_I am compiling several data points with Tgraph at x axis and y axis but meanwhile getting points at y axis with pow(10,-76). unable to set with y axis range command also. And also not fitted in log axis form. Here attaching Tgraph script and attaching png file
All the points are in fact plotted in your image --there are 5 points, just what you put into the graph; what is not fitting well is the curve joining the points. You can use a line instead of a smooth curve, i.e
gr1->Draw("AL*"); // instead of "AC*"
and/or change the minimum value of the y-axis:
gr1->SetMinimum(1e-50); // can be done before drawing gr1