confplot

Extending ERRORBAR, it plots a line within a shaded area, as 'continuous' confidence/error bounds.

Description

CONFPLOT is a linear plot utility, extending ERRORBAR to represent continuous confidence/error boundaries as a shaded gray area around the plotted line (i.e. taking advantage of the command 'area').

CONFPLOT(X,Y,L,U) plots the graph of vector X vs. vector Y with 'continuous' confidence/error boundaries specified by the vectors L and U. L and U contain the lower and upper error ranges for each point in Y. The vectors X,Y,L and U must all be the same length.

• Acknowledgements: This submission has inspired the following:; errorfill, confplot_t, boundedline: line plots with shaded error/confidence intervals
• MATLAB release: MATLAB 6.0 (R12)

[Ajit Chaudhari]

A nice starting point to figure out how to make the error plots I want

[Stefano Fusi]

Very useful. I'm not sure it works in a log scale.

[Alberto Redondas]

Very useful but dont work if you have NaN on the error variables.

[Sergio Vallina]

confplot.m seems ok in the "default mode" (without defining color and linestyle) but has a bug if we try:

    For example,
       x = 1:0.1:10;
       y = sin(x);
       e = std(y)*ones(size(x));
       confplot(x,y,e,'r')

or even it gives an error if we try:

       confplot(x,y,e,'r-')

[Raymond Reynolds]

Ok, but not sure its very good for multiple plots, which is what i want for comparing overlapping intervals- can't easily control which plots overly others.

[Maria Byrne]

Great! Just what I was looking for. Very tidy way to represent range of values found in noisy data. I used this function and then overlaid errorbar on top.

[jarek tuszynski]

Simple and effective. I seem to be using it a lot.

[Kay Thurley]

 

[Jim]

I really appreciated this as a starting point, however, like Raymond Reynolds wrote in a comment in 2006, it doesn't do well for overlapping intervals, because you cannot add/control the alpha of the shaded area. An easier, and more useful way to do the plotting is to replace the area with a patch command. This then allows you to directly control the shading and alpha of the area, the only caveat is that you must have bounded ends, so a check to set the first and last points to be the same in the shaded area is needed. I would be happy to send you my code that I edited to do this for you to update this, or (less desirable), I could upload my own version, but I think replacing with patches is a superior method and allows effective viewing of multiple shaded areas.

[Nathan Orloff]

 

[Nathan Orloff]

Hmmm. Well I gave it a five, because it is easy. Now after using it there are a couple major bugs.

1) It does not output any handles, so you cant conveniently change plot details.

2) It does not allow you to pass a color to shade. So you are stuck with the default options. Errorshade2 can do this, but it is not as easy to implement and debug.

[Nicolas]

Compatible with Laprint.

[Panagiotis]

It's very useful but there is a conflict with the "legend" command.