negative values for 'ylim' results in error

Hi,

i'm trying to use the 'ylim'-commad to specify my axes format. Works fine for positive values, but if 'ylim' turns out to be negative i get the following error is there a way bypass this problem:

axes('box','on',... 
  'LineWidth',2,...
  'FontName','times',...
  'FontSize',22,...
  'ylim',[0 -1.2],... 
  'YTick', 0:(-1.2/6)  :-1.2,...
  'xlim',[0 0.3],...
  'XTick', 0:0.3/6:0.3);

results in:

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

Error in ==> XXXX at 76
axes('box','on',...

Great Thanks!

[Andrei Bobrov]

'ylim',[-1.2 0 ],...

'YTick', -1.2:(1.2/6):0,...

Answer 1

[Wayne King]

Hi, if you want to change the direction of the yaxis, you can set 'ydir' to 'reverse'

plot(randn(100,1));
% set(gca,'ylim',[0 -1.2])  gives an error, but
set(gca,'ylim',[-1.2 0]);
set(gca,'ydir','reverse');

is ok.

Wayne

[Wayne King]

The 'ylim' values have to be increasing as the error states

[Jan]

And if you are not sure about the order, because you use variables:

set(gca, 'YLim', sort([a,b]));

Answer 2

[Patrick]

sorry i was a bit thick on that one, solved by switching to [-1.2 0] arrg

but thanks anyway!