Number of colors in scatter-plot

ROOT
1

Dear All,

I am drawing a color-coded scatter plot using three branches from a TTree (one branch for x-axis, one for y-axis, and one used to color code the markers). I am doing following commands:

gStyle->SetPalette(54);
gStyle->SetNumberContours(100);
tree->SetMarkerStyle(20);
tree->SetMarkerSize(0.8);

c->cd();
tree->Draw("y1:temperature:t","","colz");

This draws the following plot.

test.pdf (52.2 KB)

It looks fairly fine but my problem is that root uses only a couple of colors from the palette to color-code the markers. Is it possible to achieve a higher amount of colors in the scatter plot and hence a smoother transition between the markers?

Thanks.

2

What do you get if you try:
tree->Draw(“t”);

3

Hi Pepe,

this is what I get. It is a distribution of times, which is fairly uniform (except for a few gaps).

test2.pdf (14.2 KB)

4

What is your Palette ? you should use one with a larger number of colors.

5

Palette 54, which is used (as can be seen in the original post), has 255 colours.

Try to make your “dots” smaller and maybe then you will see it better.

6

I had a closer look at you plot I do not think that’s true… all colors are used