How can I update the x axis limit inside a loop?

% parameters
omav = 5*1000*2*pi; % omega average, center

sigma = [0,0.5,1,2,5].*1000*2*pi; % std deviation. A.K.A width

t = 100;
for i=1:length(sigma)
om = linspace(-3*sigma(i), 3*sigma(i),100);

num = -(om-omav).^2;
den = 2.*sigma(i).^2;
gaus = exp(num./den);

figure(i), plot(om, gaus)
title( [' for sigma = ' num2str(sigma(i)/(2000*pi))] )


set(gca,'xlim',[om(1) om(end)])


end

This is my code, i'm trying to make each figure with new x limits from the value of the variable omm but i get an error says:

" Error using matlab.graphics.axis.Axes/set

While setting the 'XLim' property of 'Axes':

Value must be a 1x2 vector of numeric type in which the second element

is larger than the first and may be Inf "

I thought this because of the zero value of first sigma, therefore i added an if statement that if i>1 , set the x limits, and the error disappeared, but the limits still as they were.

Answer 1

[Adam Danz]

On the first iteration, om is all 0s so [om(1) om(end)] returns [0,0] which, as you pointed out, is not allowed when setting axis limits. Here are two ways around that.

Method 1: offset one of the limit values by a very tiny number

set(gca,'xlim',[om(1), om(end)+realmin])
% --or--
set(gca,'xlim',[om(1)-realmin, om(end)])

Method 2: set a default limit when the limits are equal

xl = [om(1), om(end)]; 
if isequal(xl(1),xl(end))
    xl = [0,1]; 
end
set(gca,'xlim',xl)

[Adam Danz]

The xlim is working. Look at your data more closely and you'll see that the blue line terminates at the end of the x axis.

What were you expecting to see?

[Muhamed Sewidan]

I wanted it to show the whole plot, as you can see it is cutted. but, I've found that this is the last value