MATLAB : user choose the limits of the xaxis

Hello,

I have a graph in a figure and I would like to put some buttons to allow the user to choose the beginning of xaxis and the end.

For example, if my x axis is 1:1:10. And the user choose xmin=2 and xmax=6. I would like to plot only this part. After, with a button reset, all the courb will be plot again.

How can I do that ?

Thank you in advance,

Best regards,

Answer 1

[Brendan Hamm]

The following code creates a plot of the input data. It has 2 text boxes which are editable and upon pushing the 'Update' button will change the XLim property of the axes.

    function btnUpdate(x,y)

        f = figure;
        a = axes('Position',[0.075 0.25 0.85 0.65]); 
        p = plot(x,y);

        lwLim = uicontrol(f,'Style','edit',...
            'Units','Normalized','Position',[0.20 0.1 0.2 0.05]);
        lwTxt = uicontrol(f,'Style','text',...
            'Units','Normalized','Position',[0.10 0.09 0.1 0.05],...
            'String','xMin:');
        upLim = uicontrol(f,'Style','edit',...
            'Units','Normalized','Position',[0.60 0.1 0.2 0.05]);
        upTxt = uicontrol(f,'Style','text',...
            'Units','Normalized','Position',[0.50 0.09 0.1 0.05],...
            'String','xMax:');
        btn = uicontrol(f,'Style','pushbutton',...
            'Units','Normalized','Position',[0.85 0.05 0.1 0.05],...
            'String','Update','Callback',@btnCallback);

        function btnCallback(src,evt)
            a.XLim = [str2num(lwLim.String) str2num(upLim.String)];
        end

    end

For a sample call:

x = -3*pi:pi/50:3*pi;
y = sin(x);
btnUpdate(x,y);

Play with the axes and have fun!

[Brendan Hamm]

I should point out in versions prior to 2014b the callback function line should read:

set(a,'XLim',[str2num(lwLim.String) str2num(upLim.String)]);