# how to generate random number

6 views (last 30 days)
ueqweoıqwueoq on 8 Mar 2024
Answered: Hassaan on 8 Mar 2024
Hi,
k = 3;
randomNumbers = randi([1, 2], [1, k])
randomNumbers =
1 1 1
I wrote this, but I need decimal numbers from smallest to largest between 1 and 2. What should I do for it?

Dyuman Joshi on 8 Mar 2024
randi only generates integers. Use rand instead.
rand() generates numbers in the range (0,1). Get the desired range by modifying it accordingly -
k=3;
y = rand(1,k) + 1
y = 1×3
1.0964 1.6433 1.6246
##### 3 CommentsShow 1 older commentHide 1 older comment
Dyuman Joshi on 8 Mar 2024
John D'Errico on 8 Mar 2024
From small to large? Nothing stops you from sorting the numbers after you generate them.
help sort
SORT Sort in ascending or descending order. B = SORT(A) sorts in ascending order. The sorted output B has the same type and size as A: - For vectors, SORT(A) sorts the elements of A in ascending order. - For matrices, SORT(A) sorts each column of A in ascending order. - For N-D arrays, SORT(A) sorts along the first non-singleton dimension. B = SORT(A,DIM) also specifies a dimension DIM to sort along. B = SORT(A,DIRECTION) and B = SORT(A,DIM,DIRECTION) also specify the sort direction. DIRECTION must be: 'ascend' - (default) Sorts in ascending order. 'descend' - Sorts in descending order. B = SORT(A,...,'MissingPlacement',M) also specifies where to place the missing elements (NaN/NaT/<undefined>/<missing>) of A. M must be: 'auto' - (default) Places missing elements last for ascending sort and first for descending sort. 'first' - Places missing elements first. 'last' - Places missing elements last. B = SORT(A,...,'ComparisonMethod',C) specifies how to sort complex numbers. The comparison method C must be: 'auto' - (default) Sorts real numbers according to 'real', and complex numbers according to 'abs'. 'real' - Sorts according to REAL(A). Elements with equal real parts are then sorted by IMAG(A). 'abs' - Sorts according to ABS(A). Elements with equal magnitudes are then sorted by ANGLE(A). [B,I] = SORT(A,...) also returns a sort index I which specifies how the elements of A were rearranged to obtain the sorted output B: - If A is a vector, then B = A(I). - If A is an m-by-n matrix and DIM = 1, then for j = 1:n, B(:,j) = A(I(:,j),j); end The sort ordering is stable. Namely, when more than one element has the same value, the order of the equal elements is preserved in the sorted output B and the indices I relating to equal elements are ascending. Examples: % Sort a vector in ascending order sort([0 3 1 0 2 0 1 6]) % Sort each column or row of a matrix A = [3 7 5; 0 4 2] B1 = sort(A,1) % sort each column B2 = sort(A,2) % sort each row % Sort complex numbers according to their real part A = [1+1j ; 1-1j ; -2-2j ; 0 ; -2+2j] B = sort(A,'ComparisonMethod','real') See also ISSORTED, SORTROWS, MIN, MAX, MINK, MAXK. Documentation for sort doc sort Other uses of sort categorical/sort RandStream/sort codistributed/sort string/sort datetime/sort sym/sort duration/sort symbolic/sort fixedpoint/sort tabular/sort gpuArray/sort tall/sort parallel.internal.types.SettingsLevel/sort

Hassaan on 8 Mar 2024
k = 3;
randomNumbers = 1 + rand(1, k); % Generate k random numbers between 1 and 2
randomNumbersSorted = sort(randomNumbers); % Sort numbers from smallest to largest
1.1909 1.2096 1.4468
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