Cannot call INPUT from EVALC. in my code

x=input('x=[1，2，3，4]');

sizex=size(x);

a=sizex(1);

b=sizex(2);

if a==1&&b==1

value=x;

position=1;

elseif (a==1&&b~=1)||(b==1&&a~=1)

value=x(1);

for i=1:length(x)

if x(i)>value

value=x(i);

position=i;

end

end

else a~=1&&b~=1

position=ones(1,b);

for ii=1:b

for jj=1:a

if x(jj,ii)>value(ii)

value(ii)=x(jj,ii);

position(ii)=jj;

end

end

end

end

a=input('output：');

if a==1

value

elseif a==2

value

position

else

error('error')

end

Answer 1

[Sanju]

Hi Hanming,

I understand that you want call “input” from “evalc” function.

In the provided code, the “evalc” function is not necessary because there is no need to evaluate any dynamically generated code or expressions. The code is written in a straightforward manner and does not require the use of “evalc” to execute any additional code.

MATLAB's “evalc” function evaluates the specified expression or statements that are stored as strings and captures anything that would normally be written to the Command Window in results. MATLAB prevents the use of input within “evalc” to avoid potential issues with unexpected user interaction when evaluating code. It can be useful in certain scenarios, such as when you want to dynamically generate and execute code based on user input or when you want to evaluate expressions stored in variables.

You can also refer to the following documentation links for more information,

evalc: https://www.mathworks.com/help/matlab/ref/evalc.html

Alternatives for eval: https://www.mathworks.com/help/matlab/matlab_prog/string-evaluation.html

Hope this helps!

[Hanming]

Thank you for your reply, I have been busy with exams these last few weeks and didn't see your reply.