# How to display the row number ?

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Arul prasath on 1 Feb 2015
Answered: Image Analyst on 1 Feb 2015
i want to know how to display a row numbers in this example:
a=[ 'X' 'Y' 'Z'
30.4596 37.6811 93.0000
154.6678 172.8173 91.0000
44.7308 175.6077 94.0000
90.8282 191.0239 91.0000
149.5394 149.1930 70.0000];
b= 'Z'
[93.0000];
tolerance = 0.00001;
% Subtract third columns
matches = abs(a(:,3) - b) < tolerance
% Extract matching rows.
c = a(matches, :)
if you run this code you will get number of matches 'b' with 'a', and now i want that row number also to display, which means that if 'b' is matched with 'a'(column 3), now i have to display the corresponding row number.
Output should be like
d=;%(represent row number)
NOTE: Want to display 'b' is belongs to which number of row's in 'a'

Matt J on 1 Feb 2015
d=find(matches)
Arul prasath on 1 Feb 2015
ya k, but if 'b' is dose not matched with 'a' than it's showing empty matrix like this
" Empty matrix: 0-by-1"
so now i want to delete this " Empty matrix: 0-by-1 " empty matrix.

Image Analyst on 1 Feb 2015