How create basic test

[Bury]

Hey, I'm newbe in LabView. How can I create basic test. Where I upload a file with questions. There are 300 questions. The program has to draw 10 random questions from the file and show them. At the moment I know how to load a file and show all questions in array. He added my file. Does anyone know how to do it? Thank you in advance for your help.

[GerdW]

Hi bury,

load all items, then select 10 of them in a loop.

To select random items you may create a ramp from 0 to (size of array -1), then apply Shuffle function, then just take the first 10 entries of the shuffled ramp as indices for your items...

[Bury]

Yes, I know how do it with hardcode data. But how do it with file data. Could you see the txt file and perform this task?

First I must upload data from file to array. What do I have to do in the next step? 

[GerdW]

Hi bury,

load the file using ReadText as an array of lines. Then do as written before...

[GerdW · Accepted solution]

Hi bury,

using LV2018 you can even apply Shuffle on your string array of items, so no need for an additional loop as I described before:

[Bury]

Wow, I will try this and let you know

[altenbach]

---

@Bury wrote:

How can I create basic test.

---

You would connect a pH electrode and see if the reading is >7. 😮

[Bury]

I will try this but I can't connect function. And why array subset isn't string format?

[RavensFan]

Your question is unclear.  The VI you posted doesn't show you trying to connect any function and failing.  Nor does it show the Array Subset function.

I would recommend looking at the online LabVIEW tutorials
LabVIEW Introduction Course - Three Hours
LabVIEW Introduction Course - Six Hours

[mcduff]

Try this. And next, start your homework earlier. Create the VI yourself, you will learn something even if you just copy it exactly.

mcduff