scatter_matrix: coordinate misalignment among diagonal and off-diagonal plots

[acorbe]

I make extensive use of scatter_matrix and I find misalignments in the coordinates of the scatter plots (off-diagonal) and the histograms (on-diagonal) which seem undesirable to me.

Consider the picture
).

In this case, there is a clear misalignment (of about .02) in the x-coordinate between the subplot in position 1,2 and the subplot in position 2,2.
In other words, the peeks in subplots 1,2 and 2,2 should occur at the same x location
(at least, IMHO, this would be more meaningful behavior).

[TomAugspurger]

Can you share the data that generated the plot? (or some fake data that gives a similar picture)

[acorbe]

This gives the problem to me

 a = - np.linspace(.4,.6,5000) + np.random.randn(5000)
 b = np.linspace(.9,1,5000) + .1*np.random.randn(5000)
 db = pd.DataFrame(zip(a,b),columns=list('ab'))
 pd.scatter_matrix(db)   

It seems that the x-coordinate increment is different in subplot 1,1 and subplot 2,1.
The offset (x_11 - x_21) ranges from 0 (at the center of the quadrants) to almost 1 (in this case) at the boundary.
The x-values are hand taken from the status bar.

[jreback]

closed by 2f24ff2