Problem with plot array of signals(by row) and x axis

I got a 2d array ,that each row represents a signal (for wiener filtering)

          Arr(10,45).

I want to plot,all signals (all column) in same figure, with X axis the K coefficient of wiener fieltering that is

          K=(-11:0.5:11);   
Which is of size=45.I also want it to be with logarithmic in both axis , x and y.
          But when i plot  with[![enter image description here][1]][1]

          loglog(Arr.'); 
          set(gca,'xtick',(-11:0.5:11);
The result is not what i need.
What's going on?thanks in advance.

[Image Analyst]

I'm not sure what you need. If the horizontal axis is supposed to be K, then what value(s) would you have for the "y" axis at each K?

Answer 1

[dpb]

Problem is trying to put negative linearly-spaced values on a log axis; they don't fit all that well...

The x-axis is the ordinal value of [1:length(k)] or 1:45 but you've placed tick marks starting at -11 so that until you use up the values in the array corresponding to the number of elements that are in the negative range, they're out of the axis limits and so don't show.

It's kinda tough to get a set that will work really well, but you can start and it will illustrate what the issue is from

loglog(abs(randn([size(k,2),4])))
xlim([1,length(k)])
set(gca,'xtick',[1:2:length(k)])
set(gca,'xticklabel',k([1:2:end]))

This gives corresponding tick labels at integral values of k which correspond to the locations along the x-axis of the position in the array. As you'll note, there's insufficient room for them once you get above k=0 so you'll want to change the spacing to every 4th or even higher after the first 10 or so; you'll have to 'spearmint to see what works out best for you...

For comparison, try

set(gca,'xtick',[1:2:23 25:4:45])
set(gca,'xticklabel',k([1:2:23 25:4:end]))

Legible, but still far from ideal...."salt to suit"