count nonblank values

14 次查看（过去 30 天）
Patrick
Patrick 2011-1-29
Hi, Can anyone tell me how to count nonblank values in an array? I want to find something like:
if number of nonblank values in A > 5 do something
else move on to next record
Thanks Patrick

请先登录，再回答此问题。

采纳的回答

Andrew Newell
Andrew Newell 2011-1-29
By blank, do you mean blank characters in a string S? If so, you could do this to count the nonblank characters:
num_nonblank = sum(S~=' ');
Or, if S is a cell array of strings,
num_nonblank = sum(~strcmp(S(:),''));
  1 个评论
Patrick
Patrick 2011-1-29
Sorry ,I sould have said string. Thanks, your answer works. Patrick

请先登录，再进行评论。

更多回答（1 个）

Jan
Jan 2011-1-29
If "blanks" means all white space characters like spaces, line breaks, tabs, formfeeds etc:
num_non_blank = sum(~isspace(S));
Equivalent:
num_non_blank = sum(S <= char(32));
The ASCII-code of all control characters and the space are lower than 33. I'm not sure about the effects of multi-byte characters, e.g. Unicode file names.
  1 个评论
David
David 2013-7-2
Isn't there an easy way to get the lengths of non-blank parts of character vectors placed into an array like this:
A = char('Small', 'Medium', 'Very Large')
The answer I'd like is: 5 6 10. I want a one or two-line solution that returns a vector with the lengths of the non-blank parts of each character string in the matrix but counts blanks that fall WITHIN the character string [between words.] In the above case, the matrix A would be 3x10 but I want a function that ignores only the blanks padded onto the end of each string when the matrix is formed and I can't always get the length of the vectors before they're place in the matrix.
David Horton

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Logical 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by