Hi,

I would like to draw a figure with shared X axis in semilogx, where the upper panel would show a scatter plot of these points (x, y), and the bottom would show an histogram of the values of x, with bins having steps of 0.1 IN LOG10. I would like to have the tickmarks like in a semilogx plot (so with something like gca().set_xscale('log')).

==> I am desperately trying that but didn't find a working solution yet.

Below is an illustration of what I am plotting, but without any suggestion for getting the right tickmarks/xaxis etc..

any input welcome here! Thanks in advance for your help

Eric

## ยทยทยท

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My dataset would be for example:

x = rand(100)

y = rand(100)

# sel1 and sel2 being some selection of x

# here is just a working - but stupid - example

sel1 = (x < 0.5)

sel2 = (x > 0.5)

selx1 = compress(sel1, x)

selx2 = compress(sel2, x)

bins = arange(-2,0.1,0.1)

width=0.05

n1, n1bins, patches1 = hist(log10(selx1), bins)

n2, n2bins, patches2 = hist(log10(selx2), bins)

clf()

a = axes([0.15,0.4,.8,.55])

scatter(x, y)

setp(a, xticklabels=[])

b = axes([0.15,0.05,.8,.35])

p1 = bar(n1bins, n1, width, color='chartreuse')

p2 = bar(n2bins, n2, width, color='khaki')

# xlim(10**(-3.),10**(0.))

# of course this xlim does not work at all... and

# I would like to have the tickmarks and labels right