vector array in matlab

assume i have folllowing vector column named as ALT_digit_

i want to know the number of times 'hi' comes in the vector column.

Answer 1

[KSSV]

LEt A be your cell array.

idx = contains(A,'hi') ;
nnz(idx)

Answer 2

[Adam Danz]

See strcmp (case senstive) or strcmpi (case insensitive) to compare a vector of strings to a single string. Those functions will return a logical vector. Then add the vector using sum() to count the number of matches.

n = sum(strcmpi(T.ALT_digit, 'hi'))

[Adam Danz]

If your only string values are 'hi' 'lo' or '' and your Matlab release is R2016b or later, this solution is perfectly fine. But if you're using a release prior to 16b or combinations of 'hi' and 'lo', consider using a different method.

Answer 3

[Image Analyst]

Yes another way : using ismember():

ALT_digit = {'lo', '', '', '', 'lo', '', '', '', 'lo', '', 'abc'}
rows = ismember(ALT_digit, 'lo')
count = sum(rows)