Non-linearly spaced graph

How is it possible to create this graph's x and y axis?

[Ameer Hamza]

Do you have the equation of these lines?

[Farid]

No equation is provided, what I want to do is creating a figure with this scanned plot as its background then assigning the corresponding values to x and y axis.

thank you

Answer 1

[Walter Roberson]

Heavy lines are drawn corresponding to XTickValues and YTickValues, provided that axis XGrid = 'on' and YGrid = 'on'. The positions do not need to be regular.

Lighter dashed lines are drawn corresponding to the axis XRuler.MinorTickValues and YRuler.MinorTIckValues, provided that XMinorGrid = 'on' and YMinorGrid = 'on' . However, I cannot find any way to customize the minor grid at the moment. I thought I had found a customization if XRuler.MinorTick is 'on' and YRuler.MinorTick is 'on' by adjusting XRuler.MinorTickChild but that turns out to only affect drawing ticks at the MinorTickValues location. I guess in theory you could adjust XRuler.MinorTickChild.VertexData and related parameters to extend those tick marks across the axes, but I don't know that it would be worth the trouble.

[Farid]

Thank you Walter, let me know if you ever find a quick way to do that.

[Farid]

very helpful Walter, did it.

[Walter Roberson]

What did you end up doing?

[Farid]

might be a bit silly, but since it's once in a life time code:

xticks([0 0.095 0.2 0.325 0.42 0.528 0.65 0.75 0.84 0.98])

xticklabels({'.005','.01','.02', '.05','.1', '0.2','0.5','1','2','5'})

[Walter Roberson]

?? Why would use use xticklabels that do not match to the xticks? For example why would you label 0.98 position as being 5 ???

If it is because of the different spacing, then what you should be doing is using a log axes, using

set(gca, 'XScale', 'log', 'YScale', 'log')

Answer 2

[Farid]

I did it this way:

figure(1)

I = imread('askf1.png');

h = image(xlim,ylim,I);

xticks([0 0.095 0.2 0.325 0.42 0.528 0.65 0.75 0.84 0.98])

xticklabels({'.005','.01','.02', '.05','.1', '0.2','0.5','1','2','5'})