matlab,math , Matlab programming output error


Matlab programming output error

Question:

Tag: matlab,math

I have been trying to solve below matlab programming question. I have tried my code, but it could not work for some cases.

Am I missing something?

Question:

Write a function called integerize that takes as its input a matrix A of non-negative integers of type double, and returns the name of the “smallest” unsigned integer class to which A can be accurately converted. If no such class exists, the string 'NONE' is returned. For example, if the largest integer A is 14, then the function would return 'uint8', but if the largest integer in A is 1e20, then the function would return 'NONE'.

Code:

function integ=integerize(A)
integ = 'none'; 
maxValue=max(A(:));
disp(maxValue);
if maxValue <= intmax('uint8')
    integ='uint8';
elseif maxValue<=intmax('uint16')
    integ='uint16';
elseif maxValue <= intmax('uint32')
    integ='uint32'; 
elseif maxValue <= intmax('uint64')
    integ='uint64';
elseif mod(maxValue,1) ~= 0
    integ='NONE';
end
end

Output:

Feedback: Your function performed correctly for argument(s) 0
Feedback: Your function performed correctly for argument(s) 214
Feedback: Your function performed correctly for argument(s) 255
Feedback: Your function performed correctly for argument(s) 256
Feedback: Your function performed correctly for argument(s) [80 380 468 413 51 549 971 245 39 376 65535]
Feedback: Your function performed correctly for argument(s) 65536
Feedback: Your function performed correctly for argument(s) 4294967295
Feedback: Your function performed correctly for argument(s) 4294967296
Feedback: Your function made an error for argument(s) 1.84467440737096e+19

Your solution is _not_ correct.

Answer:

Why not simply initializing integ to 'NONE' and remove the last test case?

function integ=integerize(A)
integ = 'NONE'; 
maxValue=max(A(:));
disp(maxValue);
if maxValue <= intmax('uint8')
    integ='uint8';
elseif maxValue<=intmax('uint16')
    integ='uint16';
elseif maxValue <= intmax('uint32')
    integ='uint32'; 
elseif maxValue <= intmax('uint64')
    integ='uint64';
end
end

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