How to extract the first part of an array of strings by pattern?

Hi,

I have an array of strings: L_Name. Each string has several "_" in it. I would like to have an array that take the first part in each string by '_'. I tried to use strfind, or reg, but just cannot get it.

How to do that? Thanks! JF

Answer 1

[Stephen23]

If you want the part of the string before the first underscore '_', then you can use regexp:

>> C = {'L_Name','Z_Y_X','Aaaa_BBBB','MMM'};
>> D = regexp(C,'[^_]+','once','match');
>> D{:}
ans = L
ans = Z
ans = Aaaa
ans = MMM
>>

[JFz]

Thanks.

[Image Analyst]

The nice thing is, it also works for an array of strings (the new string data type that MATLAB now has) in addition to the cell array Stephen showed:

C = ["L_Name","Z_Y_X","Aaaa_BBBB","MMM"]
D = regexp(C,'[^_]+','once','match');
D{:}