Using ROOT and LXPLUS

Newbie
1

Hello! I am trying to use root with LXPLUS virtual machine and I am having troubles with it.
I’ve made a program that creates a graph using data from .csv file. The problem is I can’t see the graph using this machine. Is it even possible?

The next problem is with “fit” functions. I tried using them on my PC root and they worked well, but I get problems on the machine. Like this:

Warning in : Abnormal termination of minimization.
FCN=4.19015e+06 FROM MIGRAD STATUS=FAILED 104 CALLS 105 TOTAL
EDM=40888.5 STRATEGY= 1 ERR MATRIX APPROXIMATE
EXT PARAMETER APPROXIMATE STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 p0 6.90297e-02 8.33158e-04 0.00000e+00 -4.85404e+05
2 p1 8.00000e+00 1.93352e+07 0.00000e+00 1.18376e-12
FCN=1.21367 FROM MIGRAD STATUS=CONVERGED 122 CALLS 123 TOTAL
EDM=9.5269e-08 STRATEGY= 1 ERROR MATRIX ACCURATE
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 p0 1.23863e+00 1.27093e-01 9.12131e-05 -2.40140e-03
2 p1 7.42646e+00 8.31739e-02 5.98429e-05 3.27141e-03

ROOT Version: Not Provided
Platform: LXPLUS
Compiler: Not Provided

2

How do you log onto lxplus, what do you connect from (Linux / macOS / Windows)?

There’s an issue with the fit, that’s probably unrelated.

Can you open any graphics from lxplus, like on the terminal: xterm?

3

I am logging onto LXPLUS from Windows PC via cmd.
I typed xterm and got this:
xterm: Xt error: Can’t open display:
xterm: DISPLAY is not set

What did You mean about the “fit”?
Thanks for response

4

Try using “mobaxterm” to log into lxplus, it comes directly with graphic support so that you will see the graphs.

5

Or the open source Xming or VcXsrv.

…or just use WSL2 - that’s probably the easiest way.

This: