> Try the plaxes() call (see 
> http://plplot.sourceforge.net/docbook-manual/plplot-html-5.12.0/plaxes.html) 
> to get the tick marks that you want.  I would try to fix your code, but I 
> don’t have a build
> environment setup with the new Fortran bindings—sorry.

Hello, I was trying this but I do not understand how it works.

Would you write any small example with my data as example? The RMS error in 
'rms' variable was put.  
It not must be done with new fortran. It can be in an old, I change then to my 
needs. 

I was trying with these below, but nothing changed on generated plot:
call plaxes(0d0, 0d0, "lbcnst", 0d0, 0, "lbcnstv", 0.01d0, 10)
call plaxes(0d0, 0d0, "lbcnst", 0d0, 0, "lbcnstv", 0.0001d0, 1000)
call plaxes(0d0, 0d0, "lbcnst", 0d0, 0, "lbcnstv", 10.0d0, 1000)
call plaxes(0d0, 0d0, "lbcnst", 0d0, 0, "lbcnstv", 10000.0d0, 3)

I do not understand these parameters:
ytick (PLFLT, input)
    World coordinate interval between major ticks on the y axis. If it is set 
to zero, 
    PLplot automatically generates a suitable tick interval. 
nysub (PLINT, input)
    Number of subintervals between major y axis ticks for minor ticks. If it is 
set to zero, 
    PLplot automatically generates a suitable minor tick interval. 

Would you like or someone on the list explain by very, very simple example how 
these parameters works, i.e. 
how I can calculate it? For example I need 5 major ticks on the y axis as in 
the file "test_matlab.pdf".

In general it not must be in log scale, simply how these should be calculated 
to get for example "n" major 
ticks on given axis?

Thank you in advance.

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