needed some help with this ERROR function

function fireworks %% global AxesSize ; AxesSize = 70000 ; figure('MenuBar','none', 'ToolBar','none'); Handle = gcf ; while 1 Num = 100 ; Radio = 0:360/Num:360 ; V = rand(1,Num+1)*3000 ;

    % 
    RandX = rand ;
    if RandX<0.5
        RandX = -RandX ;
    end
    Lx0 = RandX*50000;
    RandY = rand ;
    if RandY<0.5
        RandY = -RandY ;
    end
    Ly0 = RandY*50000;
    test_fashe(Handle, Lx0, Ly0) ;

    % 
    test_press(Lx0, Ly0, Radio, V, Handle) ;
    if ~ishandle(Handle)
        break ;
    end
end

% ------------------------------------ function test_fashe(Handle, Lx0, Ly0) %%

Num = 20 ; XStep = (Lx0+0) / Num ; YStep = (Ly0+50000) / Num ;

% start position XData = 0 ; YData = -50000 ;

global AxesSize ; LineHandle=plot([XData,Lx0],[YData,Ly0],'b-','LineWidth',3, 'Visible', 'off') ; set(gca,'XLim',[-AxesSize,AxesSize],'YLim',[-AxesSize,AxesSize],... 'color',[0 1 1],'XTick',[],'YTick',[]) ;

for i = 0 : Num-1

    BeforeXData = XData ;
    BeforeYData = YData ;
    XData = BeforeXData+XStep;
    YData = BeforeYData+YStep;

    if ~ishandle(Handle)
        return ;
    end

    set(LineHandle, 'XData', [BeforeXData,XData], ...
        'YData', [BeforeYData,YData], 'Visible', 'on' ) ;
    set(gca,'XLim',[-AxesSize,AxesSize],'YLim',[-AxesSize,AxesSize],...
        'color',[0 1 1],'XTick',[],'YTick',[]) ;
    pause(0.03) ;
    drawnow ;
end

% ------------------------------------ function test_press(Lx0, Ly0, Radio, V, Handle) %%

g = 10 ; t = 0:0.2:40 ; Detal = 3.1415926/180 ; Ttime = length(t) ;

global AxesSize ;

% Vx = V.*sin(Detal.*Radio) ; Vy = V.*cos(Detal.*Radio) ;

ColorStr = {'r','g','b','k','y'} ;

RandValue = randperm(5) ; CurColor = ColorStr{RandValue} ; for i = 1:Ttime Vx = (Ttime-1)*Vx/Ttime ; Vy = (Ttime-1)*Vy/Ttime ;

    Lx = Lx0 + Vx.*t(i) ;
    Ly = Ly0 + Vy.*t(i) - 0.5*g*t(i)^2 ;

    if ~ishandle(Handle)
        return ;
    end

    plot( Lx, Ly, 'o',...
        'MarkerEdgeColor',CurColor,...
        'MarkerFaceColor',CurColor,...
        'MarkerSize',10) ;
    set(gca,'XLim',[-AxesSize,AxesSize],'YLim',[-AxesSize,AxesSize],...
    'color',[0 1 1],'XTick',[],'YTick',[]) ;

    drawnow ;
end

% MarkerSize = 10 ; Ttime = 200 ; for i = 1 : Ttime MarkerSize = MarkerSize - 0.05 ; if MarkerSize <= 0 MarkerSize = 0.01 ; end Ly = Ly - 100 ;

    if ~ishandle(Handle)
        return ;
    end

    plot( Lx, Ly, 'o',...
        'MarkerEdgeColor',CurColor,...
        'MarkerFaceColor',CurColor,...
        'MarkerSize',MarkerSize) ;
    set(gca,'XLim',[-AxesSize,AxesSize],'YLim',[-AxesSize,AxesSize],...
    'color',[0 1 1],'XTick',[],'YTick',[]) ;
    drawnow ;
end

[John D'Errico]

So, what is the problem? Explain your problem.

Else we must we read through your code line by line, figuring out first what it is you need to do from the code, then try to figure out what is your problem. That could easily take nearly as long as it took you to write the above code.