MATLAB: Adding year to plot using datetick

datetick

I have created a plot for a volatility measure, now i want to add the years of the measure to the x axis. I have the appropriate year in a .txt file which i have loaded into the variable 'dates'. However i can not get the labels onto my plot

plot(1:iNumObs,exp(vLogVolsBF),'r:')
xlabel('Trading days since 2000-01-03')
ylabel('Volatility')
title('Particle filter estimate of volatility');
datetick('dates','yyyy');

It returns the error:

??? Error using ==> datetick>parseinputs at 344 The axis must be 'x','y', or 'z'.

Error in ==> datetick at 109 [axh,nin,ax,dateform,keep_ticks,keep_limits] = parseinputs(varargin);

Thank you

Best Answer

Thank you for your answer, it is the second case that is relevant. My data consists of 3081 observations, having loaded the year for each observation into the variable 'dates' i thought i was trying to do exactly as you suggest using datetick('dates','yyyy'); after my plot ?

Related Solutions

MATLAB: Add dates in x-axis

Referring the doc: datetick is useful when plotting numeric values that are serial date numbers. Days is just an array of numbers and not actually serial date numbers. Instead, use datetime to create your dates info and then plot.

d1 = datetime('01/01/2020','InputFormat','dd/MM/uuuu');
d2 = datetime('30/03/2020','InputFormat','dd/MM/uuuu');
days = d1:1:d2; % Creates your x-axis, 90 dates from Jan 1st to March 30
figure(1)
plot(days,df,'b.-')
grid on, axis tight
datetick('x','dd/mmm'); %datetick('x','dd') will show 90 x-axis ticks, which may not look neat in the plot

MATLAB: Datetick with plotyy

datetick(AX(1),'x','yyyy')

If that still doesn't do what you want you can clear other axis Ticks

set(AX(2),'XTick',[])

Best Answer

Related Solutions

MATLAB: Add dates in x-axis

MATLAB: Datetick with plotyy

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