Is there a way to get the num2str without spaces?

Question

Akshar Agarwal 2017-10-12

评论： Akshar Agarwal 2017-10-12

I have a matrix, a=[1:100]. I want to get a matrix c, with the digits of 1:100. To do so, I first did

b=num2str(a),

which gets me the string version but it has spaces. If it did not have spaces, I could make a loop as follows:

for i=1:size(b,2) 
  c(i)=b(i);
end

Since the num2str(a) has spaces, I cannot just select the ith element of b and get something meaningful.

Answer 1

Image Analyst 2017-10-12

Try sprintf():

b = sprintf('%d', a);  % If a is an integer.
b = sprintf('%f', a);  % If a is a double.

Image Analyst 2017-10-12

Or

c = sprintf('%d, ', b); % b is an array.

which will put a comma and a space between all the numbers and return a single string called c with all the numbers in it.

Akshar Agarwal 2017-10-12

Thanks, could you explain the %d and %f please?