How can I have thicker axis lines on only certain values using surfc?

I'm using surfc to plot a 42x42 graph, which is then viewed from the top down. There is a meaningful difference between every 7 values, and as such I would like the x and y axis lines to be thicker for every 7th value (i.e. 7,14,21,28...). This would create a 7x7 grid within the 42x42. Is there an easy way to do this?

Answer 1

[Ben11]

Here is a simple way, drawing line objects at evenly spaced locations on your axis. I generate a dummy 2D plot but you can do the same with your surfc plot:

clear
clc

x = 1:15*pi; % dummy data to plot

A = 0:7:42; % generate regularly spaced values.

plot(abs(42*sin(x)));

xlim = get(gca,'XLim'); % get axis x limits
ylim = get(gca,'YLim'); % get axis y limits

hold all

for k = 1:7 % number of lines

      line('XData',[A(k) A(k)],'YData',[ylim(1) ylim(2)],'LineWidth',1.5);% vertical lines
      line('XData',[xlim(1) xlim(2)],'YData',[A(k) A(k)],'LineWidth',1.5); % 

end

set(gca,'XLim',[0 42],'YLim',[0 42],'XTick',0:7:42,'YTick',0:7:42);

hold off

This results is the following:

Hope that helps! Note that you can also use

grid on

to visualize dotted gridlines.

If it's not what you meant please ask!

[Arran]

Thanks for your reply! This looks great, but is there a way of doing it to include lines for all other numbers in the axes? So, every seventh line is thicker than all the others?

[Ben11]

Yes you can set the gridlines to full instead of dashed with this after your first call to plot:

set(gca,'gridlinestyle','-')

and then replace the last 2 lines of my answer with these:

   set(gca,'XLim',[0 42],'YLim',[0 42]'XTick',0:1:42,'YTick',0:1:42);% i.e. remove the change to'XTick' and 'YTick' 

   hold off
   grid on

Then your grids will appear full and the thicker lines added in the loop will as well. Is it what you mean? If not please ask :)

[Ben11]

@Arran so does it work?