plotyy xaxis not aligned with 'keeptick' and datenum

good afternoon matlabers! so i have been trying to plot 2 datasets with different y-axis using plotyy and to have the date displayed on the x-axis. when i plot the data using the below code, the x-axis is not aligned.

but if i remove the datetick and just use time = linspace(1,12,12); everything works fine.

any suggestions?

y1 = rand(12,1);
y2 = rand(12,1);

startDate = datenum('01-01-2010');
endDate = datenum('12-31-2010');
time = linspace(startDate,endDate,12);
% time = linspace(1,12,12);

figure

hold on 
set(gca,'XTick',time, 'XMinorTick', 'on','XGrid','on')
datetick('x','yyyy/mmm','keepticks')

plotyy (time,y1,time,y2)

Answer 1

[Thomas]

Clear the XTickLabel before using datetick.. remove hold.. That should solve the problem..

y1 = rand(12,1);
y2 = rand(12,1);

startDate = datenum('01-01-2010');
endDate = datenum('12-31-2010');
time = linspace(startDate,endDate,12);
% time = linspace(1,12,12);

figure

% hold on 
set(gca,'XTick',time, 'XMinorTick', 'on','XGrid','on')

[AX,H1,H2]=plotyy (time,y1,time,y2)
set(AX,'XTickLabel',[])
datetick('x','yyyy/mmm','keepticks')

EDIT This takes care of the ticks coming out wrong..

y1 = rand(12,1);
y2 = rand(12,1);

startDate = datenum('01-01-2010');
endDate = datenum('12-31-2010');
time = linspace(startDate,endDate,12);
% time = linspace(1,12,12);

figure

%hold on 

[AX,H1,H2]=plotyy (time,y1,time,y2)
set(AX,'Xtick',[],'XTickLabel',[],'Xlim',[min(time) max(time)])

set(gca,'Xtick',time,'XGrid','on')

datetick('x','mmm','keepticks')

[nori]

Hi Thomas,

Thanks for the solution but it seems that the data values are now shifted so they are not in line with the xaxis.

I reran my original code with hold commented out and it seems as though the 1st dataset will plot on the xaxis but the 2nd is offset (and not using the date as values).

I checked the help and it only shows how to get the handles for the yaxis :(

[nori]

edit: I just looked a bit closer and the solution seems to change the month order

[Thomas]

The Xticks were plotting in the middle of the months giving unaligned ticks with the date tick which was always the 1st of the month..