lot chart with the respective date on the x axis starting with the first date for the first data point

dates=datenum(VIXdate)

y=VIX

plot(dates,y)
d=datevec(dates)
d=d(:,1)
[a,idx]=unique(d)

ylabel('VIX');

set(gca,'xtick',dates(idx),'xticklabel',a)

set(gca,'Box','off')

I have the following code, which shows me a graph with the historic values for a vector called VIX. On the x-axis, I have the years from the vector VIXdate displays, which is working perfectly. The only problem I am facing is, that the dates are displayed for the last day of each year, but I would like to see the date at the point where the first date (01.01) of each year is. How do I have to change the code?

[Azzi Abdelmalek]

Sven, it was answered in the previous question

   [a,idx]=unique(d(:,1),'first')

I've edited the answer.

[Azzi Abdelmalek]

If it's ok, I will delete this question

[Locks]

perfect, sorry haven't seen it, but now it's working