Function 'subsindex' is not defined for values of class 'datetime'.

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alpedhuez
alpedhuez 2018-6-12
评论： Walter Roberson 2018-6-13
I have a simplest possible csv file but still cannot plot(test.X,test.Y) with the above message. Please advise.
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Walter Roberson
Walter Roberson 2018-6-12
If you do wish to use the dates as the X axis, then which MATLAB release are you using?

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回答（2 个）

Walter Roberson
Walter Roberson 2018-6-12
With sufficiently new MATLAB:
T = readtable('test.csv');
plot(T.X, T.Y)
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Matt Dickson
Matt Dickson 2018-6-13
It's not because people may confuse it with 1609, as you said, but because the plot as you showed would simply show the year as "9", not "09". Hence, if you want the date with a normal year format with the year at the bottom and not part of each tick mark, you do need to add 2000 to each year.
Walter Roberson
Walter Roberson 2018-6-13
Ah, I had never noticed the XRuler.SecondaryLabel for datetime plots before. And the appropriate code all appears to be built-in, so I can't poke through it :(

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OCDER
OCDER 2018-6-12
FID = fopen('test.csv');
Data = textscan(FID, '%D%f', 'Delimiter', ',', 'Headerlines', 1);
fclose(FID);
Data{1}.Year = Data{1}.Year + 2000; %Assuming you want 2009, etc.
plot(Data{1}, Data{2})

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