32 lines
631 B
Python
32 lines
631 B
Python
import math
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# sign function
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def sgn(x):
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if x>=0:
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return 1
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return -1
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# check whether a number is an integer (with tolerance)
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def isint_nonzero(x):
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if abs(x)<1e-11:
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return False
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return abs(round(x)-x)<1e-11
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# check that a number is in an interval
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def in_interval(x,a,b):
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return x>=a and x<=b
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# remove x from list a
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def remove_fromlist(a,x):
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if x in a:
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a[a.index(x)]=a[len(a)-1]
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a=a[:len(a)-1]
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return a
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# snap to a grid: ceiling
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def ceil_grid(x,size):
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return math.ceil(x/size)*size
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# snap to a grid: floor
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def floor_grid(x,size):
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return math.floor(x/size)*size
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