Error using cbarf colorbar

Hey there, I am trying to plot a colorbar next to my contourplot like this:

        m_proj('mollweid','clong',180);
        m_contourf(Lon_coord,Lat_coord,Inc,36);

        cbarf(Inc,36,'vertical','linear');

So I am plotting magnetic inclination for earths surface via longitude and latitude. The plot works very well but the cbarf returns the following error:

        ??? Error using ==> set
        Bad property value found.
        Object Name :  axes
        Property Name : 'YLim'
        Values must be increasing and non-NaN.

        Error in ==> ylim at 44
            set(ax,'ylim',val);

        Error in ==> cbarf at 224
          ylim(yl)

        Error in ==> jkb_script at 49
            cbarf(Inc,36,'vertical','linear');

There is a script of my professor which uses cbarf quite similar so it shouldn't be very wrong. Maybe the projection applies settings to the axes that confuse cbar? Thanks for your help!

Jakob

[Image Analyst]

cbarf? Isn't that what happens when you go to a college party?

Answer 1

[Walter Roberson]

Glancing at the code it appears to me that that problem would occur if you only specify one level.

I did not run the code through a debugger to be sure of that, however.

[Jakob]

Do you mean one contour level?

There are supposed to be 36 levels for a range of 180.

[Walter Roberson]

I do not see any support in the cbarf file contribution for the possibility of specifying the number of levels, just the actual levels.

[Jakob]

But they are the same in both arguments anyway.

I'm sorry but I don't really get your point.

[Walter Roberson]

You are using a user-contribution, cbarf, not a MATLAB provided routine, and expecting that the behavior for it will match that of a completely different user-contribution, m_contourf, by a different author, from the m_map package at http://www.eos.ubc.ca/~rich/private/mapug.html -- a behavior that the documentation for the second user-contribution does not describe as existing but which happens to work.

The work-around to bring the contributions in to alignment is to extract the levels chosen by the contour routine.

[c, h] = m_contourf(Lon_coord,Lat_coord,Inc,36);

clear c

levels = get(h,'LevelList');

cbarf(Inc,levels,'vertical','linear');

[Jakob]

Thank you very much! That solved it.