Regular Expression

[skh]

Hello Dear;

Could u help me out on the following problem?

I have a string like:

Roll: -3.345 Pitch:54.90 Yaw:-120.01

I want to receive just numbers from this string. The length of numbers are different; sometimes positive and sometimes negetive either float or integer numbers.

What I got from my code is very clumsy, could you correct me?

I attached the necessary part of code, that is worked for this string:

Result: -3.345,54.90,-120.01

If you have any suggestion, what will work instead of [*,], please let me know.

Thanks;

[Gak]

Try this.

[G_K]

Hi

Try using scan from string with the below format string

%[a-z,:,A-Z]%f%[a-z,:,A-Z, ]%f%[a-z,:,A-Z, ]%f

also see the attched image..

[ben64]

Gak solution is very good if you need the values in numeric format but you will need to convert them if you want the values in string format. You can use the following regex to get the values directly in string format.

Ben

[SBk]

Thanks all for reply.

It doesn't work. Let me send you my complete program.

The data continuosly comes from the serial port. After I filter the numbers, I will send them ona file.

I attached my previos work which works now. And the new veersion which I am looking for, this version is based on helpof you guys.(Thanks).

Best;

[SBk]

Ben,

I tried your regexp too, the output was empty.

[ben64]

---

@skh wrote:

I have a string like:

Roll: -3.345 Pitch:54.90 Yaw:-120.01

---

Is this the exact string that you receive or just something close? There is a blank space between Roll: and the following number but not for pitch and yaw. Can you post the content of the read buffer output of the VISA Read function? (connect a string indicator to this outpu)

You can also try the following regex:  \s*Roll:\s*([-\d\.]+)\s*Pitch:\s*([-\d\.]+)\s*Yaw:\s*([-\d\.]+)

Ben

[SBk]

Thanks Ben;

The second expression worked great:).

s* before the Roll, Pitch , Yaw means a string?

Cheers;

[ben64]

\s Matches any white space character (space, newline, tab, carriage return) and the star * is a special character that marks part of a pattern that can repeat zero or more times. So \s* will match zero or more white space character.

Ben