inserting long xtick label

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TESFALEM ALDADA
TESFALEM ALDADA 2020-3-7
编辑： dpb 2020-3-8
Hi,
I wanted to insert long time series of xticklabel for my plot.
I tried manually using:
set(gca, 'xticklabels' ,{'1/1/1990', '1/2/1990', '3/1/1990', . . . since the date length is long (15 years) i could not type all time series. so what is the short cut to inser this xtick?
Thank you
  2 个评论
Star Strider
Star Strider 2020-3-7
See the documentation for plot timeseries.
The other option (if you did not use a datetime array) is to use the datetick function.
TESFALEM ALDADA
TESFALEM ALDADA 2020-3-8
编辑：dpb 2020-3-8
ok, i am working to plot using the left and right axis where this method is not woking for me.
furthermore it shows error message when i use a set(gca, ...) option to further process,
maybe see below please
yyaxis left
ts1 = timeseries(Qobs,1:4383);
ts1.Name = 'Daily Count';
ts1.TimeInfo.Units = 'days';
ts1.TimeInfo.StartDate = '01-Jan-2000'; % Set start date.
ts1.TimeInfo.Format = 'mmm dd, yy'; % Set format for display on x-axis.
ts1.Time = ts1.Time - ts1.Time(1); % Express time relative to the start date.
hL=plot(X,Qobs, 'g', X,Qsim);
ylabel('Flow (m^3/s)')
xlabel('Daily flow')
% legend('Observed','Simulated')
% hL.FaceColor = [1 0 0];
set(gca,'xtick',1:4383,'ylim', [0,12])
plot(ts1)
yyaxis right
hR=bar(X,P,5, 'k'); %
set(gca,'YColor', 'k','Ydir','reverse','ylim',[0,50],'xlim',[1,4383], 'xtick',1:500:4383)
ylabel('Rainfall (mm)')
xlim([1 4383])

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采纳的回答

dpb
dpb 2020-3-7
编辑：dpb 2020-3-8
Don't label manually at all; use a datetime variable for the x-axis variable in plot() and you'll get datetime ticklabels automagically.
ADDENDUM:
t=1:4383; t=t.';t=t-t(1); % number days vector
Qobs=randn(size(t)); % dummy data to match
ts1 = timeseries(Qobs,t); % create the ts object
ts1.TimeInfo.Units='days';
ts1.TimeInfo.StartDate='01-Jan-2000';
ts1.TimeInfo.Format='mmmyy'; % bug/implementation issue -- uses datenum() strings internally
plot(ts1)
hAx=gca;
xl=xlim; % retrieve xlimits
xl(2)=xl(2)+days(1); % make RH axis end at 1/1 next year
xlim(xl) % update xlim, now draws last tick label
produced
Finish up as desired.
Not knowing what X is, no way to know what to do about adding a bar plot at this point...
NB: The bug/implementation snafu on the TS date format string. Setting it to 'MMMyy' as is correct for datetime object produced warning/error when tried to plot as
>> plot(ts1)
Error using matlab.internal.datetime.cnv2icudf (line 157)
Unrecognized minute format. Format: MMMyy.
Error in timeseries/plot (line 142)
datetimeTickFormat = matlab.internal.datetime.cnv2icudf(char(h.TimeInfo.Format));
>>
Cap-M is minute field for datenum variables, NOT datetime class which is what the timeseries and new-fangled DatetimeRuler object is for the datetime aware plot functions. In fact, after the plot() line above,
>> hAx.XAxis
ans =
DatetimeRuler with properties:
Limits: [Jan 01, 2000 Jan 01, 2012]
TickValues: [Jan 01, 2000 Jan 01, 2002 Jan 01, 2004 Jan 01, 2006 Jan 01, 2008 Jan 01, 2010 Jan 01, 2012]
TickLabelFormat: 'MMMyy'
Show all properties
>>
shows it was converted.
  1 个评论
TESFALEM ALDADA
TESFALEM ALDADA 2020-3-8
i tried this way but it dont works for daily time frames. please can you give me some example, and also i have two axis plot; one using plot function and the other axis has bar plot.
how can i adjust for this.
best

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