How can I transform a number to string with space using num2str?

50 次查看（过去 30 天）
Jung-Woo
Jung-Woo 2013-12-5
评论： Jung-Woo 2013-12-9
What is the result of "num2str(1,'%2d')"? I think it should be " 1", but the results is "1". I mean there is no space before "1". Actually, the result of "num2str(1,'%02d')" is "01", and the result of "num2str(1,'%-2d')" is "1". And, the result of "sprintf('%2d',1)" is " 1".
How can I transform a number to string with space using num2str?

请先登录，再回答此问题。

采纳的回答

Simon
Simon 2013-12-9
Hi!
Maybe this way?
num = [1000; 1001];
% numeric part
numpart = arrayfun(@(x) sprintf('%2d', mod(x,100)), num, 'UniformOutput', false);
% letter part
letterpart = char(mod(num,26*100)./100+65);
% concat everything
retsult = strcat(letterpart, numpart)

更多回答（2 个）

Walter Roberson
Walter Roberson 2013-12-5
Use sprintf instead of nu2str()
sprintf('%2d', 1)
  3 个评论
显示 1更早的评论
Walter Roberson
Walter Roberson 2013-12-9
numt = num(:).'; %make sure it is row vector
rem100 = mod(numt, 100);
lead2600 = mod((numt - rem100) ./ 100, 26) + 65;
longstr = sprintf('%c%2d\n', [lead2600; rem100]);
strs = regexp(longstr, '\n', 'split');

请先登录，再进行评论。

Jung-Woo
Jung-Woo 2013-12-9
Let me ask another way. Actually, I am trying to convert some numbers to alphabatical ID including alphabet and 2 digit numbers.
For example,
num = [1000; 1011];
cellstr([char(mod(num,26*100)./100+65),num2str(mod(num,100),'%2d')])
ans =
'K 0'
'K11'
That is what I want to have. But, if num = [1000; 1001], the 2-digit numbers become just 1-digit numbers like:
num = [1000; 1001];
cellstr([char(mod(num,26*100)./100+65),num2str(mod(num,100),'%2d')])
ans =
'K0'
'K1'
Here, my question is how I can fix the number of digit to 2. My expectation is:
ans =
'K 0'
'K 1'
  1 个评论
Walter Roberson
Walter Roberson 2013-12-9
You cannot use num2str() for this purpose. In situations in which every entry ends up with a leading blank, num2str() will strip off the leading blank.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Data Type Conversion 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