Thread Subject: Axes ticks irregular spacing

Hi all,

I wonder if it is possible to create X axis ticks with non-monotonically increasing values. Example: if the x-axis represents time and we want to locate one tick for the first day of every month, the spacing will be 28 and 31 between 01 Feb, 01 Mar and 01 Apr, respectively.

Thanks!!
Belen

On 29 Jun, 13:53, "dage Tarari" <ahs...@hjg.es> wrote:
> Hi all,
>
> I wonder if it is possible to create X axis ticks with non-monotonically increasing values.

Of course it is. Try:

set(gca,'xtick',(0:0.2:1).^2)

Rune

"dage Tarari" <ahsghd@hjg.es> wrote in message <h2a9ut$dmc$1@fred.mathworks.com>...
> Hi all,
>
> I wonder if it is possible to create X axis ticks with non-monotonically increasing values. Example: if the x-axis represents time and we want to locate one tick for the first day of every month, the spacing will be 28 and 31 between 01 Feb, 01 Mar and 01 Apr, respectively.
>
> Thanks!!
> Belen

one of the solutions is outlined below

     plot(1:10);
     set(gca,...
          'xtick',[1,2,pi,2*pi,9],...
          'xticklabel',{'1','2','pi','2pi','9Hz'});

us

Thank you so much Rune,
Belen

Rune Allnor <allnor@tele.ntnu.no> wrote in message <4c72e071-b1c2-49f6-8a7b-cea8dff43651@y7g2000yqa.googlegroups.com>...
> On 29 Jun, 13:53, "dage Tarari" <ahs...@hjg.es> wrote:
> > Hi all,
> >
> > I wonder if it is possible to create X axis ticks with non-monotonically increasing values.
>
> Of course it is. Try:
>
> set(gca,'xtick',(0:0.2:1).^2)
>
> Rune

Excuse me Rune but I still haven't found the way to do the following:
set(gca,'xtick',[0 31 59 90 120 151 181 212 243 273 304 334 365])
0, 31, 28, etc. are julian days.
I'll be very grateful for any advice,
Belen









Rune Allnor <allnor@tele.ntnu.no> wrote in message <4c72e071-b1c2-49f6-8a7b-cea8dff43651@y7g2000yqa.googlegroups.com>...
> On 29 Jun, 13:53, "dage Tarari" <ahs...@hjg.es> wrote:
> > Hi all,
> >
> > I wonder if it is possible to create X axis ticks with non-monotonically increasing values.
>
> Of course it is. Try:
>
> set(gca,'xtick',(0:0.2:1).^2)
>
> Rune

"Belen " <ahsghd@hjg.es> wrote in message <h2ab6a$frb$1@fred.mathworks.com>...
> Excuse me Rune but I still haven't found the way to do the following:
> set(gca,'xtick',[0 31 59 90 120 151 181 212 243 273 304 334 365])
> 0, 31, 28, etc. are julian days.
> I'll be very grateful for any advice,
> Belen

what's wrong with this perfect syntax?
naturally, you have to PLOT/LINE/etc first - or - set the axis's xlim...
otherwise, it does not show up...

     plot(1:370);
     set(gca,'xtick',[0 31 59 90 120 151 181 212 243 273 304 334 365]);

us

"dage Tarari" <ahsghd@hjg.es> wrote in message
news:h2a9ut$dmc$1@fred.mathworks.com...
> Hi all,
>
> I wonder if it is possible to create X axis ticks with non-monotonically
> increasing values. Example: if the x-axis represents time and we want to
> locate one tick for the first day of every month, the spacing will be 28
> and 31 between 01 Feb, 01 Mar and 01 Apr, respectively.

Others have suggested setting the XTick and/or XTickLabel properties, but
from your description I think you may prefer using the DATETICK function in
addition.

x = datenum(2009, 1:12, 1);
y = (1:length(x)).^2;
plot(x, y);
set(gca, 'XTick', x)
datetick('x', 6)

% alternately, if you want all the first days labeled, replace the last line
above with:
datetick('x', 6, 'keepticks')

--
Steve Lord
slord@mathworks.com

Thank you very much US!!
Belen


"us " <us@neurol.unizh.ch> wrote in message <h2abqv$9v$1@fred.mathworks.com>...
> "Belen " <ahsghd@hjg.es> wrote in message <h2ab6a$frb$1@fred.mathworks.com>...
> > Excuse me Rune but I still haven't found the way to do the following:
> > set(gca,'xtick',[0 31 59 90 120 151 181 212 243 273 304 334 365])
> > 0, 31, 28, etc. are julian days.
> > I'll be very grateful for any advice,
> > Belen
>
> what's wrong with this perfect syntax?
> naturally, you have to PLOT/LINE/etc first - or - set the axis's xlim...
> otherwise, it does not show up...
>
> plot(1:370);
> set(gca,'xtick',[0 31 59 90 120 151 181 212 243 273 304 334 365]);
>
> us

Thank you very much Steven. We are all used to program here in my office, but my none of us knew how to do this simple irregular spacing.
Best whishes,
Belen


"Steven Lord" <slord@mathworks.com> wrote in message <h2aeku$pld$1@fred.mathworks.com>...
>
> "dage Tarari" <ahsghd@hjg.es> wrote in message
> news:h2a9ut$dmc$1@fred.mathworks.com...
> > Hi all,
> >
> > I wonder if it is possible to create X axis ticks with non-monotonically
> > increasing values. Example: if the x-axis represents time and we want to
> > locate one tick for the first day of every month, the spacing will be 28
> > and 31 between 01 Feb, 01 Mar and 01 Apr, respectively.
>
> Others have suggested setting the XTick and/or XTickLabel properties, but
> from your description I think you may prefer using the DATETICK function in
> addition.
>
> x = datenum(2009, 1:12, 1);
> y = (1:length(x)).^2;
> plot(x, y);
> set(gca, 'XTick', x)
> datetick('x', 6)
>
> % alternately, if you want all the first days labeled, replace the last line
> above with:
> datetick('x', 6, 'keepticks')
>
> --
> Steve Lord
> slord@mathworks.com
>