Row index exceeds matrix dimensions

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Peter Larsen 2019-4-24

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/458186-row-index-exceeds-matrix-dimensions

评论： Peter Larsen 2019-4-24

采纳的回答： Andrei Bobrov

I have a 143x4 matrix, which looks like this

A=[ 1 556037.025 6237642.046 5.964;

1 556037.035 6237642.041 5.960;

1 556037.028 623742.041 5.967;

2 556032.654 623730.067 10.368;

2 556032.652 623730.060 10. 364;

4 556042.000 623730.000 5.000;

4 556042.002 623730.005 5.010] ;

Column 1 is the point number, column 2-4 are X,Y,Z coordinates.

Each point is measured between 1 and 5 times.

My code is:

A=load('Test.txt');
A=sortrows(A);
T=array2table(A);
m=varfun(@mean,T,'GroupingVariables',1);
out=A;
out(:,2:end)=out(:,2:end) - m{A(:,1),3:end}

I get the error Row index exceeds table dimensions

I have tried to test different scenarios and the error occurs when a point is missing, for example if there is no point number 7, so the first column goes from 6 to 8.

Any idea what is wrong?

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Peter Larsen 2019-4-24

The complete code is updated now

Peter Larsen 2019-4-24

It works until the numbers in column 1 skips a number (See updated revision). If the point number skips from 2 to 4 without having a point number 3, the error occurs

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采纳的回答

Andrei Bobrov 2019-4-24

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/458186-row-index-exceeds-matrix-dimensions#answer_372006

T = array2table(A);
m = varfun(@mean,T,'GroupingVariables',1);
out = A;
[~,~,ii] = unique(A(:,1));
out(:,2:end) = out(:,2:end) - m{ii,3:end};

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Peter Larsen 2019-4-24

Thanks!

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MATLAB Language Fundamentals Matrices and Arrays

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