Please help me in generating a random string(row vector) in which each element has a different upper bound.

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MANISH KUMAR 2017-2-23

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https://ww2.mathworks.cn/matlabcentral/answers/326498-please-help-me-in-generating-a-random-string-row-vector-in-which-each-element-has-a-different-upper

编辑： Massimo Zanetti 2017-2-23

采纳的回答： Massimo Zanetti

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For example, I want to generate a row vector A randomly

A = [ 4 2 6 1 5 ];

Whose elements are bounded by an upper bound

UB = [ 5 4 6 3 5 ]

E.g. the first element of A can take any integer value between [0 – 5] and second element can take any integer value [0 – 4] and similarly other elements are bounded.

Now from this row vector 'A', N (length (A)), new vectors are to be generated. In each vector, an element of the vector A changes the value randomly within the upper bound and rest of the elements remains same. For example, for above vector A

A = [ 4 2 6 1 5 ];

New vectors are

A1 = [ 3 2 6 1 5 ];
A2 = [ 4 1 6 1 5 ];
A3 = [ 4 2 3 1 5 ];
A4 = [ 4 2 6 3 5 ];
A5 = [ 4 2 6 1 2 ];

Please help. Thanks in anticipation!

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Answer 1

Massimo Zanetti 2017-2-23

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编辑：Massimo Zanetti 2017-2-23

在 MATLAB Online 中打开

The useful way is

U = [2,3,4,5,7];
A = arrayfun( @(x) randi([0,x]) , U )

but, if upper-bounds are 1-digit numbers, you can lighten the procedure by generating one random integer between 0 and N, where N is the number obtained by merging your 1-digit upper bounds. An example:

%your input
U = [5,4,6,8,6];
%merge digits
N = str2double(char(U+'0'))
%get random number between 0 and N
An = randi([0,N])
%get a vector of An digits
A = num2str(An)-'0'
N = 
  54686
An =
  34015
A =
  [3 4 0 1 5]