error using readtable : Array indices must be positive integers or logical values.

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Arthur 2022-8-4

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1774005-error-using-readtable-array-indices-must-be-positive-integers-or-logical-values

评论： Arthur 2022-8-5

simpleData.txt

在 MATLAB Online 中打开

Hi,

I have a simple tab-delimited file text which looks like :

Month H_Gh H_Dh H_Bn Ta

Jan 33 17 55 0.5

Feb 52 29 60 1.4

Mar 97 51 97 5.6

Apr 123 60 113 9.7

I want to create a table with readtable(filename) Matlab function. So I have tried this directly into console

T = readtable('data.txt', 'Delimiter', '\t')
Error using readtable (line 197)
Array indices must be positive integers or logical values.
Note: readtable detected the following parameters:
'HeaderLines', , 'ReadVariableNames', true, 'Format', ''

I have tried with others text files. If all rows in the file are the same types, readtable works well, but if a line contains string and numbers (like my file), this error pop. Anyone have an solution to propose ?

I'm on windows7 with R2018a.

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Stephen23 2022-8-4

在 MATLAB Online 中打开

simpleData.txt

It works on this forum using your sample file:

T = readtable('simpleData.txt', 'Delimiter', '\t')
T = 12×5 table
     Month     H_Gh    H_Dh    H_Bn     Ta 
    _______    ____    ____    ____    ____

    {'Jan'}     33      17      55      0.5
    {'Feb'}     52      29      60      1.4
    {'Mar'}     97      51      97      5.6
    {'Apr'}    123      60     113      9.7
    {'May'}    161      91     115     13.7
    {'Jun'}    178      79     160       18
    {'Jul'}    176      76     165     19.3
    {'Aug'}    153      67     148     18.7
    {'Sep'}    105      52     102     14.5
    {'Oct'}     63      42      51     10.2
    {'Nov'}     33      18      49      4.9
    {'Dec'}     24      16      32      1.2

Arthur 2022-8-5

Indeed, that works on this forum by running with matlab licence R2022a, but i'm developing with R2018a.When I run it on command window the error mentioned above pops.

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回答（1 个）

Mathias Smeets 2022-8-4

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1774005-error-using-readtable-array-indices-must-be-positive-integers-or-logical-values#answer_1021150

在 MATLAB Online 中打开

This seems to work:

opts = detectImportOptions('simpleData.txt');
tbl = readtable('simpleData.txt',opts);

I hope this is what you are asking :)

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Mathias Smeets 2022-8-5

Very strange, I looked it up online and it seems like some people, as you can see here, solved some similar problems by reinstalling. But my suggestion would be to wait a bit until other people answer.

Sorry I can not help you further.

Arthur 2022-8-5