Suppose you have a slider with given stepsize, say 0.1 like this
@interact
def _(a=slider(1,100,0.1)):
print a
Is it possible to adjust this, such that the number printed to the right of the slider has only one decimal place?
As it is currently implemented, I don't believe slider has such an option to change the format of the displayed value. It would be a pretty easy project for a beginner to add this functionality to Sage. I could imagine changing the code in interact.py so that the display_value option could be passed a format like "%.1f" to indicate to display 1 decimal point.
I think that would be a valuable contribution, I would certainly use it in my interact demos.
This is now Trac #12060 and I will add it to the SD 35.5 wishlist.
@interact
def _(x=slider( map(lambda x:x.n(digits=4),srange( 1,10,.1)) )):
print x
Be aware when using this solution that digits sets the precision of the numerical value of x. Subsequent computations are limited by that precision and this can lead to unexpected round-off errors.
Asked: 2011-11-19 17:54:50 +0100
Seen: 1,571 times
Last updated: Feb 21 '13
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Would that just print the number with one decimal place, even though the actual number is not that? Or do you want the actual number to be what is displayed?
If I set the steps to 0.03 I want 2 decimal places and so on. However it would be sufficient to adjust this independently of the step-size. Just say "I want n-decimal places"...
The same question asked at http://ask.sagemath.org/question/800/interact-variable-print-formatting