I get an error, what's wrong? The 'STRING' input must be either a char row vector or a cell array of char row vector

Hi

I tried to build an app that using below code

----

clear 

close all

clc

temp = char('');

while (~ strcmp(temp, 'yes'))

      temp = input('Input text here: ','s');
  end

After using "Application Compiler" to build the App

I ran exe file, the below message display.

I used R2016a, what was wrong? Please advise!

[Kevin Chng]

I don't have error with R2018b, however, may i ask you that do you have error in running them in MATLAB?

[Walter Roberson]

That appears to be a script. As far as I understand, it is not possible to use the application compiler with a script, only with a function.

Those clear and close and clc are not doing you any good and should be removed for application compiler.

[Phan Anh Hoang]

@Kevin Chng: This code is running well in MATLAB. Only after build in APP, the error is displayed. @Walter Roberson: Thank you! I tried the code that removed clear, close, clc but the same error displayed.

[Kevin Chng]

How about you put function to your script? And delete clear,close,clc

[Dennis]

How does input work in an app? Usually it ask for an input at the command line, but is that an option for a standalone?

Have you tried using inputdlg instead?

[Phan Anh Hoang]

@ Kevin Chng: I don't understand what do you mean. I tried to delete clc, clear, close but the same error.

@ Dennis: The code is worked with inputdlg, but i'd like to use input. Thank you so much.

[Kevin Chng]

function hi()
temp = char('');
while (~ strcmp(temp, 'yes'))
    temp = input('Input text here: ','s');
end
end

[Phan Anh Hoang]

@Kevin: Thank you! The same error displayed.

[Dennis]

I don't think this will work with input. The app is supposed to run without Matlab running or even installed. Hence there is no command line.

Where should you enter anything?

[Phan Anh Hoang]

@Dennis: This app need to build with runtime included in package to make sure the App will running without Matlab.

Actually, I wrote a code that using several input from keyboard (prompt as DOS) and it was successfully build in to app two months ago. This week, I update the code and rebuild it but the error appeared on the first command that using "input" function. I tried to figure it out by writing a simple test code as posted above. The error is the same, wherever the input function is call.

I think the problem is somewhere of configuration or Matlab's version.

Answer 1

[Phan Anh Hoang]

I solve it. There is an option in Additional running settings in Application Compiler.

We need to uncheck the "Do not display the Windows Command Shell (console) for execution"

That all. The Input still can using.

[Daniya Zafar]

Hi Phan, I am using 2021a and get the same error. How do you get to Additional runtime settings?

Weird thing is, everything was working yesterday, I didn't change anything. But now, I get this:

Error using regexprep

The 'STRING' input must be either a char row vector, a cell array of char row vectors, or a string array.

Answer 2

[KSSV]

I am not sure, but have a try on this :

close all
clc
temp = cell([],1) ;
temp{1} = char('') ;
count = 1 ;
while (~ strcmp(temp{count}, 'yes'))
    count = count+1 ;
    temp{count} = input('Input text here: ','s');
end

[Phan Anh Hoang]

Thank KSSV, the same error. I think this is problem of scrip or version. But could not figure it out.