Plotting dates on the x-axis
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I have a cell with 4 columns in which the first one is a day, the second is a month, the third is a year and the fourth is an index value. I would like to know if there's a way of plotting a "timelapse" on the x-axis using the info in the first three columns and the index values on the y-axis, or do I have to modify my cell using datenum? If so, any tips on doing that? Thanks in advance, any help is very valuable!!
回答（1 个）
Just use datenum
a = rand(5,4,3);
datenum(a(:,1),a(:,2),a(:,3))
Use sort if needed
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2021-4-4
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