Choose any workspace from dbstack for evalin

I wrote an App to add lines to axes. I need to pass some variables from the workspace where this App is called to the private handling function of this App.
function demoFcn()
fs = 20e3;
t = 1/fs:1/fs:1;
f = 100;

figure;
subplot(1, 2, 1);
plot(t, cos(2*pi*f*t));
% call drawLineApp to specify X and Y for extra lines in this axes
drawLineApp(gca);
end
For example, after finishing drawing some lines, I call this to draw in the existed subplot and I have two input text box in my App for x and y, where x=t and y=sin(2*pi*f*t). Both f and t are existed variables in the workspace of the drawing function (indeed, the drawing is not done in the base workspace). If I use:
methods (Access = private)
function drawButtonPushed(app, event) % button callback function
drawLineImpl(app);
end

function drawLineImpl(app)
% app.X is string "t" from the input text box
% app.Y is string "sin(2*pi*f*t)"
% app.target is the target axes to plot
% app.params is the plotting parameter cell array
X = evalin("caller", app.X);
Y = evalin("caller", app.Y);
plot(app.target, X, Y, app.params{:});
end
end
I would not get the desired result because ‘caller’ does not point to demoFcn().
So I want to track in the function stack where drawLineApp() is last called using dbstack. But evalin specifies workspace only with options ‘base’ and ‘caller’. It comes to me whether I can specify any workspace found in the dbstack here.
By the way, I know that dbup can change the current workspace but only in debug mode. It does not work well in my case.I wrote an App to add lines to axes. I need to pass some variables from the workspace where this App is called to the private handling function of this App.
function demoFcn()
fs = 20e3;
t = 1/fs:1/fs:1;
f = 100;

function drawLineImpl(app)
% app.X is string "t" from the input text box
% app.Y is string "sin(2*pi*f*t)"
% app.target is the target axes to plot
% app.params is the plotting parameter cell array
X = evalin("caller", app.X);
Y = evalin("caller", app.Y);
plot(app.target, X, Y, app.params{:});
end
end
I would not get the desired result because ‘caller’ does not point to demoFcn().
So I want to track in the function stack where drawLineApp() is last called using dbstack. But evalin specifies workspace only with options ‘base’ and ‘caller’. It comes to me whether I can specify any workspace found in the dbstack here.
By the way, I know that dbup can change the current workspace but only in debug mode. It does not work well in my case. I wrote an App to add lines to axes. I need to pass some variables from the workspace where this App is called to the private handling function of this App.
function demoFcn()
fs = 20e3;
t = 1/fs:1/fs:1;
f = 100;

function drawLineImpl(app)
% app.X is string "t" from the input text box
% app.Y is string "sin(2*pi*f*t)"
% app.target is the target axes to plot
% app.params is the plotting parameter cell array
X = evalin("caller", app.X);
Y = evalin("caller", app.Y);
plot(app.target, X, Y, app.params{:});
end
end
I would not get the desired result because ‘caller’ does not point to demoFcn().
So I want to track in the function stack where drawLineApp() is last called using dbstack. But evalin specifies workspace only with options ‘base’ and ‘caller’. It comes to me whether I can specify any workspace found in the dbstack here.
By the way, I know that dbup can change the current workspace but only in debug mode. It does not work well in my case. evalin, workspace, dbstack MATLAB Answers — New Questions

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