hi.... my question is how to store string in matrix form and the matrix should me nxn matrix and it should take only square number for example 2x2 or 4x4 or 8x8 or 16x16 etc... please help me

We are doing a project on data encryption and data decryption please help us with code.. my question is how to store string in matrix form and the matrix should me nxn matrix and it should take only square number for example 2x2 or 4x4 or 8x8 or 16x16 etc... please help me

[Geoff Hayes]

radjhika = please provide an example. Do you wish to reshape a string of characters (or numbers?) into a square matrix? For example,

 myString = 'boat';
 reshape(myString,2,2)

 ans =

    ba
    ot

Or are you trying to do something else? Clarify the encryption algorithm that you are trying to implement and discuss the problems that you are having when trying to code it up. Include a sample of your code.

[radhika s gowda]

It should take string as input.. If size is lesser than 4 then it should take 2x2 matrix or if it is lesser than 16 letters it should take 4x4 matrix and for example in 4x4 if it is 13 characters then remaining letters should be replaced with zeros... Example: Enter string math lab is easy m a t h l a b i s e a s y 0 0 0

After the given string remaining cells should be replaced with 'zeros' as shown in above example.

[Walter Roberson]

2 is not a square number in 2x2,so you are allowing non-square numbers. If the output array needs to be square then why is 3x3 or 6x6 not allowed?

[radhika s gowda]

Ya... Your correct but if we need to store the string to matrix for example take string as radhikasg it should be in 3x3 means r a d h i k a s g So how can i store this...

Answer 1

[Walter Roberson]

L = length(YourString);
N = ceil(sqrt(L));
A = char('0' * ones(N,N));
A(1:L) = YourString;

Answer 2

[KSSV]

You can define the strings into a cell. Check the example below:

 m = 2 ;
 iwant = cell(2) ;
 iwant{1,1} = 'I' ;
 iwant{1,2} = 'LOVE' ;
 iwant{2,1} = 'MAT' ;
 iwant{2,2} = 'LAB' ;
 iwant = 
    'I'      'Love'
    'MAT'    'LAB'

You can put your strings in a loop and fix the positions where ever you want. You can access the strings by iwant{i,j}, where i = 1:2, and j = 1:2. I hope this is the one you are looking for.

Answer 3

[radhika s gowda]

        m a t l
m=      b  i  s e
        a  s  y 0
        0  0  0 0

for the above matrix the actual string length matlabiseasy string lengtg is 12 I want a function that removes the zeros from matrix using string length and to display the content of matrix in string please please help me....

[Walter Roberson]

NO_0 = @(M) M(M ~= '0');
NO_0(m.')