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How can I delete variables whose name contains a specific word?

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arturo popoli
arturo popoli 2016-10-9
编辑： Jan 2016-10-17
Let's say that I have three variables: var_red, var_blue, var_green, var2_blue
How can I specify to delete all the variables containing the word "blue"?
Thank you very much

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采纳的回答

Massimo Zanetti
Massimo Zanetti 2016-10-9
The Matlab "clear" command accepts wildcards, so you can do
clear *blue;

更多回答（2 个）

Guillaume
Guillaume 2016-10-9
编辑：Guillaume 2016-10-9
See the clear documentation. The option that interests you is the -regexp one. In your case:
clear -regexp blue
will remove any variable with blue anywhere in their name.
Jan
Jan 2016-10-17
编辑：Jan 2016-10-17
Although the clear * methods works, consider that this is a bad programming pattern: Do not hide information in the names of variables. Data should be carried as value, not inside the name.
var(1).value = 123;
var(1).color = 'red';
var(2).value = 456;
var(2).color = 'blue';
toDelete = strcmp({'var.color'}, 'red');
var(toDelete) = [];
Then variables like "nabluencode" or "credentials" are not removed accidently.

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