weird situation while using sprintf to generate a long string with 0 (probability of 0.5) and 1 (probability of 0.5) with space in between two adjacent characters

I use the following to generate a length 100 vector:

a = sprintf('%d ', randi([0 1], 1, 100));

When I try length(a), it gives me 200. If I say a(1:10), only the first 5 elements are printed out. However, sometimes "a = sprintf('%d ', randi([0 1], 1, 100));" gives me the correct result.

Can somebody point out how to make the output of "a = sprintf('%d ', randi([0 1], 1, 100));" stable?

You are welcome to refer to a related topic at https://www.mathworks.com/matlabcentral/answers/478585-generating-long-string-with-0-probability-of-0-5-and-1-probability-of-0-5-with-space-in-between?s_tid=ab_new_mlc_ans_email_view#answer_390090.

Thanks in advance!

[Rik]

You want 0 or 1 and a space. That means for 100 values, your array has length 200. If you select the first 10 elements from the char array, you will see 5 values and 5 spaces. What is your question?

[Monkey]

Thanks for your hint. I have fixed the problem. I simply converted the string array into numerical arrays containg 0/1 with no space. This is what I need. Thank you.

[Monkey]

I think Rik's comment can be taken as the answer to the questions.

Answer 1

[Rik]

Since this was the solution to the problem, I'll move my comment to the answer section.

Your code creates an array of 0 or 1 and a space. That means for 100 values, your array has length 200. If you select the first 10 elements from the char array, you will see 5 values and 5 spaces.

The observed behavior is therefore expected. If you want to change this you can consider removing the space from the formatspec or use a cell array.