I have a daily observation of price for 32 years. The first column is date and the second column is price.
I want to plot all the data( every days in month) but since the data period is too long, I want to write the years in the x-axis like a picture I attached.Data is attached.

 采纳的回答

Try this —
T1 = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1120695/sample.csv', 'VariableNamingRule','preserve')
T1 = 1749×2 table
Date Adj Close __________ _________ 01/02/1990 24.87 02/02/1990 24.32 05/02/1990 24.54 06/02/1990 24.69 07/02/1990 24.29 08/02/1990 23.77 09/02/1990 23.69 12/02/1990 24.38 13/02/1990 23.76 14/02/1990 22.05 15/02/1990 19.71 16/02/1990 20.78 20/02/1990 22.78 21/02/1990 23.89 22/02/1990 22.54 23/02/1990 23.69
figure
plot(T1.Date, T1.('Adj Close'))
xtickformat('MMM dd yyyy')
set(gca,'XTickLabelRotation',90)
.

4 个评论

Many thanks,
I repeat the code with the whole data , but because the main data is too long, it only shows every 5 years in the x-axis (pi is attatched). I want to have all years in the x-axis. the data is attached as well.
Try this —
T1 = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1121370/vvv.csv')
T1 = 8125×2 table
Date Open __________ _____ 03/01/1990 18.19 04/01/1990 19.22 05/01/1990 20.11 08/01/1990 20.26 09/01/1990 22.2 10/01/1990 22.44 11/01/1990 20.05 12/01/1990 24.64 15/01/1990 26.34 16/01/1990 24.18 17/01/1990 24.16 18/01/1990 24.34 19/01/1990 22.5 22/01/1990 26.7 23/01/1990 24.72 24/01/1990 25.39
xty = unique(year(T1.Date));
xt = datetime(['Jan 01 ' num2str(xty(1))], 'InputFormat','MMM dd yyyy') + calyears(0:numel(xty))';
xt(1) = T1.Date(1);
figure
plot(T1.Date, T1.('Open'))
set(gca,'XTick',xt)
xtickformat('MMM dd yyyy')
set(gca,'XTickLabelRotation',90)
The ‘Jan 01 1990’ will not plot because it does not exist, so I replaced it with the first date that does exist. I cannot over-ride this with the 'XTickLabel' property with datetime arrays.
.
This is perfect! Many many thanks!!!
As always, my pleasure!

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