Problem about proximity in matlab

Hi, all,

I defined an array like S=ones(N,x,'uint32'). And I give values to all of them. However I find out the maximum value is 65535 which is 2^16 not 2^32.

I tried 'uint64' but the limit is still 65535, why is that?

Thanks.

[Walter Roberson]

How are you assigning the values?

>> S = ones(1,1,'uint32')

S =

             1

>> S(1) = 99999

S =

         99999

>> S(1)

ans =

         99999

>> class(S)

ans =

uint32

[C Zeng]

Oh, it is weird here. Let me try again.

[C Zeng]

Oh, when I use class, it is converted to uint16. I need to figure out why?

However I only define uint32 at the beginning. So what could be a reason for converting to uint16? I am confused.

[Image Analyst]

Calling class() causes no conversion. It must have got converted some other way.

Answer 1

[Image Analyst]

Somewhere along the way, you must have converted it to uint16, perhaps without realizing that you did so.

[C Zeng]

I use another value calculate from other function. But I did not convert it, traditionally if I do not convert what is the data type?

[Walter Roberson]

double

[C Zeng]

Thanks, Walter. I think it somewhere convert to double, however, double is more than uint32, right? Does it matter?

[C Zeng]

Now, I shut all programs off and restart it, seems that there is no such convert data type problems.