Variable bin size for logged scale

Newbie
1

Hello,
I’m trying to reproduce some model data (blue line), but am having problems with my bin size. the majority of my data is at the farther end of the x-axis but I want to plot more data points at the lower scale.

31

When I increase the bin size I observe these extra points in the lower x vales but get too many points at higher x-values. Is there a way of plotting using smaller bin sizes at lower at the x-axis.
The decleration of my TProfile looks like

TProfile* prof = new TProfile(“prof”, “prof”, 14, 1., 140 );

I also notice that despite declaring 14 bins I only observe 9 plotted points - is there a reason for this?

Thanks for nay help,
Alex.

2

Your histogram can have “variable bin size”:

{
  Double_t x[] = {1., 2., 3., 4., 6., 8., 12., 18., 25., 35., 45., 60., 90., 140.};
  TProfile *prof = new TProfile("prof", "prof", (sizeof(x) / sizeof(Double_t) - 1), x);
}
3

Hi Wile_E_Coyote,

I came across this earlier but was unsure on how I use this to set smaller bin sized at lower the lower x-range. There are multiple options for variable bin size and I’m not sure how they differ.

Thanks.

EDIT: I noticed your edit, thankyou for the clarification :slight_smile: