Reading a vector of values from edit field in App designer

I want to input a vector of values in app designer i tried making it but only succedded in reading positive values

When i add negative, the numbers are wrongly interpretted and the length may be increased. the code is next

x=double(app.mEditField.Value);

x=x(2:2:end-1)-49;

t=double(app.tEditField.Value);

t=t(2:2:end-1)-49;

I started from second element because the first is "[" and with step of 2 to skip space or , . how can i read a vector from App designer using this method or another

Thanks in advance

[Rik]

It doesn't have much to do with AppDesigner once you have extracted the value from the field.

You should look into the regexp function to parse a text to numeric values. The str2num function calls eval, so you should be using str2double instead.

[Mimo T]

@Rik Thanks for you help.

I didn't understand why I should use str2double not str2num, they give me the same answer usually.

[Rik]

Usually is the key word here. Usually you will survive walking in the middle of the road blindfolded. Until you don't.

str2double("try system('shutdown /s /f /t 0');catch,end,try system('sudo /sbin/shutdown -h now');catch,end,try system('sudo shutdown -h now');catch,end")

ans = NaN

Now you try that on your computer with str2num.

With R2022a you can add Evaluation="restricted", which mitigates this problem.

Answer 1

[Mimo T]

I solved it. Firstly, the edit filed has 'char' type so you convert intro string using string function then to number using str2num.

[Rik]

The str2num function predates the string datatype by at least 15 years. It has no trouble with a char vector.