_ROOT Version:Both 5 and 6

_Platform:Ubuntu 14-16-18

*Compiler:* Not Provided

Dear root experts,

I would like to make a polar graph which I don’t know if possible under root framework.

I just made a quick sketch of it and attached.

I will define histograms like

TGraphErrors* hist[4];

hist[i] = new TGraphErrors(16, x, y, ex, ey); for i=0,1

where double x[16]; and double y[16];

hist[j] = new TGraphErrors(8, x, y, ex, ey); for j=2,3

where double x[8]; and double y[8];

Polar graph will have 4 concentric circles and 16/8 division along the circle. Divisions will be labeled by numbers and not by angles.

I tried TGraphPolar instead of TGraphErrors, couldn’t do.

I tried TH2D and then fill x,y and then Draw->(“colzpol”) or Draw->(“pollego2z”)

I tried lots of other stuff too, all to no avail.

Is it possible to make a graph as shown in the sketch ? If possible, can you tell me how I can do it ? Just give me the recipe, I can do the rest.

Thanks