topic Re: remove spaces from string in LabVIEW

remove spaces from string

hiNI — Mon, 11 Feb 2008 16:43:25 GMT

Hello,

I have a string in the following format:

01 04 81 04 91 04 14 32

I would like to remove the spaces such that the resultant string would be:

0104 8104 9104 1432

Can you please help me accomplish this.

Thanks,

hiNi

Re: remove spaces from string

MikeS81 — Mon, 11 Feb 2008 16:50:46 GMT

Hi hiNi

you can transform your data to Byte array and run through a for loop. See the attachemt for an example.

Mike

Re: remove spaces from string

GerdW — Mon, 11 Feb 2008 16:53:03 GMT

Hi hiNI,

make a loop, feed the string to a shift register, in the loop you delete the ~~(i*i4+1)th character until (i*4+1)>length_of_string~~...
arghh-the math needs some tweaks and I have to leave

Message Edited by GerdW on 02-11-2008 05:53 PM

Re: remove spaces from string

altenbach — Mon, 11 Feb 2008 16:51:09 GMT

Sooo... it seems you only want to remove the odd numbered spaces. right?

To remove all spaces, just do a global replace using "search and replace string" and replace "space" with and empty string. 😉

Re: remove spaces from string

rpursley8 — Mon, 11 Feb 2008 18:16:24 GMT

Try this. It converts the string to a byte array and then decimate and interleave array functions are used to remove every other space.

Re: remove spaces from string

hiNI — Mon, 11 Feb 2008 18:35:36 GMT

THANK YOU all for your recommendations. You have solved my dilema!!!

Sincerely,

hiNi.

Re: remove spaces from string

hiNI — Wed, 13 Feb 2008 15:38:35 GMT

Hello MikeS81,

When I tried to put in a longer string:

01 04 81 04 91 04 14 32 00 00 02 3F 20 00 00 00 2D FF A0 00 10 00 04 00 00 17 07 30 07 75 01 A1 07 93 00 10 1F CE 01 F9 1C 95 01 A4 00 0D 1F F2 00 1D 3E 67 04 40 3B BA 01 A5 3F E0 69 20 00 00 26 22 00 00 DA 9A 2D FD D2 82 26 22 8E CC C8 00 00 B6 3D 68 3F 3B 60 3C AE 12 24 02 3B 00 00 00 2A 28 00 80 00 04 3A FF 01 3C 40 C8 24 92 14 21 00 03 F0 00 08 64 04 0A 00 79 01 00 00 00 00 00 00 F4 00 00

After I ran your Unbenannt 5.vi, this was the output that I got:

0104 8104 9104 1432 0000 0232 0000 0002 0001 0000 4000 0170 7300 7750 1107 9300 1010 1919 5014 0001 2001 3670 4403 0153 0692 0000 0262 2000 0922 8226 2288 0000 6368 3360 3122 4023 0000 0022 8008 0000 4301 3408 2492 1421 0003 0000 8640 4000 7901 0000 0000 0000 4000 0

As you can see, the last word does not correspond to the original word of F4 00. I looked at your code, however, I can't seem to be able to fix it. Do you have a quick solution to this problem.

Thanks,

hiNi.

Re: remove spaces from string

MikeS81 — Wed, 13 Feb 2008 15:47:58 GMT

Hi hiNi,

i change it for you. The only thing to change was the A..F ASCII Code in the Case structure.

Mike

Re: remove spaces from string

hiNI — Wed, 13 Feb 2008 15:56:19 GMT

THANK YOU!

Re: remove spaces from string

altenbach — Wed, 13 Feb 2008 17:41:11 GMT

If you don't want to deal with complicated loops, shift registers, built arrays, and case structures, here's a loop-free version.

If your array ends in some odd character count, you might need to tweak the result slightly by trimming. Basically, you would calculate the exact final string lenght and use it for the second reshape operation instead of using the product calculation.

Modify as needed. 🙂

Message Edited by altenbach on 02-13-2008 09:41 AM

Re: remove spaces from string

lmtis — Wed, 13 Feb 2008 18:10:24 GMT

Altenbach,

47 minutes? You must eat lunch at 11:00 Very nice solution.

*****

Message Edited by lmtis on 02-13-2008 12:10 PM

Re: remove spaces from string

hiNI — Wed, 13 Feb 2008 22:33:22 GMT

THANK YOU!!!!

Re: remove spaces from string

DonRoth — Wed, 21 Jan 2009 20:28:48 GMT

The attached is straightforward way to get rid of all spaces in a string.....Don

Re: remove spaces from string

altenbach — Wed, 21 Jan 2009 23:19:36 GMT

Using "delete from array" in a loop could get expensive with large inputs because the array in the shift register requires a new allocation in memory for each space found. I would not recommend that. Try to find an "in-place" solution. 🙂

Alternatively, just do the following... 😮

Message Edited by altenbach on 01-21-2009 03:19 PM

Re: remove spaces from string

DonRoth — Thu, 22 Jan 2009 16:06:44 GMT

I actually tried this earlier but I tried to use a string constant with a space in it as the string to replace instead of using the space constant.

Now I now (or know again) about the space constant.

Indeed this is a better solution.

Thanks,

Don

Re: remove spaces from string

altenbach — Thu, 22 Jan 2009 16:19:36 GMT

DonRoth wrote:
I actually tried this earlier but I tried to use a string constant with a space in it as the string to replace instead of using the space constant.

That should work equally well, though. 🙂

Re: remove spaces from string

DonRoth — Thu, 22 Jan 2009 16:37:45 GMT

Actually you are right, I think I used the string constant without putting a space in it!

Message Edited by DonRoth on 01-22-2009 10:37 AM

Re: remove spaces from string

altenbach — Thu, 22 Jan 2009 16:46:01 GMT

Yes, that's probably one of the more confusing behaviors: An empty string constant gets shorter (horizontally) when you type a "space" in it using a proportional font. 😉

I would typically set the display to \-codes to make it more readable.

Re: remove spaces from string

DonRoth — Thu, 22 Jan 2009 16:52:36 GMT

Had I set to 'codes display', I would have discovered my mistake so that is always a good check when dealing with delimiters and such.