why my variable value become these sysbols?

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JI RONG
JI RONG 2022-12-2
评论： Les Beckham 2022-12-2
InfoImage = imfinfo(filename);
Width = InfoImage.Width;
Height = InfoImage.Height;
app.SizeImageEditField.Value = [Width,'x',Height];
This is my code. Thanks.

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采纳的回答

Les Beckham
Les Beckham 2022-12-2
Probably because Width and Height are not character vectors, but numeric doubles instead.
Try this:
InfoImage = imfinfo(filename);
Width = num2str(InfoImage.Width);
Height = num2str(InfoImage.Height);
app.SizeImageEditField.Value = [Width,'x',Height];

更多回答（1 个）

Steven Lord
Steven Lord 2022-12-2
Ran in:
When you concatenate together a char vector and a number, MATLAB does not convert the number into its character representation. It converts it into a character based on its value. From the display and some guess and check on the Unicode tables I'm guessing your image is somewhere around 1670 columns wide? I haven't tried to look for the width character.
x = 0x686
x = uint16 1670
c = char(x)
c = 'چ'
If you want to combine text data and numeric data and have the number converted to its character representation, one easy way to do that is to use a string array and the + operator (which for string arrays is concatenation.)
s = 1670 + " x " + 800
s = "1670 x 800"

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