Change cell numeric attributes can have strange default values

These values seem a little surprising... I did not type the me... Happens if you change the type of data we'll say from unsigned char to double...

But this isn't some meaningless: If you now - enter as a new minimum value 1e1000, CVI "corrects" it to-9.2e + 18...

Also, it can behave correctly, sometimes, but shouldn't it always?

It behaves better if instead of - 1e1000 first type you-100. If you enter then - 1e1000 it will correct the number - 1.0E + 300

(Well, it should probably be E + 308...) but I better stop here

Hi Wolfgang,.

When I first open the Edit dialog box, data of the cell type is int64 and the range is (-9223372036854775808, 9223372036854775807). Those who are be the greatest values possible int64 can accommodate, and they are probably there because they were forced to the bottom of the default double range (-Inf + Inf), in a previous editing session.

You then replaced the char data type, which replaces the beach (-128,127), which represents the beach under the constraint of a tank. But the dialogue box remembers your original preference was - 9223372036854775808 (9223372036854775807) and so, when you change the data type double in the same editing session, it restores this range once again, since it is now valid for the new data type. Except that it displays in scientific notation, since the double will automatically use this notation when the Exhibitor exceeds a certain size.

It seems that you tried then to compel this return to the widest possible range of a double tapping 1e1000. It is a reasonable assumption on your part, but unfortunately this is a limitation of the CVI that it cannot compel a double entered into scientific notation ‑‑ does not recognize 1e1000 as valid a number. He keeps, so any value has been previously in control. If you had typed 1e308 instead, it would have worked, since it is a valid number. I agree that it is very inconvenient for you to "guess" what might be the maximum number, so that you can enter. All I can say is that if you really want to enter the largest possible value of double in the max/min controls, you need to enter '-Inf ' and '+ Inf' instead.

Luis

Given what I wrote above, should not happen the following (and I was not able to reproduce it): "it behaves better if instead of - 1e1000 first type you-100.. If you enter then - 1e1000 it will correct the number - 1.0E + 300 ". He should leave-100 in the control.

Tags: NI Software

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