CODEWITHSUNDEEP
matlab
Sufiyan Ghori
Sufiyan Ghori

Reputation: 18753

Pre-allocating the String size in Matlab

I am very well aware on how to pre-allocate Matrix sizes using ones, zeros and cell command but what about a String ?

Suppose I have a Matrix named data whose each value is between 1-255 now if i want to print these number's ASCII characters instead of numbers it selves, I'd do that,

msg='';

    for i = 1 : length(data)
        msg=horzcat(msg,floor(data(i))); % horzcat doesn't ignore spaces
    end

msg

in the above code Matlab is unaware of the size of the msg before the loop ends, What i really want to do is to declare the size of the variable msg before the loop starts.

How can i do that ?

Upvotes: 2

Views: 8216

Answers (1)

abcd
abcd

Reputation: 42225

You can use char to preallocate a string just as you would a matrix (a string is just a char array):

msg = char(zeros(100,1));

However, this is probably not what you need (I haven't seen anyone preallocate a string for anything). Given that this is what you want to do

Suppose I have a Matrix named data whose each value is between 1-255 now if i want to print these number's ASCII characters instead of numbers it selves

you can simply do char(data) to display the ASCII/Unicode values.

Upvotes: 4

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