Storing workspace variables that match the specified regular expressions.

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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
  1 Comment
Stephen23
Stephen23 on 7 Jun 2022
"It throws an error"
Note that storing meta-data in variable names makes code slow, complex, inefficient, buggy, and difficult to debug.

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Accepted Answer

Fangjun Jiang
Fangjun Jiang on 7 Jun 2022
Edited: Fangjun Jiang on 7 Jun 2022
see "doc whos"
s=whos('-regexp','^ex_[1]*|^i.\d+')

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