Set specific date ticks

47 vues (au cours des 30 derniers jours)
EM
EM le 13 Oct 2017
Hi trying to set specific date ticks. I don't understand why the following code does not work
figure()
hold on
box on
plot(date1,series1,'k')
plot(date1,series2,'r--')
xlabel('Date')
ylabel('Price')
DateString = {'06/30/2010';'11/30/2010'};
datenum(DateString);
set(gca, 'XTick', datenum(DateString))
dateFormat = 1;
datetick('x', dateFormat)

Réponse acceptée

Walter Roberson
Walter Roberson le 13 Oct 2017
datetick('x', dateFormat, 'keepticks')
  5 commentaires
EM
EM le 21 Oct 2017
Hi I'm still receiving an error. Can you help?
Here is the code:
figure()
hold on
box on
plot(date1,series1,'k')
plot(date1,series2,'r--')
xlabel('Date')
ylabel('Price')
DateString = {'06/30/2010';'11/30/2010'};
datenum(DateString);
set(gca, 'XTick', datenum(DateString))
dateFormat = 1;
datetick('x', dateFormat,'keepticks')
Here is the error:
Error using matlab.graphics.axis.decorator.DatetimeRuler/validateTicks Value must be a vector of increasing datetime values.
Error in matlab.graphics.axis.decorator.DatetimeRuler/setTicksDelegate
Walter Roberson
Walter Roberson le 21 Oct 2017
Your date1 appears to be datetime objects, and you appear to be using R2016b or later. In that case you do not use datetick.
figure()
hold on
box on
plot(date1, series1, 'k')
plot(date1, series2, 'r--')
xlabel('Date')
ylabel('Price')
DateString = {'06/30/2010';'11/30/2010'};
ticlocs = datetime(DateString); %R2014b or later
ticlocs.Format = 'dd-MMM-yyyy';
set(gca, 'XTick', ticklocs); %R2016b or later

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Plus de réponses (2)

Peter Perkins
Peter Perkins le 13 Oct 2017
Modifié(e) : Walter Roberson le 13 Oct 2017
If you have access to R2016b or later, you will probably be much happier using datetime rather than datenum/datestr, including for plotting:
d = datetime(2015,1,1:500);
x1 = randn(size(d));
plot(d,x1)
ax = gca;
ax.XAxis.TickValues = datetime(2015,1,1)+calquarters(0:6);
ax.XAxis.TickLabelFormat = 'QQQ-yyyy';
  3 commentaires
Walter Roberson
Walter Roberson le 13 Oct 2017
Yup. For example,
ax.XAxis.TickValues = datetime(2015,1,1)+days([18 143 207 258]);
ax.XAxis.TickLabelFormat = 'MMM dd';
or
ax.XAxis.TickValues = datetime(2015,[1;5;11;14], [17;5;30;19]);
ax.XAxis.TickLabelFormat = 'yy/M/d';
EM
EM le 13 Oct 2017
Thank you Walter, that is very helpful.

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Med Aymane Ahajjam
Med Aymane Ahajjam le 14 Mai 2019
In order for the TickLabelFormat to work, at least in my case, I had to specify:
ax.XTickLabelMode = 'manual';
ax.XAxis.TickLabelFormat = 'HH:mm:ss';

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