Inserting logo or image

ROOT
#1

Dear Rootusers,

I want to insert a image or logo in my plots (canvas) by using in macros .
Could anyone please help me to know how to do it ?

Thank you,
Regards

Nihar

How to draw curved arrow easily
#2

Look at the examples in $ROOTSYS/root/tutorials/image/

#3

Hi,

Now i can insert it on my plotting canvas now.
I want to keep this logo at the top right or left of my plot.
Could you please help me what function or syntax i use to do it ?

Thank you.

#4

You should plot it each time you draw a picture.
The best is to make a small macro which does the plot and then add the logo, like that you have only one command to type.

#5

Hi,

Sorry…i am not getting your point.

As per your suggestions
i use

root -l 'XXXXX.C’
root [0]
Processing XXXXX.C…
root [1] TImage *img = TImage::Open(“yyy.jpg”);
root [2] img->Draw();

(is it the way your are suggesting ?)

But when i follow this, then whole logo is filled on the canvas and no plots are visible.
And i can’t resize it to put it on the top right or left.

Please, suggest .

Thank you.

#6

I mean that you should embed in a macro the logo drawing and the histogram drawing to simplify the typing.
Can you send a small example showing what your are doing ?

Embed a picture inside a canvas
#7

Hi,

Here is my small macro

please, suggest.

void plot_image()
{

  TImage *img = TImage::Open("image.jpg");

  if (!img) {
    printf("Could not create an image... exit\n");
    return;
  }

  
  TCanvas *c6 = new TCanvas("c6", "S*#sigma",320,22,691,653);
  gStyle->SetOptStat(0);
  c6->Range(-0.3373713,-2.125,3.036341,9.125);
  c6->SetFillColor(0);
  c6->SetBorderMode(0);
  c6->SetBorderSize(2);
  c6->SetLogx();
  c6->SetFrameBorderMode(0);
  c6->SetFrameBorderMode(0);
     
  Float_t Y[4]={4.6,2.1,3.9,1.0  }; 
  Float_t X[4]={150.,26.,9.8,6.6};
  Float_t Yerr[4]={0.24,0.746,0.5809,1.29};
  Float_t Xerr[4]={0.0};
  
  TGraphErrors *hm3sta = new TGraphErrors(4,X,Y,Xerr,Yerr);
  gStyle -> SetCanvasBorderMode(0);
  gROOT->SetStyle("Plain");
  gStyle->SetOptStat(0);
  
  TH2F *h2 = new TH2F("npart_ave","",1000,0.,1000.,900,-1.,8.);
  npart_ave->GetXaxis()->SetMoreLogLabels();
  npart_ave->GetXaxis()->SetNdivisions(-503);
  npart_ave->GetXaxis()->SetTitleOffset(1.1);
  npart_ave->GetYaxis()->CenterTitle(true);
  npart_ave->GetYaxis()->SetNdivisions(40603);
  
  h2->GetXaxis()->SetTitle("X-axis");
  h2->GetYaxis()->SetTitle("Y-axis");
  h2->GetXaxis()->SetTitleOffset(1.1);
  h2->GetYaxis()->SetTitleOffset(1.2);
  h2->Draw();
  
  hm3sta->SetMarkerStyle(25);
  hm3sta->SetMarkerColor(2);
  hm3sta->SetLineColor(6);
  hm3sta->SetMarkerSize(2.0);
  hm3sta->Draw("P");
  //img->SetConstRatio(0);
  //img->SetImageQuality(TAttImage::kImgBest);
   img->Draw();
 //img->SetEditable(kTRUE);
   c6->Modified();
   c6->cd();
   c6->SetSelected(c6);
}

Thank you.

#8

See the attached files.


logo.C (1.45 KB)

#9

Hi,

yes, it works now.

But how do i set the position of the logo pad on my plotting pad ?
just as our own desire place …because it can’t be dragged to desired place .
should i randomly choose the values in the TPad constructor for its position ?

Please, suggest.

Thank you .

#10

Look at the macro drawing the logo, it creates a pad. This pad defines the logo position and size in normalized coordinates.