generated from mwc/lab_scatter
71 lines
2.1 KiB
Python
71 lines
2.1 KiB
Python
# transform.py
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# ------------
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# By MWC Contributors
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# The functions in this module transform data.
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# None of them are finished; this is your job!
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def maximum(data):
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"Returns the largest number in data"
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highest = data[0]
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for number in data:
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if number > highest:
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highest = number
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return highest
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def minimum(data):
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"Returns the smallest number in data"
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lowest = data[0]
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for number in data:
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if number < lowest:
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lowest = number
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return lowest
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def bounds(data):
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"Returns a list of the smallest and largest numbers in data"
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return [minimum(data), maximum(data)]
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def clamp(value, low, high):
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"""Clamps a value to a range from low to high.
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Returns value if it is between low and high.
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If value is lower than low, returns low. If value is higher than high, returns high.
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"""
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for number in value, low, high:
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if value < low:
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return low
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if value > high:
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return high
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else:
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return value
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def ratio(value, start, end):
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"""Returns a number from 0.0 to 1.0, representing how far along value is from start to end.
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The return value is clamped to [0, 1], so even if value is lower than start, the return
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value will not be lower than 0.0.
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"""
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for number in value, start, end:
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if value < start and value < end:
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return 0.0
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if value > start and value > end:
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return 0.0
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else:
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return (float(value)-float(start))/(float(end)-float(start))
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def scale(value, domain_min, domain_max, range_min, range_max):
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"Given a value within a domain, returns the scaled equivalent within range."
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for number in value, domain_min, domain_max, range_min, range_max:
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return float(range_min)+ratio(value, domain_min, domain_max) * (float(range_max-range_min))
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def get_x_values(points):
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"Returns the first value for each point in points."
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x=[point[0]for point in points]
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return(x)
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def get_y_values(points):
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"Returns the second value for each point in points."
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y=[point[1]for point in points]
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return(y) |