best way to import this csv

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Tom 2012-12-14

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https://ww2.mathworks.cn/matlabcentral/answers/56577-best-way-to-import-this-csv

I can't work out how to import this csv file - https://dl.dropbox.com/u/11341635/Data.csv

Have tried various methods but I find a lot of the functions and terms are brand new to me so a lot of the forum posts and help files I'm reading are just over my head.

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Walter Roberson 2012-12-14

Which fields of it do you need?

You will not be able to use csvread() as that is only suitable for files that are completely numeric.

Tom 2012-12-14

All of it is important but only some of it represents actual results, i.e. some of them are more 'descriptors' (don't know proper language).

The IDs are for the 41 test subjects. HL & Spkrs1-Spkrs20 are descriptors. HL is linked to ID always, whereas Spkrs1-Spkrs20 are linked to the relevant values in for c1-c20 and AB1-AB20.

e.g. The first test on the first subject gives: - ID = 1 (that subject's ID number) HL = 1 (they're in class 1 not class 0) Spkrs1 = lrc2-lr (subject was subjected to lrc2 followed by lr) AB1 = 0 (they rated lrc2 above lr) c1 = 7 (on a 1-10 scale, they rated lrc2 to be at 7 compared to lr)

So ID, HL & Spkrs are all descriptors whereas AB & c are actual results from the experiment.

(It might be simpler for me to get rid of the AB column and just have the c values are going negative for when AB = 1)

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Answer 1

Walter Roberson 2012-12-15

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/56577-best-way-to-import-this-csv#answer_68592

在 MATLAB Online 中打开

fid = fopen('Data.csv', 'rt');
fmt = ['%f', '%f', repmat('%f', 1, 20), repmat('%f', 1, 20), repmat('%s', 1, 20)];
dat = textscan(fid, fmt, 'HeaderLines', 1, 'Delimiter', ',');
fclose(fid);
ID = dat{1};
Hl = dat{2};
C = cell2mat(dat(3:22));
AB = cell2mat(dat(23:42));
spkrs = [dat{43:62}];

Now ID, H1, C, and AB are numeric arrays, with the C(:,1) corresponding to C1, C(:,2) corresponding to C2, and so on. And spkrs is now a cell array of strings with spkrs{J,1} corresponding to row J of columns spkrs1, and so on.