Does 'colheaders' require a minimum array size?

Question

Natasha 2012-6-6

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/40501-does-colheaders-require-a-minimum-array-size

I have a peice of code that graphs data, and I use the values stored in 'colheaders' from importing to lable the graphs. In copying the code I discovered that if I have fewer than 1255 data points - the 'colheaders' attribute completely disappears i.e. if I have >1255 data points my file imports a structure with:

data < double >, textdata < cell >

But if I have >1255 data points my file returns a structure with:

data < double >, textdata < cell >, colheaders < cell >

I identified the 1255 min by trial and error i.e. literally just changing the size of the array I was importing, I've also tried adding the '\t' or tab delimiter identifier in my 'importdata' with no luck.

Any ideas on how to create the variable colheaders without having a minimum number of data points? Or more likely, any ideas on what I'm doing wrong as it seems crazy to have a data min restraint here.

Thanks in advance!

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Answer 1

per isakson 2012-6-6

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https://ww2.mathworks.cn/matlabcentral/answers/40501-does-colheaders-require-a-minimum-array-size#answer_50170

在 MATLAB Online 中打开

R2012a. I'm lucky with the example from the on-line help. I copy&paste

    Day1  Day2  Day3  Day4  Day5  Day6  Day7
01 76.21 61.54 40.57  5.79 20.28  1.53
11 45.65 79.19 93.55 35.29 19.87 74.68
68  1.85 92.18 91.69 81.32 60.38 44.51
60 82.14 73.82 41.03  0.99 27.22 93.18
13 44.47 17.63 89.36 13.89 19.88 46.60

to the file: ascii_with_colhead.txt

    >> A =  importdata( 'ascii_with_colhead.txt')
    A = 
              data: [5x7 double]
          textdata: {'Day1'  'Day2'  'Day3'  'Day4'  'Day5'  'Day6'  'Day7'}
        colheaders: {'Day1'  'Day2'  'Day3'  'Day4'  'Day5'  'Day6'  'Day7'}