check whether a number belongs to an array or not
2,766 次查看(过去 30 天)
显示 更早的评论
hi all, i want to check a number in the array.i have created an array and i want to know that a whether a perticular number belongs to the array or not. is there any inbuild function for "belongs to" in matlab. can anybody help me?
0 个评论
采纳的回答
Walter Roberson
2011-12-28
ismember()
Note: if you are not using purely whole numbers, then please read http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F
5 个评论
Walter Roberson
2018-3-30
Note: later versions of MATLAB added ismembertol() for dealing with floating point numbers.
更多回答(1 个)
Jan
2011-12-28
A = floor(rand(100, 100) * 1000);
contains5 = any(A(:) == 5);
If the array is large and the searched element is found early, Matlab wastes a lot of time by searching the rest of the array. Then this C-Mex is faster: FEX: anyEq.
4 个评论
James Tursa
2018-3-30
- Download the code from the provided link
- Compile the code at the command line:
mex anyEq.c -largeArrayDims
- Use the function like any other function. For help on syntax,
help anyEq
另请参阅
类别
Find more on Loops and Conditional Statements in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!