about convert time data and plotting
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Hi. I have a question about converting time data
I have time data in double and Thickness data of water mass I calculated.
Attached TDD(TDD(:,1)=Thick, TDD(:,2)=time data )
So I draw plot using them.
I want to convert xlabelstick to months.ex) 01 02 03 04 --- 11 12
Thank you for your help.
采纳的回答
load("TDD.mat")
%TDD
subplot(121);
plot(datetime(TDD(:,2),'ConvertFrom','datenum'), TDD(:,1), '.');
datetick('x', "mm/dd"); % doc datetick for more options
subplot(122);
plot(datetime(TDD(:,2),'ConvertFrom','datenum', 'Format', 'MM/dd'), TDD(:,1), '.');
%datetick('x', "MM/dd"); % doc datetick for more options
7 个评论
주희 박
2022-7-22
Walter Roberson
2022-7-22
You should not use datetick() together with datetime() objects. Instead you should use 'Format' when you construct the datetime() object.
Chunru
2022-7-22
@Walter Roberson Updated. See the difference.
Walter Roberson
2022-7-22
The odd 04/01 has to do with the automatic range selection rounding to "nice" numbers, together with the fact that you asked for month and day number (not for month and year). So the 01/01 is month january (1) day 1 of 2000, and the 04/1 is month april (4) day 1 of 2000.
Chunru
2022-7-22
I would like to point out that with "datetick('x', "mm/dd")" we can explicitly choose the data format as month/day. With datetime(TDD(:,2),'ConvertFrom','datenum', 'Format', 'MM/dd'), the format is changed to "Jan" and so on. It seems that datetick('x', "mm/dd") should be the command to change the tick setting. The datetime format command seems failed to do so.
주희 박
2022-7-23
更多回答（1 个）
Walter Roberson
2022-7-22
load TDD
thick = TDD(:,1);
dt = datetime(TDD(:,2),'ConvertFrom', 'datenum', 'Format', 'MM');
scatter(dt, thick, '.')
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