- Text files, only these parameter names apply: FileType, ReadVariableNames, ReadRowNames, TreatAsEmpty, DatetimeType, Delimiter, HeaderLines, Format, EmptyValue, MultipleDelimsAsOne, CollectOutput, CommentStyle, ExpChars, EndOfLine, DateLocale, and Encoding.
- Spreadsheet files, only these parameter names apply: FileType, ReadVariableNames, ReadRowNames, TreatAsEmpty, DatetimeType, Sheet, Range, Basic, and TextType.
- Text or Spreadsheet files with the opts import options, only these parameter names apply: ReadVariableNames, ReadRowNames, DateLocale, Encoding, Sheet, and Basic. "
Why doesn't 'HeaderLines' work in the readtable command?
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I am importing some excel files into Matlab using the readtable command. There are a couple of header lines in the file that I would like to skip, but when I use the name-value pair ('HeaderLines',2), I get an error:
Error using readtable (line 198)
Invalid parameter name: HeaderLines.
Has anyone else experienced this? Is there a way to get around this error?
0 commentaires
Réponse acceptée
Walter Roberson
le 31 Mar 2018
"When reading:
You are reading a spreadsheet file. You need to use Range instead of HeaderLines
1 commentaire
Jeremy Hughes
le 7 Juil 2022
For more recent releases, NumHeaderLines is allowed in spreadsheet files.
Plus de réponses (1)
Bradley Stiritz
le 21 Oct 2018
Modifié(e) : Bradley Stiritz
le 25 Avr 2019
Walter's solution is a good one, when the number of table rows are known in advance. In my case, I have Excel files with a fixed number of header rows, and variable number of data rows.
I reached out to tech support, and got the following solution. This works well for me, I hope it can help others also--
% Assume Excel file has 6 header rows
>>path_ = 'C:\data\my_file.xlsx';
>>ImportOptions_ = detectImportOptions(path_, 'NumHeaderLines', 6);
>>tb = readtable(path_,ImportOptions_);
(Edit: corrected minor bugs per Doug Bergman)
2 commentaires
Doug Bergman
le 25 Avr 2019
Modifié(e) : Doug Bergman
le 25 Avr 2019
Brad, your solution worked well for me, once i realized that
path
is the full filename and not just the directory path, and
IOpts
is the same as
ImportOptions_
Thanks for posting, saved me a day of pulling my hair out.
Bradley Stiritz
le 25 Avr 2019
Hi Doug, thank you for your comment and correction notes. I'm glad you were able to save some time. Apologies for the sloppy code example, I have edited my post accordingly.
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