The trouble with most LaTeX documentations is that they're extremely heavy, and their examples are too often "out of this world". I'm having difficulties in finding the proper setup to add a linear regression line, and to customize the markers, and the tick numbers. Here's a MWE to work with :
Here's a preview, with a few things shown in red that I want to add in the plot :
1. How to modify the code above to add a linear regression line, with options for its style (color and thickness)?
2. How to show its equation (with many digits)? and to change its "X" and "Y" symbols? (so the equation is using exactly the same symbols as on the axis).
3. How to add more digits to the tick label numbers, on the two axis? Writing 0.0, 1.0, ... in the code do nothing.
4. How to change the marker's color, and the error bars color separately? For example the markers in blue, and all the error bars in red?