How do I change datetime format in stackedplot on X-Axis?

Right now by default it's in 'hh:mm' I want it to be in 'hh:mm:ss' format with 1 minute interval.

Note: The image shown below is a "stackedplot" and not "plot".

Answer 1

[Adam Danz]

In case anyone is still looking for this solution,

% Create stacked plot, set xdata as datetime values 
% The XData can also be set using 'XVariable' for tables but needs to be datetime format.
sph = stackedplot(rand(50,5),'XData',datetime(2020,1,1)+minutes(linspace(0,480,50)));

% Get axis handles
ax = findobj(sph.NodeChildren, 'Type','Axes'); 

% Set datetime format.  The first axis will be the bottom one. 
xtickformat(ax(1),'HH:mm:ss')

Answer 2

[dpb]

hAx=gca;
hAx.TickLabelFormat='hh:mm:ss';

You can set the XTick values as wanted but there will not possibly be room to label more than half-hour frequency if that when you add the other text--just not enough real estate to have that much text in such close proximity.

[Vraj Mistry]

Hi dpb,

Thanks for your answer but it still gives me an error shown below:

Unrecognized property 'TickLabelFormat' for class 'matlab.graphics.chart.StackedLineChart'.

I think this would work fine if it was normal plot but as I mentioned it's a "stackedplot".

[dpb]

My R2018b got trashed by a windows update and haven't gotten restored so was presuming there'd be duration or timeruler axis underneath.

From the online doc, looks like they've (again) hidden properties -- you can try the FileExchange https://www.mathworks.com/matlabcentral/fileexchange/32934-getundoc-get-undocumented-object-properties routine from Yair and see if you can go "handle diving" to find properties of interest to let you do what you're looking for. Bound to be there somewhere; it's just uncovering how they're buried and whether the object is or is not totally opaque to the user by TMW's design/implementation.

[Vraj Mistry]

Hi dpb,

I tried the above function by creating a stackedplot variable 'sp' and it gave me the results shown below. I don't think any of the available properties can be used for the solution. Thanks Again.

getundoc(sp)

ans = 

  struct with fields:

                           ApplicationData: [1×1 struct]
                                      Axes: [1×1 Axes]
                    AxesPropertiesListener: [1×1 event.listener]
                          AxesVisibleCache: 1
                              BeingDeleted: 'off'
                      ChartDecorationInset: [0.0749 0.0432 1.1102e-16 4.4409e-16]
                                  Copyable: 1
                                DataCursor: [1×1 matlab.graphics.chart.internal.stackedplot.StackedLineDataCursor]
                   DefaultPropMap_Internal: [0×0 struct]
                               Description: 'StackedLineChart'
                           DescriptionMode: 'manual'
                       DisplayLabelsHandle: [1×1 Text]
                         DisplayLabelsMode: 'manual'
                      DisplayVariablesMode: 'auto'
                     DisplayVariables_I_EC: {'Var1'}
                             ErrorCallback: ''
                         ErrorCallbackMode: 'auto'
                            GapBetweenAxes: 0.1000
                      HandleVisibilityMode: 'auto'
                                   HitTest: 'on'
                        InnerVariableIndex: 0
                                 InputType: 'table'
                                  Internal: 0
                              LegendHandle: [1×1 Legend]
                    LinePropertiesListener: [1×1 event.listener]
                                LooseInset: [0.1300 0.1100 0.0950 0.0750]
                       MarkedCleanListener: [1×1 event.listener]
                    MaxInsetForSubplotCell: [0 0 0 0]
                                MaxNumAxes: 25
                               MaxVarIndex: 1
                             MessageHandle: [1×1 TextBox]
                             MinAxesHeight: 20
                              NodeChildren: [2×1 Graphics]
                                NodeParent: [1×1 ScribeLayer]
                            NumPlotsInAxes: 5
                  OuterPositionPixelsCache: [1 1 1.2653e+03 712.6667]
                            PanInteraction: [1×1 matlab.graphics.interaction.uiaxes.Pan]
                                ParentMode: 'manual'
                                     Plots: {[1×5 Line]}
                                  Selected: 'off'
                           SelectionHandle: [0×0 SelectionHandles]
                              Serializable: 'on'
               SerializableApplicationData: [1×1 struct]
                          SerializableMode: 'auto'
                              SkipReupdate: 0
                  SubplotCellOuterPosition: [0 0 0 0]
                                       Tag: []
                                TightInset: [0.0749 0.0432 1.1102e-16 4.4409e-16]
                      TransformForPrintFcn: ''
        TransformForPrintFcnImplicitInvoke: 'on'
    TransformForPrintFcnImplicitInvokeMode: 'auto'
                  TransformForPrintFcnMode: 'auto'
                                      Type: 'stackedplot'
                                UnitsCache: 'normalized'
                             VariableIndex: 1
                               VisibleMode: 'auto'
                                XData_I_EC: [1×0 double]
                              XLabelHandle: [1×1 Text]
                                XLabelMode: 'auto'
                               XLimitsMode: 'auto'
                            XVariable_I_EC: []
                                YData_I_EC: []
                           ZoomInteraction: [1×1 matlab.graphics.interaction.uiaxes.ScrollZoom]
                           AutoListeners__: {[1×1 event.listener]}
                                  Behavior: [1×1 struct]

[dpb]

getundoc(sp)
ans = 
  struct with fields:
                           ApplicationData: [1×1 struct]
                                      Axes: [1×1 Axes]
                                MaxNumAxes: 25
                               MaxVarIndex: 1
                             MessageHandle: [1×1 TextBox]
                             MinAxesHeight: 20
                              NodeChildren: [2×1 Graphics]
                                NodeParent: [1×1 ScribeLayer]
                            NumPlotsInAxes: 5
                            ...
                                     Plots: {[1×5 Line]}
                                  Selected: 'off'
                                         ...
    
                                  Behavior: [1×1 struct]

Well, there's an Axes handle to start probing... don't give up so quickly!!

[dpb]

Also, try setting the display format for the x-axis variable before plotting -- possibly the function will look at that in deciding the display format.