- Syntax error because =< is not a MATLAB operator, and needs to be replaced with <=.
- The if operator "An expression is true when its result is nonempty and contains only nonzero elements (logical or real numeric). Otherwise, the expression is false." This means that your logical matrices must contain only true to execute the following statements. This will be a rare occurrence for that random matrix.
- The syntax else a > 0.2 is not an error, but serves no functional purpose as it simply displays the logical array a > 0.2. The correct operator would be elseif.
- The allocations a = 0 and a = 1 do not replace the zero elements, but simply reallocate the entire variable. This is not what the question requested.
- There is no looping or indexing to select which elements are being replaced.
How do I write a script that creates an M x N array of random numbers?
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So I need to write a script that creates an M X N array of random numbers. Move through the array, element-by-element, and set any value that is less than 0.2 to 0, and any value that is greater than (or equal to) 0.2 to 1.
3 Comments
Stephen23
on 6 Aug 2020
Original question by Drew Closner on 14th December 2016 retrieved from Google Cache:
"How do I write a script that creates an M x N array of random numbers?"
So I need to write a script that creates an M X N array of random numbers. Move through the array, element-by-element, and set any value that is less than 0.2 to 0, and any value that is greater than (or equal to) 0.2 to 1.
Original comment by Drew Closner on 14th December 2016 retrieved from Google Cache:
I figured it out!
Here is the answer if anyone needs it:
a = rand (4,5)
if a =< 0.2
a = 0
else a > 0.2
a = 1
end
Answers (2)
Andrei Bobrov
on 14 Dec 2016
just
a = rand(M,N) > .2;
1 Comment
Image Analyst
on 25 Dec 2016
Depends on if "element-by-element" wanted a "for loop" solution or a vectorized solution.
If it's a homework solution I'd hope the professor would accept either way since the problem statement was so ambiguous.
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