Commit15571fc

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ENH: Add warning for SymLogScale when values in linear scale

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Lines changed: 5 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -389,6 +389,11 @@ def __init__(self, base, linthresh, linscale):`
`389`	`389`
`390`	`390`	`deftransform_non_affine(self,a):`
`391`	`391`	`abs_a=np.abs(a)`
	`392`	`+if (abs_a<self.linthresh).all():`
	`393`	`+_api.warn_external(`
	`394`	`+"All values for SymLogScale are below linthresh, making "`
	`395`	`+"it effectively linear. You likely should lower the value "`
	`396`	`+"of linthresh. ")`
`392`	`397`	`withnp.errstate(divide="ignore",invalid="ignore"):`
`393`	`398`	`out=np.sign(a)self.linthresh (`
`394`	`399`	`np.power(self.base,`

Lines changed: 21 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -14,6 +14,8 @@`
`14`	`14`	`importio`
`15`	`15`	`importpytest`
`16`	`16`
	`17`	`+importrandom`
	`18`	`+`
`17`	`19`
`18`	`20`	`@check_figures_equal()`
`19`	`21`	`deftest_log_scales(fig_test,fig_ref):`
`@@ -55,6 +57,25 @@ def test_symlog_mask_nan():`
`55`	`57`	`asserttype(out)==type(x)`
`56`	`58`
`57`	`59`
	`60`	`+deftest_symlog_linthresh():`
	`61`	`+fig,ax=plt.subplots()`
	`62`	`+`
	`63`	`+n_samples=100`
	`64`	`+`
	`65`	`+upper_bound=1.0`
	`66`	`+`
	`67`	`+x= [random.uniform(0.0,upper_bound)for_inrange(n_samples)]`
	`68`	`+y= [random.uniform(0.0,upper_bound)for_inrange(n_samples)]`
	`69`	`+`
	`70`	`+withpytest.warns(UserWarning)asrecord:`
	`71`	`+plt.plot(x,y,'o')`
	`72`	`+ax.set_xscale('symlog')`
	`73`	`+ax.set_yscale('symlog')`
	`74`	`+plt.show()`
	`75`	`+`
	`76`	`+assertlen(record)==1`
	`77`	`+`
	`78`	`+`
`58`	`79`	`@image_comparison(['logit_scales.png'],remove_text=True)`
`59`	`80`	`deftest_logit_scales():`
`60`	`81`	`fig,ax=plt.subplots()`

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