How to generate correlated random number?

ROOT
1

Dear Experts,
I want to generate random number with three variables with correlation taken into account.
I followed one example from here here and used the GaussianND function to generate
events.

But somehow I am getting following error.
I have attached the code also.
multivarGaus.C (874 Bytes)

Could you please let me know a solution for this.

error: no member named ‘GaussianND’ in ‘ROOT::Math::GSLRandomEngine’

  • rnd.GaussianND(dim, pars, cov, genpars);*

Thanks and Regards
Souvik

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ROOT Version: Not Provided
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2

You need at least ROOT 6.26.

3

Thanks for you reply.
Is there anyway I can set up for 6.26 without installing it ?

Thanks.

4

After doing this: source /cvmfs/sft.cern.ch/lcg/app/releases/ROOT/6.26.00/x86_64-centos7-gcc48-opt/bin/thisroot.sh

I am getting error like this after root -l:
root: /lib64/libstdc++.so.6: version CXXABI_1.3.8' not found (required by root) root: /lib64/libstdc++.so.6: version GLIBCXX_3.4.21’ not found (required by root)

5

On which machine are you working?

6

It’s working fine now.

Thanks.

7

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