count specified letters

[LV-Flo]

Hello LabView-Community,
i have a question which is very easy for you i think.
i have a sequence in a string, for example "ACGTAA". Now i want just to now how many A´s, C´s, G´s and T´s are in it. In this case A=3, C=1, G=1, T=1. Yes, you have right, i´m really a beginner 😉
Do you know a VI for it or have a info for me?

Thanks, Bye
Flo

[BJD1613]

try using the match pattern function under the string palette. If you place this in a loop and search until the offset past match is -1 you will see how many iterations of the loop have executed and that will tell you how many letters you have. Hope this helps.

[LV-Flo]

Thank you very much for your fast answer,
i´ll try this.

Best regards,
Flo

[Jim_Cavera]

There's a simpler way to do it. Convert the string to a character array. Sort the array. Step through the array looking for changes (from one character to the next) and count the number of characters between the breaks. See the attached VI. Cheers.

- Jim Cavera

[LV-Flo]

Thanks, you are great!
I just have a little problem - don´t have LV 7...
But i will try it.

Thank you very much,
Cheers,
Flo

[Liz F]

Hello Flo and all,

This is a great little example program! Good documentation.

I saved it for LabVIEW 6.0 and later for your use.

Hope this helps!

Liz F
National Instruments

[Anonymous]

Hello Flo and all,

This is a great little example program! Good documentation.

I saved it for LabVIEW 6.0 and later for your use.

Hope this helps!

Liz F
National Instruments

[LV-Flo]

Hi and thanks, i had just a problem with opening the file. But it doesn´t metter, i´ll try it myself.
Thanks again.
Bye,
Flo

[LV-Flo]

Hi Liz F,
now it worked. Great!
Thank you very much!

Cheers,
Flo