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Reference Guides
Reference guides are available for functions and commands supported by OML, Tcl, and Python.
Reference Guide for OpenMatrix Language Functions
The Reference Guide contains documentation for all functions supported in the OpenMatrix language.
Plotting Commands
ishandle
Returns true if x is a graphics handle; returns false if otherwise.

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Reference Guides
Reference guides are available for functions and commands supported by OML, Tcl, and Python.
- Scripting Guide for OpenMatrix Language
  OpenMatrix is a mathematical scripting language.
- Reference Guide for OpenMatrix Language Functions
  The Reference Guide contains documentation for all functions supported in the OpenMatrix language.
  - ABF Commands
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  - Logical Commands
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  - Optimization Commands
  - Plotting Commands
    - addaxis
      Plots the given dataset on a new vertical axis in an existing 2D plot.
    - area
      Creates stacked areas in an axes and returns handles of the areas.
    - autumn
      Create autumn colormap.
    - axes
      Create a new axes or set current axes by passing a handle argument.
    - axis
      Sets the scaling and range of x, y, and z axes (x by default). Called without arguments, axis turns autoscaling on.
    - bar
      Creates bars in an axis and returns handles of the bars.
    - bar3
      Creates 3d bars on an axis and returns the handles of the bars.
    - bone
      Create bone colormap.
    - box
      Turn on/off the border of a 2D plot.
    - boxplot
      Creates a box plot. Returns the statistics of the input data and the handles of the graphics object.
    - bubblechart
      Creates a bubble chart and returns the handle of the scatter graphics object.
    - caxis
      Sets/gets the colorbar range.
    - cividis
      Create cividis colormap.
    - cla
      Clears the current axes or axes specified by handle.
    - clf
      Clears the current figure or figure specified by handle.
    - close
      Close the current, or a specific, or all figure window.
    - colorbar
      Turns the axes colorbar on/off. Get and set the colorbar's minimum and maximum values.
    - colormap
      Gets or sets the colormap of a figure or axes.
    - contour
      Creates a 2D contoured surface in an axes.
    - contour3
      Creates 3D contoured surface in an axes.
    - cool
      Create cool colormap.
    - copper
      Create copper colormap.
    - copystyle
      Creates a copy of the style properties of a plot object.
    - cubehelix
      Create cubehelix colormap.
    - datetick
      Sets date formatted ticks on axis.
    - delete
      Deletes the file(s), f, or a graphic object, h.
    - dock
      Docks a floating figure in the main window.
    - drawnow
      Forces an update of the current axes.
    - ellipse
      Creates an elliptical shape on the figure.
    - fanplot
      Creates a surface and a set of 3D lines defined by the x, y, and z matrices.
    - figure
      Creates a new figure for plotting and uicontrols.
    - fill
      Creates 2D filled in polygons of range x and y and color c.
    - findall
      Finds all objects that have a property named propertyName and the value for such property is propertyValue. findall performs the same search as findobj but includes objects for which 'handlevisibility' property is set to 'off' and their children.
    - findobj
      Finds all objects which have a property named propertyName and the value for such property is propertyValue.
    - flag
      Create flag colormap.
    - gca
      Returns a handle to the current axes object.
    - gcf
      Returns a handle to the current figure.
    - get
      Returns the value of the named property p from the graphics handle, h. If property name is omitted, all properties of h will be returned.
    - getappdata
      Gets the application data of an object.
    - getframe
      Captures an image of a figure.
    - getmousepos
      Returns the mouse position in the figure area.
    - ginput
      Records the mouse position(s)/keyboard input(s) in the current figure.
    - gray
      Create gray colormap.
    - grid
      Turn on/off grid lines in a plot. Toggle the states if no argument is used.
    - guidata
      Gets or sets user defined data in the GUI.
    - hist
      Creates a histogram in an axis.
    - hist3
      Creates a 3d histogram in an axis.
    - hold
      Turn on/off the "hold" state of axes. When the "hold" state is on, new plotting data will be added to the axes.
    - hot
      Create hot colormap.
    - hsv
      Create hsv colormap.
    - imagesc
      Display a matrix as an image with scaled colors.
    - imshow
      Displays an image file in a figure.
    - inferno
      Create inferno colormap.
    - isaxes
      Returns true if x is an axis handle; returns false if otherwise.
    - isfigure
      Returns true if x is a figure graphics handle; returns false if otherwise.
    - ishandle
      Returns true if x is a graphics handle; returns false if otherwise.
    - ishold
      Returns true if the next plot will be added to the current one; returns false if otherwise.
    - jet
      Create jet colormap.
    - legend
      Update axes' legend text, turn on/off the legend of axes. Toggle the states if no argument is used.
    - line
      Add a curve in current axes or a specified axes.
    - lines
      Create lines colormap.
    - linkaxes
      Links and synchronizes the range of axes between plots.
    - loglog
      Plots a given dataset in 2D axes with logarithmic scales for x and y axes.
    - magma
      Create magma colormap.
    - mesh
      Creates mesh in an axes and returns handles of the mesh.
    - meshgrid
      Construct a grid of points from coordinate vectors.
    - movegui
      Moves a figure to the specified position.
    - movie
      Captures an image of a figure.
    - ocean
      Create ocean colormap.
    - openfig
      Restore a figure from a .fig file.
    - pareto
      Creates a pareto plot and returns the handle of the graphics objects.
    - pastestyle
      Sets the style properties to a plot object.
    - patch
      Creates 2D or 3D patches in an axis.
    - pcolor
      Display a matrix as a heat map. The values of input matrix z are mapped to the colors of the colormap.
    - pink
      Create pink colormap.
    - plasma
      Create plasma colormap.
    - plot
      Plots a given dataset in 2D axes.
    - plot3
      Creates 3D lines in an axis and returns handles of the lines.
    - plotyy
      Plots given datasets in independent y-axes and a common x-axis.
    - polar
      Creates a line plot in polar coordinates.
    - prism
      Create prism colormap.
    - Graphics Object Properties
      Properties for the graphics object in OML.
    - quiver
      Creates a 2D quiver plot in an axis.
    - rainbow
      Create rainbow colormap.
    - rectangle
      Creates a rectangular shape on a figure.
    - saveas
      Save a figure to a specific file.
    - savefig
      Save a figure to a .fig file.
    - scatter
      Creates dots in an axes and returns handles of the dots.
    - scatter3
      Creates 3D dots in an axes and returns handles of the dots.
    - semilogx
      Plots a given dataset in 2D axes with logarithmic scales for the x axis.
    - semilogy
      Plots a given dataset in 2D axes with logarithmic scales for the y axis.
    - set
      Sets property values for graphics handles.
    - setappdata
      Stores user specified application data in an object.
    - sphere
      Creates and plots a 3D unit sphere.
    - spring
      Create spring colormap.
    - stem
      Creates a stem plot in an axis and returns the stem handles.
    - stem3
      Creates a 3D stem plot in an axis and returns the stem handle.
    - subplot
      Sets up a plot grid with rows by cols subwindows and sets the current axes for plotting to the location given by index.
    - summer
      Create summer colormap.
    - surf
      Creates surfaces in an axes and returns handles of the surfaces.
    - text
      Creates a textbox at coordinate x,y with text 't'.
    - title
      Sets the title of the plot.
    - twilight
      Create twilight colormap.
    - trimesh
      Creates a 3D triangulated mesh.
    - triplot
      Creates a 2D triangulated mesh.
    - trisurf
      Creates a 3D triangulated surface.
    - uibuttongroup
      Creates a button group in a figure to group radio buttons.
    - uicontextmenu
      Creates a context menu that is displayed with a right-click for a figure, uitab, or select uicontrol objects.
    - uicontextmenuitem
      Creates a menu item in a context menu that is displayed with a right-click for a figure, uitab, or select uicontrol objects.
    - uicontrol
      Creates interactive graphical control objects in a figure. Use the 'style' property of uicontrol to create different types of control objects.
    - uimenu
      Creates a menu bar for a figure.
    - uimenuitem
      Creates a menu item, in a menu bar, for a figure.
    - uipanel
      Creates a frame for interactive graphical control objects in a figure.
    - uipushtool
      Creates a tool button in a uitoolbar.
    - uiresume
      Resumes execution of code, stopping uiwait on the given handle, handle, or stopping all uiwait commands in the current session.
    - uisearchbox
      Creates a search box in a container object.
    - uispinbox
      Creates a spin box in a figure.
    - uitab
      Creates a tab in a tabbed frame for interactive graphical control objects in a figure.
    - uitabgroup
      Creates a tabbed frame for interactive graphical control objects in a figure.
    - uitable
      Creates a table in a container object.
    - uitoggletool
      Creates a toggle tool button in a uitoolbar.
    - uitoolbar
      Creates a toolbar with uipushtool or uitoggletool objects in a container object such as a figure, uipanel or uitab.
    - uitree
      Creates a hierarchy in the graphical user interface.
    - uitreenode
      Creates a node in a uitree hierarchy.
    - uiwait
      Pauses the execution of code until the given handle, handle, is deleted, and the timeout, waittime, is reached.
    - undock
      Undocks a figure, making it float over the main window.
    - view
      Sets the viewpoint for the current axes.
    - viridis
      Create viridis colormap.
    - waitbar
      Creates a waitbar in the current session.
    - waitforbuttonpress
      Pauses the GUI until a mouse button/key is pressed in the current window.
    - waterfall
      Creates waterfall meshes in an axes and returns handles of the meshes.
    - white
      Create white colormap.
    - winter
      Create winter colormap.
    - xlabel
      Annotates the x-axis.
    - xlim
      Set and query range of x axis.
    - xline
      Add one or more vertical lines in the current axes or specified axes.
    - ylabel
      Annotates the y-axis.
    - ylim
      Set and query range of y axis.
    - yline
      Add one or more horizontal lines in the current axes or specified axes.
    - zlabel
      Annotates the z-axis.
    - zlim
      Set and query range of z axis.
  - PSIM Commands
  - Polynomial Math Commands
  - Signal Processing Commands
  - Special Functions Commands
  - Statistical Analysis Commands
  - String Operations Commands
  - System Commands
  - Table Commands
  - Tcl Bridge OML Commands
  - Tcl Bridge Tcl Commands
  - Time Commands
  - Trigonometry Commands
  - OML to Python Bridge Commands
  - Python to OML Bridge Commands
- Python in Compose Reference Guide
Appendix
Get help for the optional libraries that are available in the Extension Manager.
Frequently Asked Questions
You've got questions? We've got answers!

ishandle

Returns true if x is a graphics handle; returns false if otherwise.

Syntax

ishandle(h)

Inputs

h: Type: double | integer; Dimension: scalar

Outputs

R: Numerical equivalent true/false.

Example

Simple ishandle example.

ishandle(pi)

ans = 0