MATLAB Answers

How to validate expected numeric tall array column?

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SL
SL on 24 Oct 2016
Answered: Adam Filion on 23 Apr 2018
I have 60 column tall array where I cannot declare expected numeric columns numeric. I exported those numeric columns from Google Spreadsheet, but MATLAB think there is something string, but I cannot confirm it. Code
ds.SelectedFormats{strcmp(ds.SelectedVariableNames, 'Age')} = '%d';
Output
Error using tall
Mismatch between file and format character vector.
Trouble reading 'Numeric' field from file (row number 4, field number 2) ==> -,male,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,0,,0,,,,,"lorem, ipsun",0,1,1,0,0,0,0,0,0,0,,,,,,,,,\n
Error in test_tall_array (line 26)
tt = tall(ds);
Caused by:
Reading the variable name 'Age' using format '%d' from file: '/home/masi/test.csv' starting at offset 0.
MATLAB: 2016b OS: Debian 8.5

  1 Comment

Kirby Fears
Kirby Fears on 24 Oct 2016
SL,
The error suggests row 4, field 2 of your data contains an invalid data type. Can you manually view row 4 of your data to confirm this? Is it possible that some data is misaligned within the "Age" column?

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Answers (1)

Adam Filion
Adam Filion on 23 Apr 2018
It looks like the data provider uses '-' to denote missing data in some places. The datastore's 'TreatAsMissing' property can solve this.
ds = datastore('*','TreatAsMissing','-');

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