command "compute rdf"

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1

here is the command

compute myRDF all rdf 200 1 2 1 1 2 2
fix 9 all ave/time 10000 500 5000000 c_myRDF[] file tmp1.rdf mode vector
fix 10 all ave/time 5000000 1 5000000 c_myRDF[] file tmp2.rdf mode vector
fix 11 all ave/time 10000 1 10000 c_myRDF[*] file tmp3.rdf ave window 500 mode vector

but the output is nothing , i mean that no data is contained in the file.

like this:

Time-averaged data for fix 9

TimeStep Number-of-rows

Row c_myRDF[1] c_myRDF[2] c_myRDF[3] c_myRDF[4] c_myRDF[5] c_myRDF[6] c_myRDF[7]

And that is all.

i dont understand.

2

here is the command

compute myRDF all rdf 200 1 2 1 1 2 2
fix 9 all ave/time 10000 500 5000000 c_myRDF[*] file tmp1.rdf mode vector
fix 10 all ave/time 5000000 1 5000000 c_myRDF[*] file tmp2.rdf mode vector
fix 11 all ave/time 10000 1 10000 c_myRDF[*] file tmp3.rdf ave window 500 mode vector

but the output is nothing , i mean that no data is contained in the file.

that has nothing to do with compute rdf, but with the Nevery, Nrepeat,
Nfreq settings, which in turn depend on the number of MD steps you are
running.
have you run 5000000 MD steps?

axel.