CODEWITHSUNDEEP
matlab
user2683631
user2683631

Reputation: 101

Create new folders in loop

I have a folder contain numerous subfolder with names that goes as G####### (# is any number between 0-9). I loaded all the subfolders name into a cell called main. For the new folder, if the previous folder start with G then it become I and the ###### behind it woluld also move one place above it, i.e 0->1 4->5 9->0 so on, but I don't know where I coded run, it is getting stuck in the loop.

for i = 3:name_size_main
    str = main{i};
    size_str = size(str);
    j = 1;
    while j ~= size_str(2)
        if strcmpi(j,str(j))==1
            file_name(j)='I';
            j = j+1;
        elseif strcmpi(1,str(j))==1
            file_name(j)='2';
            j = j+1;
        elseif strcmpi(2,str(j))==1
            file_name(j)='3';
            j = j+1;
        elseif strcmpi(3,str(j))==1
            file_name(j)='4';
            j = j+1;
        elseif strcmpi(4,str(j))==1
            file_name(j)='5';
            j = j+1;
        elseif strcmpi(6,str(j))==1
            file_name(j)='7';
            j = j+1;
        elseif strcmpi(8,str(j))==1
            file_name(j)='9';
            j = j+1;
        elseif strcmpi(9,str(j))==1
            file_name(j)='0';
            j = j+1;
        elseif strcmpi(0,str(j))==1
            file_name(j)='1';
            j = j+1;
        end
    end
    mkdir(file_Paths_main,file_name);
end

Upvotes: 0

Views: 667

Answers (1)

Bill Cheatham
Bill Cheatham

Reputation: 11917

I'm going to answer your question in two parts – first by proposing a simple way of solving your overall problem, then next to examine the problems with your loop.

Solving your problem

A simple way of solving your overall problem is like so:

str = 'G102019'
file_name = char(str + 1)
file_name(str=='9') = '0'

file_name =

H213120

To understand this, note that each character has an associated number - e.g. capital 'A' is represented by number 65:

>> double('A')

ans =

    65

This number can be manipulated and converted back to a character using char:

>> char(65+3)

ans =

D

And also note that the numbers representing characters come in a nice order:

>> char(33:100)

ans =

!"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcd

...So all your characters in your original string can be 'pushed up one' just by adding 1 to their numerical representation. I need a hack to deal with the case of 9->0, but apart from that all should be well.

Your loop problem

The main problem with your loop is that if none of the if statements ever execute, j is never incremented so the while is always met. Move j=j+1 outside of the if statements to ensure it is always incremented.

The reason none of the if statements are met is because:

a) The first char in str is not any of the numbers 0-9,

and

b) strcmpi requires two strings as input, but you are giving a number and a string - i.e.:

>> strcmpi(2, '2')

ans =

     0

Upvotes: 1

Related Questions