Storing workspace variables that match the specified regular expressions.

How do we store workspace variables identifed using regular expressions.

Consider the following example below...

ex_1 = 5;
ex_2 = 3;
i_i = 4;
%if I do this 
whos -regexp ^ex_[1]*|^i.\d+

  Name      Size            Bytes  Class     Attributes

  ex_1      1x1                 8  double              
  ex_2      1x1                 8  double              

%it works
%but if I do this
s = whos(-regexp ^ex_[1]*|^i.\d+);

Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters.

%it throws an error

[Stephen23]

"It throws an error"

See: https://www.mathworks.com/help/matlab/matlab_prog/command-vs-function-syntax.html

Note that storing meta-data in variable names makes code slow, complex, inefficient, buggy, and difficult to debug.

Answer 1

[Fangjun Jiang]

see "doc whos"

s=whos('-regexp','^ex_[1]*|^i.\d+')