convert scientific string to number ?????

[david79]

Hello,

Could anybody tell me how I can convert a scientific string to a number ( for ex : String 7.4E-1 to 0.74 )  ? 

Any help would be great !

Regards,

David

[unclebump]

Try this. 7.0 format. This vi is located in the All functions, String, String/number conversion on the block diagram.

[david79]

Hi Unclebump,

Thanks for ur answer, it works fine.

cheers,

David

[andreevz]

Hi

I have the same problem here, but this example does not work.

The number I try to convert ifor example is 2.78242e-03, and the answer it gives me is 2

I tried to change the precision of the indicator to the 10th digid, and tried different format modes but it does not work.

Can somebody help??

I have another issue of the same kind. I am trying to convert a fractional number to string, but it does not work.

For example I input a DBL value 2, divide it by 1000. The result shown is 0,002. Then I try to convert this to a string and the answer is " 0, ".  What I need to get as a result when I convert it to string is "0.002"

I think I have some problems with those "," and "." dividing the fractions but I cannot figure it out. I also tried to change my windows setting to have a default value "." which is separating them but it does not work out. 

I am using MathLab 8.5

Please help.

Thank you for your responses.

[MikeS81]

Hi andreevz,

if i use the before attached example and insert you example number, it works fine for me. I work with a point as decimal seperator.

Mike

[andreevz]

Sorry for troubling guys.

A good old fashioned restart fixed the problem fine

[GerdW]

Hi andre,

you can override system settings using special format codes in string conversions!

To convert a string to number like your example "2.78242e-03" you should use "%.;%f" as format string for "scan from string".
The same format string "%.;%f" will give the desired result when using "Format into string" and a value of 0,002...

When changing system settings you have to restart LabView, not the whole (Windows) system...


Message Edited by GerdW on 04-02-2008 12:02 PM

[Mathan]

Hai andreevz,

I tried the same with the given example. Its perfectly working without any problem for your first query. The thing is if u give a comma "," then it will just return the numbers before the decimal point. Here in this case it will give 2. If u give a dot "." then it will return the full value. That is result will be 0.00278242

Next, how u convert that value to a string? could u post ur code? so we will work it out easily.

Thanks and Regards,

Mathan

[andreevz]

Thanks for all the responses people.

This forum is really great.

I already fixed the problem. I believe it was a problem with my regional settings, and when I change them and restarted LabView everything came in order. I am using the simplest functions you can find in LabView, such as convert string to fract/exp number, and convert fract number to string.

Thanks again. Later I will have more questions as I am building my first program by myself and up to now it is working almost fine 😉