Change label frequency m_map

My longitude tick labels are overlapping, and I cannot find in the documentation how to fix this or change tick frequency. I have only found how to change the m_map tick label properties (font size, etc.. ) but not the number of ticks.

Right now my code is

bndry_lon=[-176.5 -176.5 -160.0 -160 -176.5 -164.5 -164.5 -176.5];
bndry_lat=[71.2 72.9 72.9 71.2 71.2 71.2 69.304 69.304];

clf;
m_proj('mercator','long',[-179.0 -145], 'lat', [50, 75],'rectbox','on');
m_gshhs_i('color','k'); % coastline
m_gshhs_i('speckle','color','k');    % with speckle added

m_hatch(bndry_lon,bndry_lat,'cross',40,7,'color','k'); % ...with hatching added.
m_coast('patch',[.7 .7 .7],'edgecolor','k');
[CS, H] = m_elev('contourf',3,'b');

m_grid('linewi',2,'linest','none','tickdir','out','fontsize',12);
title('Chukchi domain of selected winds','fontsize',14);

Answer 1

[Fernand ASSENE]

Hi pwprnt, i saw your question yesterday when i was trying to do the same thing as you. Finally i found the solution.

"help m_grid" shows wrong way to use "xtick" option i thing, It's very annoying. Or it works depending on MATLAB version you use, i don't know.

help proposes to use as :

 'xtick',[ num | [value1,value2, ...]  % num = number of ticks

Above a wright way to use this option that i found :

 'xtick',([value1 value2, ...])

This is an example

m_grid('linewi',2,'linest','none','tickdir','out',...
     % set "xtick"/"ytick" values as you want, but must ranging from min to max of each coordinate
       'xtick',([-40 -30 -20 -10 0 10]),...  % longitude   
       'xticklabel',{'40°W','30°W','20°W','10°W','0','10°E'}); % name longitude ticks as you want
       'ytick',([-6 -4 -2 0 2 4 6])); % latitude        
       'xticklabel',{'6°S','4°S','2°S','0','2°N','4°N','6°N'}); % name latitude ticks as you want

I hope it will be useful for someone.