Why is there no warning when trying to assign NaNs to a INT32 type array in MATLAB?

When attempting to assign NaN values to an INT32 datatype, MATLAB does not throw a warning. For example,

a=int32([0 0 1 1])

a(1:2)=NaN

Answer 1

[MathWorks Support Team]

NaN values can only be assigned to single or double data types. Assigning a NaN to an int32 value should throw a warning. By default this warning is turned off. To turn on this warning,please execute the following command in MATLAB:

warning on MATLAB:intConvertNaN

Now,when you try to assign NaN values to a Int32 array, you will receive a warning.

[Les Beckham]

Is this still supposed to work? This setting does not appear to work in 2020a. After executing the 'warning on' command shown above, the example in the 'question' still shows no warning, it just silently sets the values to zero like it used to do with that warning turned off.

I've had that 'warning on' command in my startup.m for years and it used to work.

After a couple years of not having access to Matlab at work due to a move to a different company, today I got tired of not having it and purchased a home license. I was surprised to see that this doesn't seem to be working anymore.

I had hoped, when this first came up years ago, that the default would change to having this warning turned on. Now it appears that it can no longer even be turned on manually.

Quoting the Accepted Answer: "Assigning a NaN to an int32 value should throw a warning." I still believe that to be true.

[Steven Lord]

The four integer warnings were removed in release R2010a, as indicated by this entry in the Release Notes.

[Les Beckham]

Thanks for the info, Steven. That's disappointing, though. I really don't agree with Matlab doing something other than what it is told without any warning.