您可以将数据存储在统一的结构中，并使用该结构来生成下拉菜单并推动计算。

考虑以下示例GUI(底部的完整代码)：

这是2个最相关的部分：

function makedummydata(mydatafile)

cases(1).Name = '325LA Precision Acoustics';

cases(1).ntransducers = 2;

cases(1).TransducerConstant1(1) = 28.8;

cases(1).TransducerConstant1(2) = 28.8;

cases(1).TransducerConstant2(1) = 0.72;

cases(1).TransducerConstant2(2) = 6.055;

cases(2).Name = '2100L E&I';

cases(2).ntransducers = 2;

cases(2).TransducerConstant1(1) = 10.267;

cases(2).TransducerConstant1(2) = 28.8;

cases(2).TransducerConstant2(1) = 1.6;

cases(2).TransducerConstant2(2) = 6.055;

save(mydatafile, 'cases');

end

和

function recalc(hObj, ~)

handles = guidata(hObj);

deviceID = handles.devicedd.Value;

transducerID = handles.transducerdd.Value;

fgen1_PNP = str2double(handles.fgen1_PNP.String);

TransducerConstant1 = handles.UserData(deviceID).TransducerConstant1(transducerID);

TransducerConstant2 = handles.UserData(deviceID).TransducerConstant2(transducerID);

voltage = (fgen1_PNP*2 - TransducerConstant1)/TransducerConstant2;

handles.resultsbox.String = voltage;

end

在这里，我创建了一个结构数组，其中每个顶级索引对应于一个设备及其相关常数。 生成GUI时，将在下拉列表中填充所有设备名称，并在传感器列表中填充该设备可用的传感器数量。

当您对下拉列表或fgen1 PNP之一进行更改时，将重新计算电压。 请注意重新计算功能有多简单。 因为我们以MATLAB-ic方式设置了数据结构，所以我们可以轻松地访问所有相关部分，而无需循环，字符串操作或可怕的eval 。

完整的GUI代码：

function testcode

% Set up sample data

mydatafile = 'mydevices.mat';

makedummydata(mydatafile);

buildGUI(mydatafile);

end

function recalc(hObj, ~)

handles = guidata(hObj);

deviceID = handles.devicedd.Value;

transducerID = handles.transducerdd.Value;

fgen1_PNP = str2double(handles.fgen1_PNP.String);

TransducerConstant1 = handles.UserData(deviceID).TransducerConstant1(transducerID);

TransducerConstant2 = handles.UserData(deviceID).TransducerConstant2(transducerID);

voltage = (fgen1_PNP*2 - TransducerConstant1)/TransducerConstant2;

handles.resultsbox.String = voltage;

end

function makedummydata(mydatafile)

cases(1).Name = '325LA Precision Acoustics';

cases(1).ntransducers = 2;

cases(1).TransducerConstant1(1) = 28.8;

cases(1).TransducerConstant1(2) = 28.8;

cases(1).TransducerConstant2(1) = 0.72;

cases(1).TransducerConstant2(2) = 6.055;

cases(2).Name = '2100L E&I';

cases(2).ntransducers = 2;

cases(2).TransducerConstant1(1) = 10.267;

cases(2).TransducerConstant1(2) = 28.8;

cases(2).TransducerConstant2(1) = 1.6;

cases(2).TransducerConstant2(2) = 6.055;

save(mydatafile, 'cases');

end

function buildGUI(mydatafile)

% Generate GUI

h.f = figure('MenuBar', 'none', 'ToolBar', 'none', 'NumberTitle', 'off');

cases = load(mydatafile, 'cases');

h.UserData = cases.cases; % Remove extra layer

h.lbl(1) = uicontrol('Parent', h.f, 'Style', 'Text', ...

'Units', 'Normalized', 'Position', [0.1 0.7 0.6 0.1], ...

'FontSize', 12, 'HorizontalAlignment', 'left', 'String', 'Device Thing');

h.devicedd = uicontrol('Parent', h.f, 'Style', 'popupmenu', ...

'Units', 'Normalized', 'Position', [0.1 0.55 0.6 0.2], ...

'String', {h.UserData(:).Name}, 'Callback', @recalc);

h.lbl(2) = uicontrol('Parent', h.f, 'Style', 'Text', ...

'Units', 'Normalized', 'Position', [0.1 0.5 0.6 0.1], ...

'FontSize', 12, 'HorizontalAlignment', 'left', 'String', 'Transducer Thing');

h.transducerdd = uicontrol('Parent', h.f, 'Style', 'popupmenu', ...

'Units', 'Normalized', 'Position', [0.1 0.35 0.6 0.2], ...

'String', 1:h.UserData(1).ntransducers, 'Callback', @recalc);

h.lbl(3) = uicontrol('Parent', h.f, 'Style', 'Text', ...

'Units', 'Normalized', 'Position', [0.1 0.3 0.3 0.1], ...

'FontSize', 12, 'HorizontalAlignment', 'left', 'String', 'fgen1 PNP Thing');

h.fgen1_PNP = uicontrol('Parent', h.f, 'Style', 'edit', ...

'Units', 'Normalized', 'Position', [0.1 0.25 0.25 0.1], ...

'String', 1);

h.lbl(4) = uicontrol('Parent', h.f, 'Style', 'Text', ...

'Units', 'Normalized', 'Position', [0.5 0.3 0.3 0.1], ...

'FontSize', 12, 'HorizontalAlignment', 'left', 'String', 'Result');

h.resultsbox = uicontrol('Parent', h.f, 'Style', 'edit', ...

'Units', 'Normalized', 'Position', [0.5 0.25 0.25 0.1]);

guidata(h.f, h);

recalc(h.f, 'hi'); % Fire first calc

end