How to plot with YYYYMM date format on x-axis?
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Frits
el 23 de Mzo. de 2011
Respondida: Tiago Dias
el 11 de Dic. de 2017
LS,
I would like to plot some data with dates on the horizontal axis. The dates are in YYYYMM format.
When I plot the data set, there is a small horizontal space between e.g. 200911 and 200912. However, there is a large horizontal space between e.g. 200912 and 201001. It is clear why this happens...
Does someone probably have a solution for this issue? Should i convert the YYYYMM format to a date format which matlab understands? How? Or does an option for equidistantial horizontal spacing in graphs exists?
Your help would be very much appreciated.
Best regards,
Frits
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Respuesta aceptada
Jiro Doke
el 23 de Mzo. de 2011
This would convert your dates in YYYYMM format to serial dates which would have the correct intervals between the dates.
x = [200911 200912 201001 201002];
serialDates = datenum(num2str(x(:)), 'yyyymm')
Confirm with this:
datestr(serialDates)
1 comentario
the cyclist
el 23 de Mzo. de 2011
If you use this approach, then you can use the "datetick" command (which effectively converts datenum-type numeric dates to calendar dates) to create the labels.
Más respuestas (2)
the cyclist
el 23 de Mzo. de 2011
Yes, you'll need to convert those integers, which are not regular, into something that just count the months. Something like
year = floor(yyyymm/100);
month = yyyymm - 100*year;
Then count the months from some reference year/month.
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the cyclist
el 23 de Mzo. de 2011
You could do something like this:
yyyymmVector
set(gca,'XTick',yyyymmVector)
set(gca,'XTickLabel',num2str(yyyymmVector))
But see also Jiro's solution.
the cyclist
el 23 de Mzo. de 2011
In the above comment, "yyyymmVector" was meant to represent your vector of integer dates.
Tiago Dias
el 11 de Dic. de 2017
Hello, i have a question, i got a table, the 1st column i have my time series, DD-MM-YYYY HH:MM:SS and on the others I got my variables.
I want to plot the time vs the variables
time = data(:,1); variables = data(:,2:end);
when i make plot(time,variables) i get an error
how can i fix it besides changing the data to 1 to 300
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