More Matlab Graphics and GUI Graphics subplots some useful commands 3D graphics GUI GUI controls The callback property Other essential properties

Comments about the “Game of Life” Initial universe Time step

input universe embed output universe Count neighbors Make decisions

Count neighbors input universe Count the neighbors of a cell Matrix with the neighbors numbers

Subplots Subplot I Subplot II

h1 = subplot(7,7,[ ]);

h1 = subplot(7,7,[ ]); get(h1,'type') ans = axes

h2=axes

subplot(7,7,[7 14])

h1 = subplot(7,7,[ ]);

The interactively edited figure/axes/object is accessible through the gcf/gca /gco commands (get current figure/axes/object). >> get(gca) ALim = [0 1] ALimMode = auto AmbientLightColor = [1 1 1] Box = on CameraPosition = [ ] CameraPositionMode = auto CameraTarget = [ ] CameraTargetMode = auto CameraUpVector = [0 1 0] CameraUpVectorMode = auto CameraViewAngle = [ ] CameraViewAngleMode = auto : Useful Commands

plot(x,y)

hl=findobj(gcf,’type’,’line’)

set(h1,'color','r');

set(gcf,'tag','first‘); Figure; y = x.^-2; plot(x,y);

firstFigure = findobj('tag','first'); h2 = findobj(firstFigure,'type','line') set(h2,'marker','*');

firstFigure = findobj('tag','first'); h2 = findobj(firstFigure,'type','line') set(h2,'marker','*');

3D graphics x = [-2:0.2:2] x = [ … ] y = [-4:0.4:4] y = [ … ] We want to calculate and displayZ=x(x 2 -y 2 )

3D graphics surf(XX,YY,ZZ) size(XX) ans = XX(1:5,1:5) ans = ….. replica of x length(y) rows

surf(XX,YY,ZZ) size(XX) ans = XX(1:5,1:5) ans = …..

surf(XX,YY,ZZ) size(XX) ans = XX(1:5,1:5) ans = …..

3D graphics surf(XX,YY,ZZ) size(YY) ans = YY(1:5,1:5) ans = … … … … ….. replica of y Length(x) columns

3D graphics surf(XX,YY,ZZ) size(ZZ) ans = ZZ = XX.*(XX.^2-YY.^2); Element-by-element matrix operations

How do we create XX and YY? [XX YY] = meshgrid(x,y); Were [XX YY] = meshgrid(x) is the same as [XX YY] = meshgrid(x,x);

How does Matlab know how to relate some value with a specific color? Colormaps! A colormap is an m-rows by 3 column matrix Each row is a color specified in RGB values (between 0 and 1) C=get(1,'colormap') C =

colormap(cool) “colormap” is a property of the figure

colormap(colorcube)

The same plot as a contour map colormap(jet) contour(XX,YY,ZZ,100)

… and with a colorbar colorbar

Solid shading We can change the way the surface displays by changing its shading: >>shading flat faceted %default interp >>surf(peaks) %creates 49 by 49 matrix % an plots its values %against x,y indices flat faceted interpolated

Every axes has a property called ‘view’ that controls the azimuth (az) and elevation (el) of the viewpoint To change the viewpoint we use either: view(az,el) or set(axes_handle,’View’,[az el])

>>view(-37.5,30) >>view(-10.0,30) >>view(0,30)>>view(0,0)

Special 3d plots contour3(x,y,z,n) %create n realistic contours interpreting z %as the height from the x y plane. If specified % x and y should have the same size as z >>contour3(topo,30) >>axis off

Special 3d plots We can create a sphere or a cylinder (of radius =1) with little effort >>[x,y,z]=sphere; %will compute the required % N+1 (N=20 by default) coordinates so >>surf(x,y,z) %will plot sphere surface >>axis equal Note:  sphere without left arguments will plot the surface.  sphere(n) use n instead of the default of 20

Special 3d plots To create a cylinder we issue the following command: >>[x,y,z]=cylinder; >>surf(x,y,z)%this creates a basic cylinder of %radius 1

We can also create cylinder with reference to a specific profile. We will now generate a cylinder with the e sin(t) profile >> t = 0:pi/10:2*pi; >> [X,Y,Z] = cylinder(exp(sin(t))); >> surf(X,Y,Z) Special 3d plots

Graphical User Interfaces Why? Built in UIs Uicontrols GUI programming

Every day examples

GUI examples

Graphic Objects figure axes 2D-plot 3D-plot axis labels title GUI objects pushbutton toggle edit text menu

1.Enable you to share your work with other people (your advisor/lab mates or grandmother) 2.Easy way to perform repetitive task that need constant user input 3.Create interactive demos to your applications 4.It’s fun… Motivation or why GUIs?

GUI components Figure window GUI controllers which are divided into two major classes: uimenu (like the File,Edit etc) uicontrols (buttons, lists, radio buttons pop-up list like in any other application) uimenu and uicontrols are children of the figure If an uimenu is implemented as submenu, then it is a child of another uimenu

The UIcontrols are common interface controlers Help us perform specific actions or set the variables for future actions Actions and options are selected by the mouse, some UIcontrols are also editable so we can use the keyboard as well Interface controllers

We can create UIcontrols simply by implementing the following syntax handle_to_UI=uicontrol(‘Property Name’,’Property Value’);

Interface controllers UIcontrol types are defined by their ‘style’ property: Check box 'checkbox'Editable text field 'edit' Toggle button 'toggle' 'Pop-up menus 'popupmenu' Push button 'pushbuttonList box 'listbox' Radio button 'radiobutton' Static text 'text' Slider 'slider'Frame 'frame'

Interface controllers are graphic objects Essential properties: Callback – A string with one or more commands that is executed when the controller is activated. May be empty – ''

Example uicontrol('style','pushbutton','callback','close(gcf)');

Interface controllers are graphic objects Essential properties: Callback – A string with one or more commands that is executed when the controller is activated. May be empty - '' Recommendation – always call a function that does what you want.

Interface controllers are graphic objects Essential properties: Callback – A string with one or more commands that is executed when the controller is activated. May be empty - '' Recommendation – always call a function that does what you want. Tag – a string that may be used as a unique identifier of the controller. h = findobj('Tag','1');