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 Help a noob loop in LabTalk		  New Topic  Reply to Topic
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phike

Germany
2 Posts
Posted - 01/27/2023 :  10:34:51 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
OriginPro 2019b
9.6.5.169
Win10

Hey guys,
I'm an absolute LabTalk newcomer and got stuck on a simple sounding issue:

I need to simulate some data.
Here I got a random number generator, that gives me data which I feed into my calculations.
Now I want to repeat this process of "Take Seed from B[i]" -> "Do calculation" -> "Take result and write it into a fiel X[i]"

The issue I face is that in order to do my full calculation, I need the script to actually fill the calculation-coloums fully before I can proceed to the next seed (I need to sum up a specific number of rows).

I attached a small sample.
https://my.originlab.com/ftp/forum_and_kbase/Images/Help-Loop.opju

Hopefully someone can help me.

Thanks in advance and greetings,
Philip

YimingChen

1651 Posts
Posted - 01/30/2023 :  09:46:37 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
The seed to the rnd() has to be integer, see the page below:
https://www.originlab.com/doc/OriginC/ref/rnd

You may define a LabTalk function that takes the seed value as input. See below:




function double cal(int seed) {
  if (rnd(seed)==0) {
   	Dataset ds1 = {rnd(), rnd(), rnd(), rnd(), rnd()};
	Dataset ds2 = {rnd(), rnd(), rnd(), rnd(), rnd()};
	Dataset sum = ds1 + ds2;
	ds1 = ds1 / sum;
	ds2 = ds2 / sum;
	Dataset res = sum((ds1 - ds2)^2);
    return res[5];
  }
  return -1;
}


James
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phike

Germany
2 Posts
Posted - 02/07/2023 :  11:32:21 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Awesome ! Thank you a lot, James :)


quote:
Originally posted by YimingChen

The seed to the rnd() has to be integer, see the page below:
https://www.originlab.com/doc/OriginC/ref/rnd

You may define a LabTalk function that takes the seed value as input. See below:




function double cal(int seed) {
  if (rnd(seed)==0) {
   	Dataset ds1 = {rnd(), rnd(), rnd(), rnd(), rnd()};
	Dataset ds2 = {rnd(), rnd(), rnd(), rnd(), rnd()};
	Dataset sum = ds1 + ds2;
	ds1 = ds1 / sum;
	ds2 = ds2 / sum;
	Dataset res = sum((ds1 - ds2)^2);
    return res[5];
  }
  return -1;
}


James
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