Index exceeds matrix dimensions. (loading datas)

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Lee Ariana
Lee Ariana 2011 年 11 月 3 日
Hello guys, Currently, i try to load multiple of data into MATLAB. The input.csv consists of 100 rows and 9 column integer value (positive and negative). I keep get this error for line one = strncmpi {C{10} , 'one' , 3}; Really appreciate if you guys can help me since i'm a beginner to MATLAB.
fid = fopen ('D:\MATLAB\R2010b\Japanese\input.csv');
C = textscan(fid,'%f%f%f%f%f%f%f%f%f','delimiter' , ',');
input = [C{1} C{2} C{3} C{4} C{5} C{6} C{7} C{8} C{9}];
one = strncmpi {C{10} , 'one' , 3};
two = strncmpi {C{10} , 'two' , 3};
three = strncmpi {C{10} , 'three' , 5};
four = strncmpi {C{10} , 'four' , 4};
five = strncmpi {C{10} , 'five' , 4};
six = strncmpi {C{10} , 'six' , 3};
seven = strncmpi {C{10} , 'seven' , 5};
eight = strncmpi {C{10} , 'eight' , 5};
nine = strncmpi {C{10} , 'nine' , 4};
ten = strncmpi {C{10} , 'ten' , 3};
target = double ([one two three four five six seven eight nine ten]);
input = input';
target = target';
Thank You Ariana

回答 (3 件)

Bengt-Arne 2011 年 11 月 3 日
There is only 9 "%f%f%f%f%f%f%f%f%f" in C = textscan(fid,'%f%f%f%f%f%f%f%f%f','delimiter' , ','); fclose(fid);
Add one more %f=).
  2 件のコメント
Walter Roberson
Walter Roberson 2011 年 11 月 3 日
Notice the use of () rather than {}


Fangjun Jiang
Fangjun Jiang 2011 年 11 月 3 日
You have 9 columns of data so I assume the resulting C is a 1x9 cell array. You don't have C{10}. That is what the error message is about.
  1 件のコメント
Lee Ariana
Lee Ariana 2011 年 11 月 3 日
Thanks Fangjun Jiang to identify the problem.


Ora Zyto
Ora Zyto 2011 年 11 月 3 日
If your data import worked correctly, your cell C should be a 1x9 cell array, with each cell being a 100x1 double array.
Therefore, C{10} is not defined, since this would be cell #10 of C.
Also, strncmpi is a string comparison function. What are you trying to achieve with this functionality?
Finally, if you're working with comma-separated file, you may want to use CSVREAD instead: this will get you a matrix of numbers directly, without having to deal with the cell array.
  2 件のコメント
Ora Zyto
Ora Zyto 2011 年 11 月 4 日
I don't understand where you are having issues. Your current workflow through:
input = [C{1} C{2} C{3} C{4} C{5} C{6} C{7} C{8} C{9}];
should generate a 100 x 9 matrix.
I was suggesting replacing all those lines (from fopen) by:
input = csvread('D:\MATLAB\R2010b\Japanese\input.csv');
If you are having other difficulties with your data, please explain exactly what the issue is.


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