文字列から指定数だけ削除

文字列（string）のうしろから3文字（空白を含む）を削除したいです．

どのようにすると良いでしょうか？

例）

A=

"aaa 01"

"bbb 02"

"aaa 02"

"bbb 03"

"ccc 04"

．．．

削除→　

A=

"aaa"

"bbb"

"aaa"

"bbb"

"ccc"

．．．

Answer 1

[Dyuman Joshi]

A = ["aaa 01"
"bbb 02"
"aaa 02"
"bbb 03"
"ccc 04"]

A = 5x1 string array
    "aaa 01"
    "bbb 02"
    "aaa 02"
    "bbb 03"
    "ccc 04"

%Number of characters from end to delete
n = 3;

B = extractBefore(A, strlength(A) - n +1)

B = 5x1 string array
    "aaa"
    "bbb"
    "aaa"
    "bbb"
    "ccc"

[H.O]

Thank you so much.

[Dyuman Joshi]

You're welcome!