Using plot with dates stored in a cell array
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Hello Matlab experts,
I need your help plotting a price of some item on different days.
I have a cell array called dates with dates stored as strings (actually char) in the follwoing format: '1/22/20'
I also have an array of double with prices called prices. Lengths of these two arrays are of course identical. Now, I would like to plot the prices on different dates (as bars). If I use datetime, the date is converted to the year 0020. So,how to use plot function to plot dates on x axis and prices on y axis? Thank you very much.
>> class (dates{1})
ans =
char
>> datetime(dates{1})
ans =
22-Jan-0020
>> dates{1}
ans =
1/22/20
采纳的回答
I get a different result —
i = 1;
dates{i} = '1/22/20';
dtv = datetime(dates{i}, 'InputFormat','MM/dd/yy')
That appears to be correct.
This should lalso work in recent versions of MATLAB. See Date and Time from String Array for details.
.
更多回答（2 个）
Here's one way to add 2000 to the years
dates = {'1/22/20','1/23/20','1/24/20','1/25/20'};
new_dates = datetime(regexprep(dates,'\d+$','${sprintf(''%d'',str2double($0)+2000)}'))
Then you can use them in plot or bar or whatever.
prices = [100 101 98 94];
bar(new_dates,prices)
hold on
plot(new_dates,prices,'-ro','LineWidth',2)
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