Appdesigner 'Value' must be double scalar

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Lola
Lola 2022-5-24
评论： Lola 2022-5-24
I am trying to pass numerical values into the Numeric Edit Field on appdesigner. The values are being extracted from the sensor and displayed in a csv file using PuTTy. The csv file is continuously updating and I can view the results in matlab command window as the results update on PuTTy in realtime. However when I try to view it in appdesigner I get the error 'Value' must be double scalar. I'm not sure how I can solve this. Kindly assist

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Cris LaPierre
Cris LaPierre 2022-5-24
编辑：Cris LaPierre 2022-5-24
The Value property can only be a single numeric value (that's what is meant by 'double scalar'). It is likely the result of csvread is an array instead.
Try modifying your app designer code to app.EditField.Value = x(end);
Another issue might be if x is not a double. In that case, you would need to covert the value ot a double too: app.EditField.Value = double(x(end));
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Cris LaPierre
Cris LaPierre 2022-5-24
Good point. The code specifies the starting row and column, but that does not constrain to to a single value, or a specific column. All contents in the file after the starting point are read in.
If it is value (2,0) that you want each time, perhaps try app.EditField.Value = x(1);
Lola
Lola 2022-5-24
The app.EditField.Value = x(end) solves this error. I wanted to view the results in realtime and that works perfectly.
Thank you so much for the help and insight on other potential errors

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