how to clear ui control callback error

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Reference to non-existent field 'x1'.

Error in aliwork>pushbutton1_Callback (line 188)

x1=handles.metricdata.x1;

Error in gui_mainfcn (line 95)

feval(varargin{:});

Error in aliwork (line 19)

gui_mainfcn(gui_State, varargin{:});

Error while evaluating UIControl Callback.

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how to clear this error????

Answer 1

[Adam Danz]

In this line

x1=handles.metricdata.x1;

"x1" is not a field within the structure "metricdata". "metricdata" is most likely a handle to a graphics object or some object within your GUI. To confirm,

isstruct(handles.metricdata)        % confirm that handles.metricdata is a stucture
% To see fields,
handles.metricdata                  
%-or-
fieldnames(handles.metricdata)