Randi command for a matrix

i am using a random generator for a matrix.

However the randi command is not working for matrix C with following error (Error using randi First input must be a positive scalar integer value IMAX, or two integer values [IMIN IMAX] with IMIN less than or equal to IMAX.)

clear all
clc
A = (textread('data_mat_ta01_11x5.txt'))'
size(A)
B=A/9
C=floor(B)
D=randi(C)

Answer 1

[KALYAN ACHARJYA]

Wrong here,you read a txt file as A and Divide it by 9>>B, Is there any sense??

% Read a text file, variable name A
A = (textread('data_mat_ta01_11x5.txt'))'
size(A)   % No use, you have not assigned to any variable 
B=A/9

and

floor rounds each element of B to the nearest integer less than.

Regarding randi matrix generation: See the following example

%...........[3,4] reperesent the size of the required matrix
>> randi(10,[3,4]);
%........^Max element value in the matrix  
ans =
     9    10     3    10
    10     7     6     2
     2     1    10    10

Rquested you to debug the code, line by line and modify it accordingly. If you are just a beginner on Matlab, I suggested you to go through this

Good Wishes!

[Bilal Khurshid]

Dear Kalyan

Thanks for your response.

I have to make a code for random selection of all matrix values from as assumed interval [1,A/9]

A = (textread('data_mat_ta01_11x5.txt'))' %Reads file data_mat_ta01_11x5.txt and takes values for matrix A with size 11x5

size(A) % Verifies size of matrix A, to confirm it is 11x5

B=A/9 % divides all values of matrix A by 9 to meet the interval condition A/9

C=floor(B) % Converts values of matrix B to integer value as after division some values are decimal

D=randi(C) % Command to randomly select all values of the matrix in the range [1-A/9], however it is not working, is randi command ok for this purpose? or i have to use the range command

[Walter Roberson]

You cannot pass an 11 x 5 array as the first parameter to randi().

D = arrayfun( @(c) randi([1 c]), C);