hslider=findobj('Tag', 'xText') returns 0x0 empty GraphicsPlaceholder array.
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>> SliderTool
>> hslider=findobj('Tag', 'xText')
hslider =
0x0 empty GraphicsPlaceholder array.
>>
Why is this application giving this error?
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采纳的回答
Walter Roberson
2017-9-30
hslider = findobj(0, 'Tag', 'xText')
4 个评论
Walter Roberson
2017-9-30
all_tag_objects = findall(0, '-property', 'tag');
all_tags = get(all_tag_objects, 'tag');
[tf, idx] = ismember('xText', all_tags);
if tf
fprintf('tag was found, object was\n');
all_tag_objects(idx)
else
fprintf('tag not found. Complete list of tags is:\n');
unique(all_tags)
fprintf('\n');
x_tag_names_cell = regexp(all_tags, '^x', 'match');
mask = ~cellfun(@isempty, x_tag_names_cell);
x_tag_names_cell = x_tag_names_cell(mask);
if isempty(x_tag_names_cell)
fprintf('No tags beginning with "x" were found\n');
else
fprintf('Tags beginning with "x" are:\n');
x_tag_names_char = char(x_tag_names_cell);
disp(x_tag_names_char)
fprintf('\nThe decimal equivalent of which is:\n')
disp(0 + x_tag_names_char)
end
end
更多回答(1 个)
Image Analyst
2017-9-30
Why not just say
hSlider = handles.xText;
that is, if you even need to use it at all, which you probably don't. You can get strings like this:
editBoxContents = handles.xText.String;
You can set strings like this:
handles.xText.String = 'Enter an x value here';
另请参阅
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