How to get the row indices

Hi,

I have the below array, and I want to get the idices of names starting with PRS.

PRS.BG02K65E5T9
PRS.UG02K145E5T20
Ark.prgrma
YUI_PRS.UG02K145E5T20
PRS.GG02K200E6T20

1. I want to know which row of name start with PRS. (row1,2,5) 2. Count of names starting with PRS. and not start with PRS. (3 &2)

Many thanks in advance,

[Steven Lord]

How is the data stored? As a char array, as a cell array each element of which is a char vector, as a string array, etc.? And which release of MATLAB are you using?

[Kanakaiah Jakkula]

cell array

Answer 1

[Walter Roberson]

S = { 'PRS.BG02K65E5T9',
      'PRS.UG02K145E5T20',
      'Ark.prgrma',
      'YUI_PRS.UG02K145E5T20',
      'PRS.GG02K200E6T20'};

find(strncmp(S,'PRS',3))

[Kanakaiah Jakkula]

I also want to know the count of of names starting with PRS and not starting with PRS: my output should be [3 2]

[Walter Roberson]

mask = strncmp(S,'PRS',3);
row_indices = find(mask);
match_count = sum(mask);
nonmatch_count = sum(~mask);