Clear Filters
Clear Filters

changing the axis of a plot in a way that the data series starts at x=0 at a point at one point on the y-axis and ends on the right end of the plot

3 views (last 30 days)
hi,
I have this code:
dates=datenum(VIXdate)
y=VIX
plot(dates,y)
%datevc divides the date in different columns, first colum is the year,
%second the month and thrid the day
d=datevec(dates)
%Takes just the year (first column)
d=d(:,1)
%takes every year just once
[a,idx]=unique(d(:,1),'first')
ylabel('VIX');
set(gca,'xtick',dates(idx),'xticklabel',a)
set(gca,'Box','off')
this works fine, but the problem I faces is that the time series (y=VIX) does not start at the left end of the plot but instead there is a space between the y-axis and the first point of the time series. I know that when there are normal values on the x-axis, I can change it, but I am not able to do it with dates, what do I need to do?

Accepted Answer

Jonathan Epperl
Jonathan Epperl on 2 May 2013
This is still not a working example, the variable VIXdate is obviously unknown to us...
So the dirty way again:
ytix = get(gca,'YTick');
set(gca,'YTick',ytix(2:end));
  3 Comments
Jonathan Epperl
Jonathan Epperl on 2 May 2013
You should make that a new question, and finally make it so that we can copy and paste your code into our matlab and run it and see what it is you want to achieve.

Sign in to comment.

More Answers (2)

Mel
Mel on 1 May 2013
You could also set just the x axis to be the same as your data:
xlim([0 max(dates)])

Jonathan Epperl
Jonathan Epperl on 29 Apr 2013
  3 Comments
Jonathan Epperl
Jonathan Epperl on 1 May 2013
Sure. Without knowing what your actual data looks like (it would still be nice if you could post a working minimal example), you could do that:
ylims = get(gca,'YLim');
axis tight
set(gca,'YLim',ylims);
Dirty, but should work.
Locks
Locks on 1 May 2013
Edited: Locks on 1 May 2013
dates=datenum(VIXdate)
y=VIX
plot(dates,y)
d=datevec(dates)
%Takes just the year (first column)
d=d(:,1)
%takes every year just once
[a,idx]=unique(d(:,1),'first')
ylabel('VIX');
set(gca,'xtick',dates(idx),'xticklabel',a)
ylims = get(gca,'YLim');
axis tight
set(gca,'YLim',ylims);
set(gca,'Box','off')
it's working perfectly now, thanks!
in addition, it would be great if the number 0 on the y axis is not shown in the plot due to the fact that it's so near to the numbers on the x axis, is there a way to do that?

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!