Missing values ​​occur after converting data type.

Problem :

From the figure above, I calculated by using data type as double.

And when I convert the data type from double to uint16, the value before and after data type conversion block are not same even if there is no process.

Questions :

Can you explain the reason and solution for this problem?

[Mehmed Saad]

integer rounding mode Floor, i guess

you value might be 4-eps

change it to round (i dont know if that's an option but i think it should be)

[Phannakarn Saingthong]

If changing the integer rounding mode to "round", it can solve the problem.

But I would like to know why is the value missing when passing the data type conversion?

[Mehmed Saad]

your value might be a bit smaller than 4 and it's not showing it because of the format

for example, type following in cmd

4 - 1e-15

ans =

4.0000

Now type

format long
4- 1e-15

ans =

3.999999999999999

floor(ans)

ans =

3

[Phannakarn Saingthong]

Example above

I tried to convert the data type from double to single before converting to uint16. It can solve the problem.

I think the root cause is the conversion of data types by converting from large data types (double) to small data types (uint16). there is a chance that the value will missing from the conversion.