Its 1st one: colormapped image with out contour lines.
I have three column data x y z separated by space (please see the attached image).
y column increases in 0.5 steps (15 to 60) while for each y I have x (from -2 to 2) in step 0.02.
z column is the intensity for each (x,y) point.
It can be imagined as a matrix as 2-dimensional (x,y) space where we assign z as intensity on each (x,y).
I would like to plot all the (x,y) points in 2-dimension [x-coordinate, y-coordinate] and we will assign the corresponding z-values (intensity) as color.
I guess it can be done using other software but I like and feel Bokeh has its own fascinating way to plot and use fantastic colors