Naming individual fields in a struct

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Hi everyone,
I have this block of code:
HWFiles = {'midas_wind_197901-197912.txt',............'midas_wind_201301-201312.txt'};
for k=1:numel(HWFiles);
fid = fopen(HWFiles{k}, 'r');
tmp = textscan(fid,'%s %*s %*f %*f %*s %*f %f %*f %f %f %f %f %f %*f %*f %*f %*f %*f %*f %*f %*f %*s %*f', 'Delimiter',',');
HWData(k).data = tmp ;
Not pasting well sorry. HWData becomes a 1 x 35 struct and I wanted to change each field name to the year from the file, eg 1979, 1980 .... 2013. Any ideas with this?

Accepted Answer

Walter Roberson
Walter Roberson on 24 Feb 2014
Are you asking to create a structure of length 1, HWData, with field names 1979, 1980, and so on? If so then you cannot do that as field names must start with a letter. If you wanted to be able to look up by year then you could use a common prefix such as 'Y', so Y1979, Y1980, and so on. Or you could use
TO use the prefix,
prefix = 'Y';
and in the loop,
filename = HWFiles{k};
underpos = find(filename, '_', 1, 'last');
fieldname = [prefix filename(underpos+1:underpos+3)];
HWData.(fieldname) = tmp;
Walter Roberson
Walter Roberson on 24 Feb 2014
Edited: Walter Roberson on 24 Feb 2014
Opps, should have had
underpos = find(filename == '_', 1, 'last');
Indexing by a non-consecutive number (eg. year) to work in a loop is going to be very nearly as much trouble.
Recall that you can use fieldnames() to get the names of the fields. And sort() of a cell array of strings would give the fieldnames sorted numerically provided they were all the same length.

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More Answers (1)

Image Analyst
Image Analyst on 24 Feb 2014
If you have R2013b, why not use a table. You can use struct2table to convert your structure to a possibly more convenient table. Table is a brand new data type.
  1 Comment
mashtine on 24 Feb 2014
I wish I could but I am stuck with R2010 unfortunately.

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