error using num2str

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yue li
yue li 2018-9-6
评论： Alamgir M S M 2019-6-11
Hello, I try to use gscatters to draw the pca plot.
>> a=randn(10)
a =
0.1380 1.1569 -0.1609 0.3105 0.5558 0.4394 -0.8964 -1.0145 0.8531 -0.4698
-0.7107 0.0530 0.4093 -0.2495 -1.1203 -0.0896 -1.2033 -0.2133 0.4043 0.8864
0.7770 -1.2884 -0.9526 0.5037 -1.5327 1.0212 1.0378 -0.3253 -0.7006 -1.3852
0.6224 -0.3712 0.3173 -0.8927 -1.0979 -0.8740 -0.8459 1.9444 -1.6305 -1.9568
0.6474 -0.7578 0.0780 1.9085 -1.4158 0.4147 -0.1729 -0.5718 1.4600 0.4207
-0.4256 -0.5640 1.3244 0.1222 0.0596 0.3484 -1.2087 -0.2500 2.0500 0.4007
1.0486 0.5551 -0.2132 1.0470 -0.4113 0.3493 -0.2971 -1.5693 0.1205 0.0951
0.6607 -0.5568 -0.1345 -0.2269 -0.3680 -0.7292 -3.2320 -0.4774 -0.9899 0.4967
2.5088 -0.8951 -1.1714 -0.1625 -1.3610 0.3268 -1.0870 -1.3380 1.1978 1.0822
1.0635 -0.4093 -1.3853 0.6901 0.7796 -0.5149 -1.4264 0.0303 -0.5927 0.9704
>> [~, scores,pcvars]=pca(a)
scores =
0.7231 -0.4236 -0.8435 1.6875 -0.6992 0.2655 -0.0274 -0.0061 -0.3268
0.1185 -0.8979 -1.0235 -0.6050 -0.0047 -0.8379 -0.6529 0.6096 -0.0189
-0.9948 2.9174 0.1385 0.0806 0.1037 -0.2427 -0.5801 -0.5163 -0.0227
-3.8238 0.2561 -0.6242 -0.3132 -0.2561 0.4312 0.4093 0.3275 0.0336
1.5496 1.1953 -0.4926 -0.6628 0.9139 -0.1605 0.7067 0.1346 -0.2196
1.2263 -0.9438 -2.0018 -0.6615 0.0639 0.6865 -0.1349 -0.4513 0.2163
0.9502 0.5985 0.2710 1.1530 -0.2914 -0.5412 0.4474 0.1301 0.3926
-0.9756 -2.1818 1.0927 -0.3772 -0.0722 -0.6675 0.2564 -0.6411 -0.0881
1.4738 0.4494 1.9580 -1.1421 -0.9287 0.4928 -0.0722 0.2144 -0.0180
-0.2473 -0.9696 1.5253 0.8409 1.1708 0.5739 -0.3524 0.1987 0.0517
pcvars =
2.6823
2.0158
1.5384
0.8532
0.4142
0.3139
0.2049
0.1645
0.0410
>> x=zscore(scores(:,1));
>> y=zscore(scores(:,2));
>> z=zscore(scores(:,3));
>> gscatter3(x,y,z,tmp1,{'b','g','m'},{'.','.','.'},15)
Error using num2str (line 45)
Input to num2str must be numeric.
Error in gscatter3 (line 103)
g=cellstr(num2str(g'))';
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Walter Roberson
Walter Roberson 2018-9-6
There appear to be two gscatter3() in the file exchange: which of the two are you using? Are you using https://www.mathworks.com/matlabcentral/fileexchange/37970-gscatter3 by Salai Selvam V labeled version 1.0.0.0, or are you using https://www.mathworks.com/matlabcentral/fileexchange/61502-gscatter3 by Gustavo Ferraz Trindade labeled version 1.1.0.0, or are you using something else?
yue li
yue li 2018-9-6
编辑：yue li 2018-9-6
Hello, Walter Roberson,
Thank you for your response.
I was use the first one. But still the same mistake.
Thank you again!

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采纳的回答

Walter Roberson
Walter Roberson 2018-9-6
For that version of gscatter3:
gscatter3(x,y,z,cellstr(tmp1),{'b','g','m'},{'.','.','.'},15)
You cannot pass that routine a cell array of string variables, but you can pass it a cell row vector of character vectors.
  2 个评论
yue li
yue li 2018-9-7
Hello, Walter Roberson,
Thank you so much for your great help!
Actually, I spent the whole day.
Thank you again!
Yue Li
Alamgir M S M
Alamgir M S M 2019-6-11
Hi,
I did exactly the same in my code. But, it says:
"If clr is a cell array of strings, the length of clr must be equal to the length of x, y and z."
I don't know what to do. Any help please?
Sorry for asking simple question :(

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