draw more date in the axis

I would like to report more dates: for example every month or every week

I use plot to draw it..(

plot(Ax_Sys,XDates(locs(:,i)),sig,'DisplayName',STR_name{i},'Color',SumCTR_color(i,:),'LineWidth',1);)

Answer 1

[Walter Roberson]

load matlab_Xdates
load matlab_TeStrum
load matlab_fig
Ax_Eq.Parent

ans = 
  0x0 empty GraphicsPlaceholder array.

Somehow, you have an axes that has no Parent, so gca is creating a new axes, and that new axes defaults to numeric.

You should also be specific about the axes to parent graphics operations to.

  legend_lines(1)=plot(Ax_Eq,XDates,TE_strum(:,1));
   xtickformat(Ax_Eq, 'MMM u' );%  DA SISTEMARE
   xticks(Ax_Eq, XDates(1):calmonths(1):XDates(end));%  DA SISTEMARE

[shamal]

thank you..because i don't see in the format to specify axis

[Walter Roberson]

The last line,

___ = xticks(ax,___)

is indicating that you can pass an axes as the first parameter.

[shamal]

okk thank

Answer 2

[Walter Roberson]

Use xticks

If you must report every week, then you will probably want to use xtickangle

[shamal]

hi,

K>> XDates(1):calmonths(1):XDates(end)

ans = 

  1×25 datetime array

Columns 1 through 6

   01/01/2023   01/02/2023   01/03/2023   01/04/2023   01/05/2023   01/06/2023

Columns 7 through 12

   01/07/2023   01/08/2023   01/09/2023   01/10/2023   01/11/2023   01/12/2023

Columns 13 through 18

   01/01/2024   01/02/2024   01/03/2024   01/04/2024   01/05/2024   01/06/2024

Columns 19 through 24

   01/07/2024   01/08/2024   01/09/2024   01/10/2024   01/11/2024   01/12/2024

Column 25

   01/01/2025

%%****************MY CODE************************   
 legend_lines(i)=plot(Ax_Eq,XDates,TE_strum(:,i)','DisplayName',STR_name{i},'Color',col(i,:),'LineWidth',width_arr(i));
 text(Ax_Eq,r-2,TE_strum(end,i),strcat({' '},num2str(i)),'Color',col(i,:),'Interpreter','none');
 xticks(XDates(1):calmonths(1):XDates(end));   

Error using xticks (line 33)
Tick values must be a vector of increasing numeric values.

[Walter Roberson]

Are you still using R2023a ? You have the habit of not filling in the Product and Release fields when creating Questions, but those are important information.

What shows up for

legendLines(i).Parent.XAxis

?

[shamal]

i use '24.1.0.2603908 (R2024a) Update 3'

[Cris LaPierre]

Maybe alos share XDates.Format

[Walter Roberson]

What shows up for

which -all xticks

[shamal]

K>> XDates.Format

ans =

'dd/MM/yyyy'

[shamal]

K>> which -all xticks

C:\Program Files\MATLAB\R2024a\toolbox\matlab\graph3d\xticks.m

[Cris LaPierre]

I can't duplicate your error, and I show an example that works with the expected data.

Please share all the data used to create your figure. Consider saving your variables to a mat file and attaching it to your post using the paperclip icon. Since you are specifiying a target axis, it would be insightful to see all relevant code.

[shamal]

Ok i try to send it

  legend_lines(1)=plot(Ax_Eq,XDates,TE_strum(:,1));

   xtickformat( 'MMM u' );%  DA SISTEMARE
   xticks(XDates(1):calmonths(1):XDates(end));%  DA SISTEMARE

Error using xtickformat (line 34)
Invalid numeric tick label format.

Error in untitled2 (line 7)
   xtickformat( 'MMM u' );