0.29782	0.12475	0.42676
0.14435	0.21900	0.07913	0.02367	0.13561
0.23287	0.70773	0.43657	0.02969	0.20401
0.41344	0.47421	0.32271	0.42811	0.32469
0.79015	0.80677	0.48430	0.21283	0.75542
0.60780	0.60806	0.61804	0.18940	0.58265
0.23335	0.14251	0.16559	0.01418	0.19292
0.28792	0.40717	0.30047	0.05186	0.25693
0.16255	0.10452	0.17560	0.02917	0.13825
0.79114	0.50356	0.55850	0.18081	0.70091
0.43958	0.47637	0.25096	0.04900	0.53094
0.28085	0.66818	0.35671	0.05549	0.27205
0.28132	0.33360	0.21903	0.02260	0.25618
1.00000	1.00000	1.00000	1.00000	1.00000
0.16128	0.26053	0.26279	0.01791	0.16744
0.01809	0.04041	0.03006	0.00240	0.00000
0.12103	0.13831	0.14567	0.00138	0.10369
0.32141	0.43474	0.24584	0.00386	0.34003
0.06586	0.11708	0.08449	0.00531	0.22196
0.14218	0.21982	0.21481	0.00349	0.17534
0.14727	0.29759	0.17386	0.02458	0.16870
0.06644	0.14086	0.08199	0.00867	0.16534
0.00000	0.00000	0.00000	0.00000	0.05649
0.00386	0.04338	0.04502	0.00116	0.08806
0.09474	0.21852	0.17225	0.01169	0.08507

];
而用corrcoef(X')得到的结果是：
ans =
  Columns 1 through 12
1.0000 0.6540 0.6320 0.2785 0.6869 0.8296 0.9680 0.7155 0.5349 0.8620 0.6286 0.5272
0.6540 1.0000 0.2310 0.1991 0.9187 0.6943 0.6956 0.9769 0.1427 0.5360 0.7431 0.4135
0.6320 0.2310 1.0000 0.8695 0.4927 0.8095 0.7324 0.2293 -0.1817 0.9229 0.7321 0.8376
0.2785 0.1991 0.8695 1.0000 0.5102 0.7030 0.4730 0.1609 -0.6001 0.7055 0.7183 0.7609
0.6869 0.9187 0.4927 0.5102 1.0000 0.8871 0.8054 0.9282 -0.0070 0.6946 0.8145 0.5072
0.8296 0.6943 0.8095 0.7030 0.8871 1.0000 0.9423 0.7348 0.0495 0.9180 0.8202 0.6629
0.9680 0.6956 0.7324 0.4730 0.8054 0.9423 1.0000 0.7562 0.3547 0.9179 0.7261 0.5909
0.7155 0.9769 0.2293 0.1609 0.9282 0.7348 0.7562 1.0000 0.2777 0.5397 0.6562 0.3032
0.5349 0.1427 -0.1817 -0.6001 -0.0070 0.0495 0.3547 0.2777 1.0000 0.0671 -0.2783 -0.3473
0.8620 0.5360 0.9229 0.7055 0.6946 0.9180 0.9179 0.5397 0.0671 1.0000 0.8409 0.8388
0.6286 0.7431 0.7321 0.7183 0.8145 0.8202 0.7261 0.6562 -0.2783 0.8409 1.0000 0.9039
0.5272 0.4135 0.8376 0.7609 0.5072 0.6629 0.5909 0.3032 -0.3473 0.8388 0.9039 1.0000
0.8181 0.9136 0.6028 0.4986 0.9409 0.8949 0.8808 0.8917 0.0744 0.8301 0.9114 0.6962
0.2780 0.5082 0.5787 0.6652 0.5244 0.4967 0.3641 0.3458 -0.5580 0.6024 0.8955 0.9087
0.4984 0.3156 0.8728 0.7899 0.4386 0.6408 0.5645 0.2127 -0.3629 0.8356 0.8579 0.9932
0.7649 0.4534 0.9667 0.8270 0.6872 0.9312 0.8681 0.4670 -0.0731 0.9751 0.8149 0.8152
0.8275 0.9371 0.3933 0.2675 0.9430 0.8417 0.8719 0.9790 0.3194 0.6784 0.6996 0.3889
0.8582 0.7599 0.7980 0.6433 0.8534 0.9388 0.9231 0.7406 0.0361 0.9527 0.9334 0.8239
   NaN    NaN    NaN    NaN    NaN    NaN    NaN    NaN    NaN    NaN    NaN    NaN
0.5655 0.9413 0.4169 0.4792 0.9389 0.7577 0.6662 0.8784 -0.1687 0.6270 0.8935 0.6210
0.6120 0.9448 -0.0057 -0.1156 0.7486 0.4820 0.5759 0.9235 0.3557 0.3610 0.5548 0.2376
0.6138 0.8558 0.5773 0.5801 0.8628 0.7737 0.6969 0.7657 -0.2160 0.7500 0.9763 0.8096
0.8625 0.7390 0.8190 0.6772 0.8745 0.9770 0.9462 0.7439 0.0459 0.9562 0.9001 0.7739
0.3188 0.2299 0.8076 0.9454 0.5854 0.7637 0.5333 0.2550 -0.4627 0.6615 0.6048 0.5611
0.5858 0.8727 0.5735 0.6425 0.9452 0.8401 0.7155 0.8166 -0.2506 0.7249 0.9408 0.7100
0.8303 0.9068 0.5495 0.4536 0.9748 0.9251 0.9090 0.9369 0.1772 0.7803 0.7988 0.5246
0.5682 0.5083 0.7968 0.8507 0.8043 0.9237 0.7551 0.5531 -0.2278 0.7803 0.7184 0.5726
-0.0841 -0.2901 0.6213 0.8129 0.1009 0.3611 0.1161 -0.2546 -0.5685 0.3155 0.1848 0.2911
0.1123 0.2717 0.5712 0.8477 0.6011 0.6410 0.3574 0.2913 -0.5738 0.4331 0.5083 0.3693
0.6541 0.9967 0.2676 0.2544 0.9461 0.7322 0.7138 0.9811 0.1110 0.5561 0.7547 0.4181
  Columns 13 through 24
0.8181 0.2780 0.4984 0.7649 0.8275 0.8582    NaN 0.5655 0.6120 0.6138 0.8625 0.3188
0.9136 0.5082 0.3156 0.4534 0.9371 0.7599    NaN 0.9413 0.9448 0.8558 0.7390 0.2299
0.6028 0.5787 0.8728 0.9667 0.3933 0.7980    NaN 0.4169 -0.0057 0.5773 0.8190 0.8076
0.4986 0.6652 0.7899 0.8270 0.2675 0.6433    NaN 0.4792 -0.1156 0.5801 0.6772 0.9454
0.9409 0.5244 0.4386 0.6872 0.9430 0.8534    NaN 0.9389 0.7486 0.8628 0.8745 0.5854
0.8949 0.4967 0.6408 0.9312 0.8417 0.9388    NaN 0.7577 0.4820 0.7737 0.9770 0.7637
0.8808 0.3641 0.5645 0.8681 0.8719 0.9231    NaN 0.6662 0.5759 0.6969 0.9462 0.5333
0.8917 0.3458 0.2127 0.4670 0.9790 0.7406    NaN 0.8784 0.9235 0.7657 0.7439 0.2550
0.0744 -0.5580 -0.3629 -0.0731 0.3194 0.0361    NaN -0.1687 0.3557 -0.2160 0.0459 -0.4627
0.8301 0.6024 0.8356 0.9751 0.6784 0.9527    NaN 0.6270 0.3610 0.7500 0.9562 0.6615
0.9114 0.8955 0.8579 0.8149 0.6996 0.9334    NaN 0.8935 0.5548 0.9763 0.9001 0.6048
0.6962 0.9087 0.9932 0.8152 0.3889 0.8239    NaN 0.6210 0.2376 0.8096 0.7739 0.5611
1.0000 0.6581 0.6302 0.7694 0.9289 0.9584    NaN 0.9344 0.7835 0.9400 0.9446 0.4887
0.6581 1.0000 0.8712 0.5818 0.3485 0.6933    NaN 0.7315 0.3465 0.8641 0.6230 0.4415
0.6302 0.8712 1.0000 0.8257 0.3144 0.7864    NaN 0.5374 0.1304 0.7415 0.7430 0.5904
0.7694 0.5818 0.8257 1.0000 0.6141 0.9085    NaN 0.5907 0.2232 0.7013 0.9340 0.8083
0.9289 0.3485 0.3144 0.6141 1.0000 0.8283    NaN 0.8528 0.8567 0.7718 0.8424 0.3667
0.9584 0.6933 0.7864 0.9085 0.8283 1.0000    NaN 0.8293 0.5971 0.9010 0.9906 0.6028
   NaN    NaN    NaN    NaN    NaN    NaN    NaN    NaN    NaN    NaN    NaN    NaN
0.9344 0.7315 0.5374 0.5907 0.8528 0.8293    NaN 1.0000 0.7984 0.9602 0.8071 0.4545
0.7835 0.3465 0.1304 0.2232 0.8567 0.5971    NaN 0.7984 1.0000 0.7059 0.5546 -0.0942
0.9400 0.8641 0.7415 0.7013 0.7718 0.9010    NaN 0.9602 0.7059 1.0000 0.8599 0.4824
0.9446 0.6230 0.7430 0.9340 0.8424 0.9906    NaN 0.8071 0.5546 0.8599 1.0000 0.6758
0.4887 0.4415 0.5904 0.8083 0.3667 0.6028    NaN 0.4545 -0.0942 0.4824 0.6758 1.0000
0.9391 0.7708 0.6445 0.7192 0.8239 0.8826    NaN 0.9795 0.6775 0.9663 0.8738 0.6170
0.9646 0.4636 0.4620 0.7437 0.9799 0.9039    NaN 0.8863 0.7691 0.8359 0.9228 0.5310
0.7183 0.4466 0.5722 0.8770 0.6564 0.7783    NaN 0.6515 0.2194 0.6427 0.8467 0.9412
-0.0170 0.1551 0.3674 0.5121 -0.1378 0.1576    NaN -0.0367 -0.5836 0.0160 0.2432 0.8608
0.4126 0.3749 0.3802 0.6033 0.3438 0.4474    NaN 0.4869 -0.0494 0.4360 0.5276 0.9413
0.9221 0.5058 0.3238 0.4898 0.9480 0.7741    NaN 0.9509 0.9183 0.8595 0.7628 0.2996
  Columns 25 through 30
0.5858 0.8303 0.5682 -0.0841 0.1123 0.6541
0.8727 0.9068 0.5083 -0.2901 0.2717 0.9967
0.5735 0.5495 0.7968 0.6213 0.5712 0.2676
0.6425 0.4536 0.8507 0.8129 0.8477 0.2544
0.9452 0.9748 0.8043 0.1009 0.6011 0.9461
0.8401 0.9251 0.9237 0.3611 0.6410 0.7322
0.7155 0.9090 0.7551 0.1161 0.3574 0.7138
0.8166 0.9369 0.5531 -0.2546 0.2913 0.9811
-0.2506 0.1772 -0.2278 -0.5685 -0.5738 0.1110
0.7249 0.7803 0.7803 0.3155 0.4331 0.5561
0.9408 0.7988 0.7184 0.1848 0.5083 0.7547
0.7100 0.5246 0.5726 0.2911 0.3693 0.4181
0.9391 0.9646 0.7183 -0.0170 0.4126 0.9221
0.7708 0.4636 0.4466 0.1551 0.3749 0.5058
0.6445 0.4620 0.5722 0.3674 0.3802 0.3238
0.7192 0.7437 0.8770 0.5121 0.6033 0.4898
0.8239 0.9799 0.6564 -0.1378 0.3438 0.9480
0.8826 0.9039 0.7783 0.1576 0.4474 0.7741
   NaN    NaN    NaN    NaN    NaN    NaN
0.9795 0.8863 0.6515 -0.0367 0.4869 0.9509
0.6775 0.7691 0.2194 -0.5836 -0.0494 0.9183
0.9663 0.8359 0.6427 0.0160 0.4360 0.8595
0.8738 0.9228 0.8467 0.2432 0.5276 0.7628
0.6170 0.5310 0.9412 0.8608 0.9413 0.2996
1.0000 0.8935 0.7747 0.1532 0.6163 0.8942
0.8935 1.0000 0.7800 0.0363 0.4849 0.9275
0.7747 0.7800 1.0000 0.6535 0.8804 0.5696
0.1532 0.0363 0.6535 1.0000 0.8110 -0.2177
0.6163 0.4849 0.8804 0.8110 1.0000 0.3453
0.8942 0.9275 0.5696 -0.2177 0.3453 1.0000

这是什么原因呢？如果是因为原矩阵中有0的关系；我另一组数据中也有0，但求出的数据却没有NaN。
请能人帮忙分析一下，不甚感激！！！

作者: ssxy60 时间: 2011-5-7 23:59
没人回答吗？

作者: ssxy60 时间: 2011-5-8 00:02
没人回答吗？

作者: 水木年华zzu 时间: 2011-5-8 10:21
回复 ssxy60 的帖子

有两行相乘等于0的情况（倒数第3行和倒数第10行），这样会导致分母为0 当然会出现NA了

作者: ssxy60 时间: 2011-5-8 15:09
回复水木年华zzu 的帖子

那要怎么解决呢?

作者: 水木年华zzu 时间: 2011-5-9 10:11
回复 ssxy60 的帖子

是数据的问题，分析下数据为什么会是这样子

作者: alair004 时间: 2012-2-6 16:58
特意来佩服一下···1154701217377341

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