MATLAB: Function handle uint64 bug

function handleuint64

In R2014a I find,

uint64(2025027714713048816)         %no problem, returns input
@(x) uint64(2025027714713048816)    %complains about Unexpected MATLAB expression
@(x) uint64(20250277147130)         %works

The implication would be that you cannot create a function handle that uses a uint64 constant that is larger than 2^53-1 .

Could someone check this in later versions?

Best Answer

This appears to be fixed in R2016a

Related Solutions

MATLAB: Uint64() losts its mind

Please see http://www.mathworks.com/matlabcentral/answers/39474-scalar-multiplication and expand the comments in the answer there to see a discussion.

MATLAB: Write a function called integerize that takes as its input a matrix A of integers of type double, and returns the name of the “smallest” signed integer class to which A can be converted without loss of information.

A simpler implementation:

function text = integerize(A)
if A >= intmin('int8') & A <= intmax('int8')
    typ = 'int8';
elseif A >= intmin('int16') & A <= intmax('int16')
    typ = 'int16';
elseif A >= intmin('int32') & A <= intmax('int32')
    typ = 'int32';
elseif A >= intmin('int64') & A <= intmax('int64')
    typ = 'int64';
else
    typ = 'NONE';
end
end

And tested:

>> A = [128,127;-127,0];
>> integerize(A)
ans = int16

int16 is correct because 128 cannot be encoded by int8, but can be by int16 or larger:

>> intmax('int8')
ans = 127

Best Answer

Related Solutions

MATLAB: Uint64() losts its mind

MATLAB: Write a function called integerize that takes as its input a matrix A of integers of type double, and returns the name of the “smallest” signed integer class to which A can be converted without loss of information.

Related Question